Science EARS review Flashcards by Ronnel Unknown

Grasses, shrubs, and trees are called producers because they make

A. water B. minerals
C. carbon dioxide D. food

D. food

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The diagram shows food web for a community. Which organisms in the diagram are carnivores?

A. rabbits and birds B. carrots & grass
C. mice & grasshoppers D. foxes and owls

D. foxes and owls

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In which type of rock is the fossil imprint of a fern leaf most likely to be round

A. igneous B. metamorphic
C. sedimentary D. volcanic

C. Sedimentary

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Which process is an example of a physical change
A. wood burning
B. iron casting
C. ice melting
D. milk souring

C. ice melting

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All living organisms are dependent on plants because plants
A. produce carbon dioxide
B. remove oxygen from the air
C. are producers
D. are consumers

C. are producers

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Which event is a chemical change
A. the baseball strikes the roof
B. the roof of the car dents
C. the paint crack and chips
D. the exposed metal rusts

D. the exposed metal rusts

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What is the main function of the circulatory system?
A. secretes enzymes
B. produce hormones
C. digest proteins
D. transport materials

D. transport materials

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Components of a mixture can be separated by?
A. physical means
B. chemical reaction
C. both a & b
D. cannot be determined

A. Physical means

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Sand and water are mixed. They can be separated by the process of?
A. filtration
B. evaporation
C. chlorination
D. distillation

A. filtration

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Which of the following is a heterogeneous mixture
A. condensed milk
B. paint
C. calamansi juice
D. nail polish with glitters

D. nail polish with glitters

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Some characteristics of _________ are they can move, grow, breath and multiply
A. living things
B. mixtures
C. pure substances
D. solids

A. living things

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Only one kind of material comprises a
A. mixture
B. compound
C. pure substance
D. solution

C. pure substance

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Which energy transformation occurs in a telephone?
A. mechanical to heat
B. sound to electrical
C. electrical to sound
D. heat to sound

C. electrical to sound

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Which kind of energy is found in a waterfall
A. potential
B. kinetic
C. mechanical
D. geothermal

C. mechanical

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The best heat insulator among the following materials is
A. copper
B. wood
C. iron
D. silver

B. wood

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Which of the following is the best conductor of electricity
A. copper
B. glass
C. mica
D. bronze

A. copper

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If a bar magnet is placed near the mixture of sulfur and iron fillings the bar magnet will
A. attract the sulfur
B. attract the iron fillings
C. repel the iron fillings
D. have no reaction nor attraction

B. attract the iron fillings

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Sugar is an example of a _________
A. an atom
B. an element
C. mixture
D. compound

D. compound

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Materials made of _____ are good conductors of both heat and electricity.
A. glass
B. plastic
C. cloth
D. metal

D. metal

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Which of the following statements describes the characteristics of molecules of solids?
A. Molecules move freely in all directions
B. Molecules have big spaces between them
C. Molecules vibrate in a fixed position
D. Molecules are not closely packaged together

C. Molecules vibrate in a fixed position

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An object will sink in water if ________.
A. Its temperature is lower than that of water
B. Its boiling point is greater than that of water
C. Its density is greater than that of water
D. Its volume is smaller than that of water

C. Its density is greater than that of water

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Dewdrops are observed on plants leaves in the morning. Which phase change is involved?
A. liquid to gas
B. gas to liquid
C. liquid to solid
D. solid to liquid

B. gas to liquid

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What method is used to recover pure water and salt from sea water?
A. filtration
B. desalination
C. evaporation
D. decantation

C. evaporation

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Which is not true about mass?
A. Mass is the amount of matter present in an object
B. mass remains the same anywhere
C. mass can be measured by platform balance
D. mass is the pull of gravity on an object

A. Mass is the amount of matter present in an object

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Random movement of particles is least observable in
A. liquid
B. gas
C. plasma
D. solid

D. solid

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Which of the chemical systems below exhibit chemical changes?
1. rusting of an iron nail
2. melting of ice cream
3. ripening of mango
4. boiling of water
A. 1&2
B. 2&4
C. 1&3
D. 3&4

C. 1 and 3
rusting of an iron nail
ripening of mango

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The following are all compounds except
A. sea water
B. dry ice
C. charcoal
D. hydrochloric acid

A. sea water

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Which is the smallest particle of a substance by which we can recognize that substance?
A. Molecule
B. Compound
C. Element
D. Atom

D. Atom

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Which of the following can be a source of energy?
A. Animal Manure
B. Chemicals
C. Decayed Plants
D. All of these

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Which of the following is a heterogeneous mixture?
A. Soil
B. Milk
C. Air
D. Limewater

A. Soil

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Gas spreads out spontaneously to occupy a space uniformly. This property of gases is known as
A. expansion
B. Pressure
C. Diffusion
D. Low density

C. Diffusion

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A compound may be represented by
A. A chemical formula
B. A symbol
C. A radical
D. An equation

A. Chemical formula

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When the substance is heated, it expands because
A. The molecules expand
B. The molecules increase in number
C. The molecules move further apart
D. The molecules exert pressure

C. The molecules move farther apart

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What information does the subscript in the formula of a compound provide?
A. The kind of element present
B. The volume and amounts of element present
C. The number of atoms of the element
D. The volume and the amount of elements

C. the number of atoms of the element

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The moon is visible to observers on earth because of
A. It reflects light from the earth
B. Absorbed light from Earth’s atmosphere
C. burning gases in the Moon interior
D. Reflected sunlight

D. Reflected sunlight

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The length of the year is equivalent to the time it takes for the
A. rotation of stars
B. rotation of the moon
C. revolution of earth around the sun
D. revolution of the moon

C. revolution of earth around the sun

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Earth gets most of its light from
A. The stars
B the sun
C. The moon
D. Other planets

B. The sun

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In which list are celestial features correctly shown in order of increasing size
A. Galaxy-solar system-universe-planet
B. Solar system- galaxy- planet - universe
C. Planet- solar system- galaxy- universe
D. Universe- galaxy- solar system- planet

C. Planet- solar system-galaxy-universe

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Approximately how long does it take to cycle from one new moon to the next new moon
A. a day
B. A month
C. A week
D. a year

B. A month

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Which statement explains why the Sun appears to rise and set each day
A. Earth rotates
B. The sun rotates
C. The sun revolves around the Earth
D. Earth revolves around the Sun

A. Earth rotates

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The green pigment found in plants that performs photosynthesis is:
A. Melanin
B. Chlorophyll
C. Chloroplast
D. Chromatosphere

B. Chlorophyll

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Which form of energy is produced by a burning candle
A. heat and mechanical
B. Electrical and sound
C. Light and Electrical
D. Heat and Light

D. Heat and Light

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Many common liquids are not pure substances, but are solutions with water as solvent. Solution with water as the solvent blends easily with pure water. Which of the following liquids does NOT have water as solvent.
A. Cooking oil
B. Milk
C. Fruit Juice
D. Vinegar

A. Cooking oil

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Which of the following mixtures of solids could be separated easily by adding water and then filtering the mixture
A. Salt and Sugar
B. Sand and Iron Fillings
C. Salt and Sand
D. Sugar and Flour

C. Salt and Sand

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Which term best describes the relationship between the hawk and the field mouse
A. Competition
B. Mutualism
C. Predation
D. Symbiosis

C. Predation

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Which object will require most energy to move it from its position
A.Bus
B. Bike
C. Car
D. Skate

A. Bus

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In the carbon - oxygen cycle, animals release carbon dioxide through:
A. Respiration
B. Oxygenation
C. Carbonation
D. Carboxylation

A. Respiration

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Water boiled in a pan on a stove. The state of matter of the water changes from
A. Liquid to solid
B. Solid to liquid
C. Gas to liquid
D. Liquid to gas

D. Liquid to gas

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The gas that plants use raw materials in photosynthesis is:
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Carbon monoxide

C. Carbon Dioxide

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Rocks are the fundamental building blocks of what layer of the earth
A. Atmosphere
B. Lithosphere
C. Hydrosphere
D. Inner core

B. Lithosphere

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Which is NOT a type of rock
A. Igneous
B. Metamorphic
C. Volcanic
D. Sedimentary

C. Volcanic

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What type of rock is formed from magma
A. Igneous
B. Metamorphic
C. Volcanic
D. Sedimentary

A. Igneous

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What is formed when parent rocks experiences heat and pressure
A. Magma
B. Sediments
C. New rocks
D. Metamorphic rocks

D. Metamorphic rocks

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What is the substance formed when different minerals are fused together
A. Rock
B. Water
C. Magma
D. Sediments

A. Rock

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This type of rock can be found near the volcanic areas.
A. Sedimentary
B. Igneous
C. Metamorphic
D. Sand

B. Igneous

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What kind of igneous rock is formed above Earth’s surface
A. Extrusive
B. Intrusive
C. Organic
D. Inorganic

A. Extrusive

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Which is NOT an example of sedimentary rock
A. Gypsum
B. Limestone
C. Gneiss
D. Coal

C. Gneiss

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What ilcan transform a parent rock into a metamorphic rock
A. Volcano
B. Sediments
C. Fossils
D. Heat

D. Heat

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The following are examples of metamorphic rock except
A. Slate
B. Pumice
C. Marble
D. Quartzite

B. Pumice

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What type of sedimentary rock is formed from the remains of plants/animals
A. Organic
B. Inorganic
C. Intrusive
D. Foliated

A. Organic

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Which of the following is incorrectly paired
A. Intrusive Granite
B. Sedimentary sand
C. Metamorphic Clay
D. Extrusive Basalt

C. Metamorphic Clay

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Which process forms a detrital sedimentary rock ?
A. Lithification
B. Compaction
C. Foliation
D. Crystallization

C. Foliation

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The name given to the layers of the sedimentary rock is
A. Strata
B. Deposition
C. Compaction
D. Fossils

A. Strata

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How can you tell wether the igneous rock formed below or above the Earth’s surface?
A. From its color
B. From its grain size
C. From its hardness
D. From its mass

B. From its grain size

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In order for a sedimentary rock to become a metamorphic rock the parent rock must
A. be buried deeper into the earth
B. be uplifted to the surface of the earth
C. have babies
D. be eroded

A. be buried deeper into the earth

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What is the difference between volcanic and plutonic rocks
A. Volcanic rocks are sedimentary while plutonic rocks are metamorphic rocks
B. Volcanic rock are fine grained while plutonic rock are coarse grained
C. Volcanic rocks are Detrital while plutonic rocks are organic
D. Volcanic rocks are coarse grained while plutonic rocks are fine grained

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Why do igneous rocks formed beneath the Earth’s surface have large crystals
A. Because lava cools quickly that fine crystals have no time to form
B. Because magma cools slowly
C. Because sediments are cemented together
D. Because fine crystals were covered by large crystals

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How do rocks formed
A. From salts and sediments that are mixed
B. From melted fossils
C. From minerals that are fused together to form a solid lump
D. From pounded and cemented marble

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How does a chemical sedimentary rock formed
A. Fragments are stack together by compaction
B. Plant and animal remains have been transformed into rocks
C. Minerals were dissolved and precipitated to form a rock
D. Parent rocks was changed by the effect of heat and pressure

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Which of the following pair of igneous rock have low silica content
A. Ryolite and Granite
B. Bassalt and Gabro
C. Andesite and Diorite
D. Pumice and Gneiss

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Marble is a metamorphic rock which formerly a sedimentary rock called
A. Pumice
B. Limestone
C. Sand
D. Silt

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It is the process of breaking down or dissolving rocks
A. Saturation
B. Weathering
C. Reduction
D. Division

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The narra tree planted on your backyard causes the alteration of rocks as it grows. What example of physical weathering is being described?
A. Abrasion
B. Exfoliation
C. Plant growth
D. Thermal Expansion

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When a chemical weathering occurs what is being changed in a rock?
A. chemical composition
B. size of the rocks
C. Reaction of the rocks
D. Shape of the rocks

A. Chemical Composition

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Which of the following is NOT an agent of physical weathering, in the process of abrasion?
A. wind
B. carbonic acid
C. water
D. gravity

B. Carbonic Acid

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What is the agent of weathering in the process of thermal expansion?
A. gravity
B. pressure from plant roots
C. burrowing of animals
D. Change in temperature

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Mechanical weathering is the?
A. breakdown of rocks into smaller pieces by physical means
B. breakdown of rocks into smaller pieces by chemical means
C. breakdown of rocks into smaller pieces by acid
D. Carrying away of sediments

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If you saw a crack in the road in the winter that was not there the month before, it most likely formed by?
A. Plants
B. ice wedging
C. water abrasion
D. acid precipitation

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Acids in ground water can:
A. create caves
B. cause mountains to form
C. cause plants to grow
D. create salt lakes

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How can oxidation cause the weathering of rocks?
A. by giving a white color to rocks
B. through rusting
C. by forming caves
D. by forming holes in rocks

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How can unloading/exfoliation cause weathering of rocks
A. by releasing the heat
B. by changing the temperature
C. by pressure release
D. by forming caves

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Why is it that many people do not plant climbing vines near their homes?
A. the decomposing leaves release acids that break down plant and concrete
B. plants erode concrete
C. the plants encourage insects whose excreta can greatly damage concrete
D. the plants can damage the concrete by rusting

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A rock fell off from a cliff face and was broken. The agent of erosion from this situation is:
A. wind
B. glacier
C. water
D. gravity

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A hard rock containing a softer rock called regolith is exposed to rain water with carbonic acid. After some time, the hard rock was left standing on its own. How did this happen?
A. Carbonic acid from the rain water reacted with regolith
B. Carbonic acid made the regolith invisible
C. regolith from the hard rock turned into sand after reaching the carbonic acid
D. Regolith was replaced by the hard rock

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Which of the following cannot cause chemical weathering?
A. Plant Acid
B. Carbonic Acid
C. Oxidation
D. Expanding ice

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Which of the following situations shows an example of physical weathering
A. burrowing animals move the broken rock pieces to the surface of the ground.
B. Oxygen interacts chemically with minerals
C. Water interacts chemically with minerals
D. Carbon Dioxide interacts chemically with minerals.

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In what galaxy our planetary system lie?
A. Milky Way
B. Andromeda
C. Spiral
D. Elliptical

A. Milky way

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Which is the center of the solar system
A. Earth
B. Moon
C. Sun
D. Mercury

C. Sun

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Which is true about the solar system
A. It is outside the Milky Way Galaxy
B. Earth is the center of the solar system
C. There are countless of planets in the solar system
D. It is the only place we know that harbors life

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At present how many planets are there in a solar system
A. 7
B. 9
C. 8
D. none

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Which planet do not have any moons?
A. Earth and Mars
B. Mars and Venus
C. Mercury and Mars
D. Mercury and Venus

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Which is not true about the Sun?
A. It is the heart of the solar system
B. The planets move around the sun
C. It is impossible to survive without the sun
D. The gravity of the sun cannot keep the planets in their orbits

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The following is not true about the solar system except:
A. Only the sun and the planets consist the solar system
B. The arrangement of the planets is due to the formation of the solar system
C. All the moons in the solar system awaits confirmation
D. There are nine planets that surround the sun in the solar system

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Which is true about the terrestrial planets?
A. They are cold glass giants
B. They have rocky surfaces
C. They are farther from the sun
D. They have numerous giant moons

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Which is not true about the moons in the solar system?
A. Mercury and Venus do not have any moon
B. Giant planet grab the most moons
C. Jupiter has the most number of moons
D. Each of the moon in the solar system has a name

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This is known as the blue planet
A. Neptune
B. Uranus
C. Earth
D. Mercury

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Which is not a Jovian Planet
A. Jupiter
B. Earth
C. Saturn
D. Uranus

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The following are terrestrial planets except?
A. Mercury
B. Mars
C. Earth
D. Saturn

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What is the hottest planet?
A. Mercury
B. Earth
C. Venus
D. Jupiter

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The only planet with visible rings is the
A. Mercury
B. Mars
C. Earth
D. Saturn

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Which is also known as the Red Planet?
A. Mercury
B. Mars
C. Earth
D. Saturn

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The big storm seen at the surface of Jupiter is called
A. The giant storm
B. The great red storm
C. The solar flares
D. The great red spot

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the following are the galiliean satellites except
A. lo
B. Europa
C. Titan
D. Ganymeda

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Which is true about Mars?
A. It is the closest planet to the sun
B. It is sometimes called the Great Planet
C. It has the most number of moons
D. It has rusty iron in the ground

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What nickname is given to Venus because of its size?
A. The red planet
B. The blue planet
C. The twin planet
D. The cute planet

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Which is true about Jupiter?
A. One of its moon is called Titan
B. It is a rocky giant planet
C. It has a big volcanoes in the surface
D. It contains the most number of moons

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Which is not true about the Earth?
A. It is the only habitable planet
B. It has only one moon
C. Most of the gas in the atmosphere is nitrogen
D. Water covers 50% of earth

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The source of energy for all the biosphere of the earth is the
A. Sun
B. atmosphere
C. hydrosphere
D. lithosphere

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The sphere of interaction of plants and animals is called
A. biosphere
B. ecosphere
C. hydrosphere
D. lithosphere

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All life forms on earth are located in the
A. lithosphere
B. atmosphere
C. biosphere
D. hydrosphere

What is manufactured in the process of photosynthesis?
A. sugars (carbohydrates)
B. protein
C. oxygen
D. carbon dioxide

Organisms that possess the ability to manufacture food from inorganic substances
A. autotrophs
B. heterotrophs
C. chemotrophs
D. Saprotrophs

Which is inorganic?
A. water
B. carbohydrate
C. leaf
D. animal skin

The study of the interaction between the organism and its environment is
A. ecosystem
B. ecology
C. biology
D. entomology

The gas that plants use as raw material in photosynthesis is
A. Oxygen
B. nitrogen
C. carbon dioxide
D. helium

What is the component of green plants that enable them to perform photosynthesis
A. roots
B. chlorophyll
C. leaves
D. flowers

An alligator can be classified as
A. omnivore
B. herbivore
C. carnivore
D. All of these

The producers in an ecosystem are the
A. herbivores
B. autotrophs
C. heterotrophs
D. carnivore

Animals in the ecosystem are classified as
A. herbivore
B. autotrophs
C. heterotrophs
D. carnivore

All living organisms are dependent on plants because plants
A. produce carbon dioxide
B. are producers
C. remove oxygen from the air
D. are consumers

When a snake eats a grain- eating bird, then the snake is a
A. producer
B. herbivore
C. carnivore
D. decomposer

The arrow in the food chain always points to the
A. producer
B. organism which is eaten
C. the eater
D. the source of energy

The food chain starts with
A. producer
B. organism which is eaten
C. the eater
D. the source of energy

The first animal in the food chain is

herbivore

What important idea can be extracted from the concepts of food chain and food web
A. interdependence of different species
B. feeding animal is a noble task
C. killing is not good
D. the natural world is a home to all species

In the food chain and food web, much food is available to which organism?
A. producers
B. herbivore
C. carnivore
D. omnivore

What is passed on from one organism to another in the food chain and food web.
A. producer
B. energy
C. arrow
D. decomposer

Which organism is on top of the food chain/food web
A. producer
B. herbivore
C. carnivore
D. decomposer

What is shown in the food web/food chain?
A. The flow of energy in the ecosystem
B. The relationship among organism
C. The consumers in the ecosystem
D. how organism survive in an ecosystem

The principal difference between heterotrophs and autotrophs is that
A. Heterotrophs produce their own nutrients and autotrophs do not
B. heterotrophs rely on other organisms for nutrition and autotrophs do not
C. heterotrophs perform photosynthesis and autotrophs do not
D. heterotrophs require oxygen and autotrophs do not

Which statement is true concerning producers
A. they are heterotrophic
B. they represent the smallest single component of the Earth’s biomass
C. they derive their energy directly from organic compounds
D. They derive their energy directly from solar energy

The phase of moon when we see the lighted part on Earth is?**

A. Waxing Crescent
B. Full Moon
C. New Moon
D. Half Moon

Which is NOT a lunar phase?**

A. Waxing Gibbous
B. Waning Crescent
C. Second Quarter
D. First Quarter

The moon does not shine. Where does the light of the moon come from?**

A. Other Moon
B. Earth
C. Electricity
D. Sun

What is the other term for moon in Italian?**

A. Cyprus
B. Mona Lisa
C. Luna
D. Selene

What is the phase of the moon when the lighted part is away from the Earth?**

A. New Moon
B. Full Moon
C. Half Moon
D. Crescent

How long does it take to complete one lunar cycle?
A: 7 days
B: 24 hours
C: 29.5 days
D: 12 hours

What is the direction of the moon’s motion?
A: eastward
B: westward
C: southward
D: random

How far is the moon from the Earth?
A: 150 million km
B: 240,000 km
C: 385,000 km
D: 150,000 miles

Which phenomenon occurs on a full moon?
A: Solar eclipse
B: Lunar eclipse
C: Storm
D: Earthquake

Which phenomenon occurs on a new moon?
A: Solar eclipse
B: Lunar eclipse
C: Earthquake
D: Meteor

What is the point in a moon’s orbit that is farthest from the earth?
A: Aphelion
B: Perihelion
C: Apogee
D: Perigee

How long does it take for moon to complete one rotation around the earth?
A: 28-31 days
B: 12 hours
C: 27.3 days
D: 24 hours

What is the point in the moon’s orbit that is nearest to earth?
A: Aphelion
B: Perigee
C: Apogee
D: Perihelion

What causes tides to occur?
A: Heat energy from the sun
B: The gravitational pull of the moon on earth
C: Waves
D: Moon’s orbit

Which is true about the moon?
A: It is revolving around an asteroid.
B: Each moon has other moons.
C: It is the nearest neighbor of the earth.
D: It is the brightest object in the sky.

Which is true about Neap tides?
A: It occurs when the moon is aligned on earth.
B: It occurs when the moon is aligned on the sun.
C: It occurs when the moon, sun, and earth are aligned.
D: It occurs when the moon and sun are perpendicular to the earth

What occurs when the sun and moon are aligned?
A: Spring tides
B: Solar radiation
C: E-mirroration
D: Moon’s crater

Which is not true about the moon?
A: The surface of the moon has craters.
B: The moon is the only natural satellite of the Earth.
C: It is the nearest neighbor of the earth.
D: It is the second brightest object in the night sky.

Which is true about lunar eclipses?
A: It occurs on a new moon.
B: It occurs when the Earth’s shadow covers the moon.
C: It occurs when the moon’s shadow covers the earth.
D: It can occur every month

In which galaxy does our planetary system lie?
- A. Milky Way
- B. Andromeda
- C. Spiral
- D. Elliptical

Which is the center of the solar system?
- A. Earth
- B. Moon
- C. Sun
- D. Mercury

Which is true about the solar system?
- A. It is outside the Milky Way Galaxy
- B. It is in the center of the universe
- C. There are a group of planets in the solar system
- D. There are stars that are found that orbit the planets

Which planets in the list do not have any moons?
- A. Earth and Mars
- B. Mercury and Mars
- C. Mars and Venus
- D. Mercury and Venus

The seventh planet in the solar system is the

A. Jupiter
B. Neptune
C. Uranus
D. Saturn

Which is true about the solar system?
- A. It is outside the Milky Way Galaxy
- B. Earth is the center of the solar system
- C. There are countless of planets in the solar system
- D. It is the only place that we know that harbors life

Which is not true about the sun?
- A. It is the heart of the solar system
- B. The planets move around the sun
- C. The asteroids move around the sun
- D. The gravity of the sun cannot keep the planets in their orbits

Which is not true about the solar system except:
- A. Only the sun and the planets consist the solar system
- B. The arrangement of planets is due to the formation of the solar system
- C. All the moons in the solar system are confirmation
- D. There is one planet that surrounds the sun in the solar system

Which statement is true about the terrestrial planets?
- A. They are cold gas giants
- B. They have rocky surfaces
- C. They have orbital rings for the sun
- D. They have millions of giant moons

Which is not true about the moons in the solar system?
- A. Mercury and Venus do not have any moon
- B. The giant planet grabs the most moons
- C. Jupiter has the most number of moons
- D. Each of the moons in the solar system has a name

What is a compound?
- A. A single element
- B. A mixture of two or more elements chemically combined
- C. A mixture of gases
- D. A type of molecule

Which of the following is a compound?
- A. Oxygen
- B. Water (H₂O)
- C. Helium
- D. Nitrogen

What is the smallest unit of an element that retains its properties?
- A. Molecule
- B. Atom
- C. Electron
- D. Compound

How are elements arranged in the periodic table?
- A. By increasing atomic mass
- B. By chemical symbol
- C. By increasing atomic number
- D. By color

What is the chemical formula for table salt?
- A. NaCl
- B. KCl
- C. H₂O
- D. CO₂

Which of the following is a property of metals?
- A. Brittle
- B. Non-conductive
- C. Malleable
- D. Dull

What is the main component of the air we breathe?
- A. Oxygen
- B. Carbon Dioxide
- C. Nitrogen
- D. Helium

Which of the following is a noble gas?
- A. Oxygen
- B. Nitrogen
- C. Argon
- D. Hydrogen

What type of bond involves the sharing of electron pairs between atoms?
- A. Ionic bond
- B. Covalent bond
- C. Metallic bond
- D. Hydrogen bond

What is the most abundant element in the Earth’s crust?
- A. Iron
- B. Silicon
- C. Oxygen
- D. Aluminum

What is the chemical symbol for Gold?
- A. Go
- B. Au
- C. Ag
- D. Gd

Which element is a liquid at room temperature?
- A. Mercury
- B. Sodium
- C. Aluminum
- D. Carbon

A. Mercury

Which of the following is an alkaline earth metal?
- A. Lithium
- B. Sodium
- C. Magnesium
- D. Potassium

What type of element is chlorine?
- A. Metal
- B. Non-metal
- C. Metalloid
- D. Noble gas

Which gas is known as a “greenhouse gas”?
- A. Nitrogen
- B. Oxygen
- C. Carbon Dioxide
- D. Helium

What is the pH of a neutral solution?
- A. 0
- B. 7
- C. 14
- D. 10

Which element is essential for bones and teeth?
- A. Iron
- B. Calcium
- C. Potassium
- D. Sodium

What is the most abundant gas in the Earth’s atmosphere?
- A. Oxygen
- B. Hydrogen
- C. Nitrogen
- D. Carbon Dioxide

Which process separates substances based on boiling points?
- A. Filtration
- B. Distillation
- C. Evaporation
- D. Crystallization

What is a molecule?
- A. A single atom
- B. A group of atoms bonded together
- C. A type of element
- D. A chemical reaction

Which of the following is an example of a diatomic molecule?
- A. H₂O
- B. CO₂
- C. O₂
- D. CH₄

C.O2

What type of bond joins the atoms in a water molecule?
- A. Ionic bond
- B. Metallic bond
- C. Covalent bond
- D. Hydrogen bond

Which molecule is known as the “universal solvent”?
- A. Methane
- B. Water
- C. Ethanol
- D. Carbon Dioxide

What is the main component of natural gas?
- A. Propane
- B. Butane
- C. Methane
- D. Ethane

Which molecule is essential for photosynthesis?
- A. Oxygen
- B. Glucose
- C. Carbon Dioxide
- D. Nitrogen

What is the primary molecule in plant cell walls?
- A. Cellulose
- B. Starch
- C. Glycogen
- D. Chitin

Which molecule carries genetic information?
- A. RNA
- B. Lipid
- C. Protein
- D. DNA

What is the simplest hydrocarbon molecule?
- A. Ethane
- B. Propane
- C. Methane
- D. Butane

Which molecule is commonly known as table sugar?
- A. Glucose
- B. Fructose
- C. Sucrose
- D. Lactose

What is the symbol for Helium?
- A. H
- B. He
- C. Hg
- D. Ho

Which molecule is commonly known as table sugar?
- A. Glucose
- B. Fructose
- C. Sucrose
- D. Lactose

What is the symbol for Iron?
- A. Ir
- B. Fe
- C. In
- D. I

What is the symbol for Sodium?
- A. Na
- B. So
- C. S
- D. Sn

What is the symbol for Gold?
- A. Au
- B. Ag
- C. Gd
- D. Go

A. Au

What is the symbol for Potassium?
- A. P
- B. Po
- C. Pt
- D. K

D. K

What is the symbol for Lead?
- A. L
- B. Pb
- C. Pd
- D. Le

B. Pb

What is the symbol for Silver?
- A. Si
- B. Ag
- C. Al
- D. Au

B. Ag

What is the symbol for Nitrogen?
- A. Ni
- B. Na
- C. N
- D. Ne

C. N

What is the symbol for Calcium?
- A. Ca
- B. Cl
- C. C
- D. Cs

A. Ca

What is the symbol for Mercury?
- A. Me
- B. Mg
- C. Mn
- D. Hg

D. Hg

What is the term for animals that feed on both plants and animals?
- A. Carnivores
- B. Herbivores
- C. Omnivores
- D. Decomposers

Which of these organisms can be both primary and secondary consumers?
- A. Plants
- B. Herbivores
- C. Omnivores
- D. Decomposers

Which of the following is a secondary consumer?
- A. Grasshopper
- B. Frog
- C. Grass
- D. Sunflower

What happens to energy as it moves up the food chain?
- A. It increases
- B. It remains the same
- C. It decreases
- D. It disappears

What is a food web?
- A. A single pathway of energy flow
- B. A complex network of interconnected food chains
- C. A group of producers
- D. A type of ecosystem

Which of the following is a primary consumer?
- A. Grass
- B. Rabbit
- C. Hawk
- D. Mushroom

In a food web, what role do decomposers play?
- A. They produce energy
- B. They break down dead material
- C. They consume plants
- D. They hunt prey

Which organism is typically at the top of a food chain?
- A. Herbivore
- B. Carnivore
- C. Producer
- D. Decomposer

In a food chain, what term describes organisms that produce their own food?
- A. Consumers
- B. Decomposers
- C. Producers
- D. Scavengers

What is the primary source of energy for most food chains?
- A. Water
- B. Sunlight
- C. Soil
- D. Wind

Which relationship involves one organism benefiting without affecting the other?
- A. Parasitism
- B. Mutualism
- C. Commensalism
- D. Competition

In predation, what is the organism that is hunted called?
- A. Predator
- B. Host
- C. Prey
- D. Symbiont

What relationship is shown when bees pollinate flowers?
- A. Parasitism
- B. Mutualism
- C. Commensalism
- D. Predation

Which relationship involves one organism benefiting at the expense of another?
- A. Mutualism
- B. Commensalism
- C. Parasitism
- D. Symbiosis

What type of relationship is exhibited by barnacles attaching to a whale?
- A. Mutualism
- B. Commensalism
- C. Parasitism
- D. Predation

In parasitism, what is the organism that is harmed called?
- A. Host
- B. Predator
- C. Prey
- D. Symbiont

Which of the following is an example of mutualism?
- A. Fleas on a dog
- B. Barnacles on a whale
- C. Lichens (algae and fungi)
- D. A lion hunting a zebra

What is commensalism?
- A. Both organisms benefit
- B. One organism benefits, the other is harmed
- C. One organism benefits, the other is unaffected
- D. Both organisms are harmed

Which of the following is an example of parasitism?
- A. Bees pollinating flowers
- B. A tapeworm in a human intestine
- C. Clownfish living in anemones
- D. Birds eating insects off a buffalo

What is mutualism?
- A. A relationship where one organism benefits and the other is harmed
- B. A relationship where both organisms benefit
- C. A relationship where neither organism benefits
- D. A relationship where one organism is unaffected

What is a galaxy?
- A. A cluster of planets
- B. A massive system of stars, gas, and dust
- C. A group of constellations
- D. A type of star

Which galaxy is Earth located in?
- A. Andromeda
- B. Whirlpool
- C. Milky Way
- D. Triangulum

What is a constellation?
- A. A type of galaxy
- B. A group of stars forming a pattern
- C. A single bright star
- D. A type of planet

What is the closest star to Earth?
- A. Alpha Centauri
- B. Polaris
- C. The Sun
- D. Betelgeuse

Which of the following is known as the North Star?
- A. Sirius
- B. Betelgeuse
- C. Polaris
- D. Vega

What is the universe?
- A. A large galaxy
- B. A collection of solar systems
- C. All existing matter and space
- D. A type of star cluster

Which constellation is known as “The Hunter”?
- A. Ursa Major
- B. Orion
- C. Cassiopeia
- D. Lyra

What is a supernova?
- A. A new star forming
- B. A black hole
- C. An explosion of a star
- D. A type of galaxy

What type of galaxy is the Milky Way?
- A. Elliptical
- B. Irregular
- C. Spiral
- D. Lenticular

Which constellation contains the Big Dipper?
- A. Orion
- B. Ursa Minor
- C. Ursa Major
- D. Canis Major

What is the parent rock of marble?
- A. Granite
- B. Limestone
- C. Sandstone
- D. Basalt

Which sedimentary rock is primarily composed of sand-sized particles?
- A. Shale
- B. Sandstone
- C. Limestone
- D. Granite

What type of rock is formed from volcanic activity?
- A. Sedimentary
- B. Igneous
- C. Metamorphic
- D. Clastic

Which rock is an example of a metamorphic rock?
- A. Obsidian
- B. Conglomerate
- C. Marble
- D. Limestone

What is the process called when sedimentary rocks are formed from accumulated material?
- A. Crystallization
- B. Lithification
- C. Metamorphism
- D. Erosion

Which rock is an example of an igneous rock?
- A. Sandstone
- B. Basalt
- C. Shale
- D. Gneiss

How are metamorphic rocks formed?
- A. By melting and cooling
- B. By deposition of mineral particles
- C. By transformation under heat and pressure
- D. By volcanic eruptions

What is an example of a sedimentary rock?
- A. Granite
- B. Marble
- C. Limestone
- D. Slate

How are igneous rocks formed?
- A. By cooling and solidification of magma or lava
- B. By accumulation and compression of sediments
- C. By heat and pressure on existing rocks
- D. By erosion and weathering

What are the three main types of rocks?
- A. Igneous, Sedimentary, Metamorphic
- B. Basalt, Granite, Limestone
- C. Hard, Soft, Brittle
- D. Volcanic, Plutonic, Organic

What is the gravitational pull of the Moon compared to Earth’s?
- A. About the same
- B. About twice as strong
- C. About one-sixth as strong
- D. About half as strong

What is the Moon primarily composed of?
- A. Iron and nickel
- B. Silicate rock and dust
- C. Ice and ammonia
- D. Gas and plasma

What phenomenon occurs when the Moon is closest to Earth in its orbit?
- A. Supermoon
- B. Blue Moon
- C. Blood Moon
- D. Harvest Moon

What is the dark, flat plain on the Moon’s surface called?
- A. Crater
- B. Maria
- C. Ridge
- D. Valley

Which mission was the first to land humans on the Moon?
- A. Apollo 11
- B. Apollo 13
- C. Voyager 1
- D. Luna 2

What is a lunar eclipse?
- A. When the Moon passes between the Earth and the Sun
- B. When the Earth passes between the Sun and the Moon
- C. When the Moon passes between two stars
- D. When the Moon is closest to the Earth

What is the term for when the Moon is completely illuminated as seen from Earth?
- A. New Moon
- B. Full Moon
- C. Crescent Moon
- D. Half Moon

How long does it take for the Moon to complete one orbit around the Earth?
- A. 7 days
- B. 14 days
- C. 27.3 days
- D. 365 days

What is the surface of the Moon covered with?
- A. Water
- B. Ice
- C. Lava
- D. Regolith

What is the primary cause of the Moon’s phases?
- A. The Earth’s rotation
- B. The Moon’s shadow
- C. The Moon’s orbit around Earth
- D. Solar flares

Which planet is closest to the Sun?
- A. Venus
- B. Earth
- C. Mercury
- D. Mars

What is the largest planet in our Solar System?
- A. Mars
- B. Earth
- C. Saturn
- D. Jupiter

Which planet is known for its prominent ring system?
- A. Uranus
- B. Neptune
- C. Saturn
- D. Jupiter

Which planet is known as the “Red Planet”?
- A. Venus
- B. Mars
- C. Jupiter
- D. Saturn

What is the smallest planet in our Solar System?
- A. Mars
- B. Venus
- C. Mercury
- D. Pluto

What is the main component of the Sun?
- A. Hydrogen
- B. Helium
- C. Carbon
- D. Oxygen

Which planet has the most moons?
- A. Earth
- B. Mars
- C. Jupiter
- D. Saturn

Which celestial body was reclassified as a “dwarf planet” in 2006?
- A. Ceres
- B. Eris
- C. Pluto
- D. Haumea

What is the Kuiper Belt?
- A. A ring of asteroids between Mars and Jupiter
- B. A region of icy bodies beyond Neptune
- C. A collection of comets near the Sun
- D. A region of gas and dust around the Sun

Which planet is known as the “Morning Star” or the “Evening Star”?
- A. Mercury
- B. Venus
- C. Mars
- D. Jupiter

What is the primary reason for Earth’s seasons?
- A. Earth’s distance from the Sun
- B. The tilt of Earth’s axis
- C. The shape of Earth’s orbit
- D. The rotation of Earth

Which planet is known for having a Great Red Spot?
- A. Saturn
- B. Mars
- C. Jupiter
- D. Neptune

What is the asteroid belt?
- A. A region of space with a high concentration of asteroids
- B. The outermost region of the Solar System
- C. A zone of gas and dust near the Sun
- D. A collection of comets orbiting the Earth

Which planet has the highest mountain and largest volcano in the Solar System?
- A. Earth
- B. Mars
- C. Venus
- D. Mercury

Which planet rotates on its side, with an axial tilt of about 98 degrees?
- A. Saturn
- B. Neptune
- C. Uranus
- D. Venus

What is the most abundant gas in Earth’s atmosphere?
- A. Oxygen
- B. Carbon Dioxide
- C. Nitrogen
- D. Hydrogen

Which planet is known for its extreme surface temperatures, both hot and cold?
- A. Mercury
- B. Venus
- C. Mars
- D. Neptune

What is the name of our galaxy?
- A. Andromeda Galaxy
- B. Milky Way Galaxy
- C. Triangulum Galaxy
- D. Whirlpool Galaxy

Which planet is the densest in our Solar System?
- A. Earth
- B. Jupiter
- C. Venus
- D. Saturn

What is the heliosphere?
- A. The region of space influenced by Earth’s magnetic field
- B. The bubble-like region of space dominated by the Sun’s solar wind
- C. The area between Mars and Jupiter
- D. The outer layer of the Sun

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