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Science Pisay Flashcards

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1
Q

Which of the following is an observation?
A. A substance emits smoke because it is hot
B. The chocolate drink tastes bitter
C. Scientists agree that global warming is happening
D. Water is composed of hydrogen and oxygen atoms.

A

B

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2
Q

Which of the following methods must be used to recover the salt from brine solution
A. Pour the solution through the strainer to remove the salt from the liquid
B. Boil the solution until all liquid has evaporated
C. Transfer the solution to another container using a stirring rod
D. Use a distillation setup to recover the pure solvent

A

B

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3
Q

An example of a heterogeneous mixture is
A. Brine
B. 70% rubbing alcohol
C. Pollen dust in air
D. Instant coffee in hot water

A

C

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4
Q

Ramon was assigned to determine whether the colorless liquid is a substance or a solution. He observed that the liquid started to boil at 85°C and continued boiling at 100 °C. Ramon concluded that
A. The liquid is a substance
B. The liquid is a solution
C. The liquid is water
D. The amount of liquid is not enough

A

B

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5
Q

Which of the following is a quantitative description?
A. In the math class, there are more girls than boys
B. There are thick books on the table
C. There are just enough chairs in the classroom
D. There are two sets of computers in the classroom

A

D

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6
Q

To be in equilibrium an object
A. Must be accelerating
B. Must have no forces acting on it
C. Must have no unbalanced force acting on it
D. Must have no inertia

A

C

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7
Q

An object at rest may have
A. Speed
B. Velocity
C. Acceleration
D. Energy

A

D

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8
Q

A rock sample taken from the moon was analysed by the scientists of NASA. What property of the rock will not be the same in the moon and earth
A. Mass
B. Weight
C. Size
D. Shape

A

B

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9
Q

A constant force is needed to keep a car moving along a horizontal surface at a uniform velocity. This means that
A. The car has inertia
B. The car has weight
C. The friction forces acting on the car are equal to the force applied
D. The friction acting on the car are less than the force applied

A

C

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10
Q

A truck starts from rest and moves along a straight road. Every minute its speed increases by 10 meters per minute. This indicates that the truck travels with
A. Decreasing speed
B. Constant acceleration
C. Constant velocity
D. Increasing acceleration

A

B

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11
Q

Saltwater is denser than freshwater. A person loads up a boat in a freshwater river and sails down the river towards the sea. When the boat reaches the saltwater
A. It will sink deeper into the water
B. It will float a little higher in the water
C. The volume of water displaced by the boat will increase
D. The amount displaced by the boat will remain the same

A

B

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12
Q

Nikki filled up a 1.0- liter jar with sea shells. Next she filled it with water up to the brim. When she measured the amount that was added she found out that it is 350.0 mL. What does 350.0 mL represent
A. The actual volume of the sea shells
B. The volume of air spaces in the jar
C. The density of the sea shells
D. The volume of the sea shells minus the volume of air spaces

A

B

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13
Q

It takes a certain amount of time for starlight to travel from the star to the earth. When you look back at the light from the distant stars, you are actually looking back in time. Which of the following statements explains the meaning of this?
A. The star that we see now is the same star at the time of its birth
B. The star that we see now does not exist anymore.
C. The star that we observe now is as it appeared when light was emiited
D. The star that we observe now shows it present properties.

A

C

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14
Q

If a round ball X were rolled across a smooth floor to collide with a similar ball Y that was stationary, which of the following is most likely to happen?
A. Both balls will gain kinetic energy.
B. Ball X will increase its kinetic energy while ball Y will decrease it
C. The kinetic energy of both balls will remain the same
D. Ball X’s kinetic energy will decrease while ball Y’s will increase

A

D

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15
Q

Which process results in the release of latent heat?
A. Melting of ice
B. Heating of liquid water
C. Condensation of water vapor
D. Evaporation of water

A

C

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16
Q

What happens when a stone drops to the ground without friction
A. Its kinetic energy is conserved
B. It’s gravitational potential energy is conserved
C. Its kinetic energy is converted to gravitational potential energy
D. There is no change in it’s total energy

A

D

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17
Q

Before it can be used, solar energy must be converted to other forms of energy because it is
A. Spread out over a wide area
B. Not available at night
C. Received mostly in the form of light
D. Too hot to handle

A

A

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18
Q

Joseph was not feeling well. When his mother took his body temperature, it measured 98°. He did not have a fever. What temperature scale were they using
A. Mercury
B. Celsius
C. Fahrenheit
D. Kelvin

A

C

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19
Q

Which of the following is an endothermic reaction?
A. Cold water turns to steam
B. Iodine gas sublimates
C. Water vapor liquifies
D. CO2 gas becomes dry ice

A

A

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20
Q

One of the causes of fish kill in a lake is acidic deposition. Which of the following substances could be added to neutralize the lake without harming the fish?
A. Vinegar
B. Table salt
C. Limestone
D. Acetone

A

C

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21
Q

The frequency of electromagnetic radiation is the number of waves that pass a point in a specific amount of time. If blue light has longer wavelength than violet light, and red light has longer wavelength than blue light which of the three has the highest frequency?
A. Blue light
B. Red light
C. Violet light
D. They have the same frequency

A

C

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22
Q

Relative humidity is the percentage of moisture the air holds relative to the amount it could hold at a particular temperature. If, at a certain temperature, 1.0 kg of air can hold as much as 12 g of water vapor but is actually holding 9 g of it. The relative humidity of air at that temperature would be (9/12) x 100 = 75%. If 1.0 kg of air can hold 15 g of water vapor but actually holds only 10 g, what is the relative humidity?

A. 67%
B. 57%
C. 15%
D. 25%

A

B

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23
Q

In which of the following conditions is the net force zero?

A. A body moves at constant speed around a circle.
B. A body moving along a straight line slows down.
C. A body moves at constant speed along a straight line.
D. A freely falling body

A

C

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24
Q

Photosynthesis is one of the most important chemical reactions performed by nature. Its chemical reactants are

A. glucose and oxygen.
B. carbon dioxide and glucose.
C. carbon dioxide and water.
D. glucose and sunlight.

A

C

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25
Q

All of the following exhibit chemical changes except:

A. Milk left uncovered curdles.
B. Water droplets form on a cold glass.
C. Green mango turns yellow.
D. The silver earrings tarnish.

A

B

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26
Q

A powdered material is mixed with water. Particles of yellow solid float on the surface while gray solid particles sink to the bottom. The yellow particles are skimmed off and the liquid is poured off to get the gray particles. The property that explains why the two solids separated is:

A. density.
B. solubility.
C. decantation.
D. filtration.

A

A

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27
Q

With the very large amount of air pressing on us, our body is not flattened or crushed. This is so because

A. we are surrounded by very light air.
B. our body is supported by strong bones.
C. our body fluids oppose the pressure.
D. the pressure is distributed all over the body.

A

D

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28
Q

A bag of iron and a bag of chicken feathers were weighed separately. Both were found to have the same weight. This indicates the bags have the same

A. mass.
B. volume.
C. density.
D. size.

A

A

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29
Q

Which of the following statements describes an intensive property of matter?

A. The height of the tree is 1.8 m.
B. 24 karat gold is very malleable.
C. The boy weighs 43.8 kg.
D. One cup of milk measures 300 mL.

A

B

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30
Q

In a controlled experiment, a comparison of tests is possible because two sets of tests are

A. identical, but carried out under totally different conditions.
B. identical, except in one set of factors or one condition.
C. identical, but carried out at different times.
D. identical, except in their outcome.

A

B

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31
Q

Which of the following statements make an observation reliable?

A. It must be a first observation.
B. It is made through the use of an instrument.
C. It reflects the experience of the observer.
D. It is an experience that can be repeated.

A

D

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32
Q

Potassium is a metallic element that melts at 64°C and boils at 774°C. What is the physical state of the metal at 70°C?

A. Solid
B. Liquid
C. Gas
D. Cannot be determined from the given information.

A

B

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33
Q

A student wants to find out whether a certain liquid is acidic. Which of the following procedures would tell him whether or not it is so?

A. Determine its boiling point.
B. Taste to find out if it is sour or not.
C. Use the litmus paper test.
D. Add salt and water.

A

C

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34
Q

Which of the following would happen when an acid is slowly poured to a basic solution?

A. Bubbles would form.
B. The pH of the basic solution would increase.
C. The pH of the acid would increase.
D. The color of the mixture would change.

A

C

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35
Q

Air is a mixture of different gases, the most abundant of which is

A. Carbon dioxide.
B. Nitrogen.
C. Oxygen.
D. Argon.

A

B

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36
Q

A molecule of glucose is represented by the formula C₆H₁₂O₆. How many elements are present in this substance?

A. 3
B. 6
C. 12
D. 24

A

A

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37
Q

Study the chemical equation shown below:

2H₂O → 2H₂ + O₂
electricity
Which of the following statements about the equation is NOT correct?

A. Water is the reactant in this chemical reaction.
B. Hydrogen and oxygen are the products.
C. This shows a composition reaction.
D. Electricity is applied in the reaction.

A

C

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38
Q

To eliminate pathogenic organisms, milk is heated at 60°C, and then cooled rapidly. This process has saved a lot of lives, and is known as

A. fermentation.
B. preservation.
C. inoculation.
D. pasteurization.

A

D

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39
Q

Fruits and vegetables last longer when placed in the refrigerator. What explains this fact?

A. Low temperature slows down chemical reactions.
B. Low temperature speeds up chemical reactions.
C. Refrigerators are used to preserve food.
D. Refrigerators inhibit the production of enzymes.

A

A

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40
Q

If all types of microorganisms were removed from a body of freshwater, which of the following would most likely occur?

A. Fishes and plants would grow abundantly.
B. Water becomes safe for drinking and bathing.
C. Water-borne diseases would be minimized.
D. Organic wastes in the water would not be decomposed.

A

D

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41
Q

Which of the following organs/structures is not considered an endocrine gland?

A. Thyroid
B. Gall bladder
C. Testis
D. Islets of Langerhans

A

B

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42
Q

In the female human, testosterone is secreted by the

A. Ovaries.
B. Adrenals.
C. Uterus.
D. Pancreas.

A

A/B

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43
Q

The human body normally responds to the high concentration of sugar in the blood by secreting

A. Insulin.
B. Glucagon.
C. Estrogen.
D. Bile.

A

A

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44
Q

The hypothalamus in the brain plays a very important role for homeostasis. This means that

A. it is associated with spatial perception and musical ability of humans.
B. it plays an important role in reproduction.
C. it regulates body temperature and responses, and controls emotions.
D. it distributes oxygen throughout the body.

A

C

45
Q

In this type of cell, the lower concentration outside the cell can cause water to diffuse into the cell causing it to swell. It is called

A. Hypertonic.
B. Hypotonic.
C. Isotonic.
D. Ipotonic.

A

B

46
Q

Studies show that people who live close to major airports are most likely to complain about

A. urban heat islands.
B. air pollution.
C. sound pollution.
D. increased radioactivity.

A

C

47
Q

Which of the following best illustrates the principle of division of labor among members of a population?

A. A school of fish
B. A field of sugar cane
C. A hive of bees
D. A flock of birds

A

C

48
Q

________ allows water to rise in a cylindrical tube with a very small diameter. It helps plants to survive by distributing water from the roots to its stems and leaves.

A. Polarity
B. Adhesion
C. Absorption
D. Capillarity

A

D

49
Q

Organisms that are capable of producing their own food are called

A. Autotrophs.
B. Heterotrophs.
C. Consumers.
D. Herbivores

A

A

50
Q

The following are heterotrophs except

A. tigers.
B. frogs.
C. cyanobacteria.
D. man.

A

C

51
Q

Greenhouse gases absorb and re-emit infrared radiation making the Earth warmer than it otherwise would be. These natural greenhouse gases are

A. Carbon dioxide, water vapor and methane.
B. Water vapor, ozone and nitrogen.
C. Carbon dioxide, methane and oxygen.
D. Chlorofluorocarbons and hydrogen.

A

A

52
Q

Enhanced greenhouse effect** is caused by the increased concentration of greenhouse gases in the atmosphere, mostly due to manmade processes. It is also known as

A. climate change.
B. global warming.
C. solar radiation.
D. sea level rise.

A

B

53
Q

As many countries become more industrialized, the concentration of greenhouse gases in the atmosphere has been steadily increasing. This may cause

A. Sea level rise.
B. Ice caps to melt.
C. Weather patterns to change.
D. All of the above.

A

D

54
Q

Carbon monoxide is a colorless, odorless gas that is very toxic to humans and other animals, even at very low concentrations. It is chemically different from carbon dioxide, which our body can tolerate at very low concentrations. The formulas of carbon monoxide and carbon dioxide are

A. C and CO.
B. CMO and CDO.
C. CO and CO₂.
D. CO₂ and COO.

A

C

55
Q

Although ozone is a toxic substance, it is important because it absorbs UV-B radiation and protects us from too much UV exposure. The highest concentration of ozone in the atmosphere is found in the

A. Lithosphere.
B. Stratosphere.
C. Deepest sea.
D. Ionosphere.

A

B

56
Q

High-level radioactive wastes are difficult to dispose of because

A. They take up too much space.
B. They have long half-lives.
C. They have short half-lives.
D. They disintegrate easily.

A

B

57
Q

In the post-World War II era, nuclear energy is primarily used

A. in nuclear bombs.
B. as a source of electricity.
C. as a major water source.
D. in creating dams and mines.

A

B

58
Q

Fishkills happen in bodies of water polluted by garbage. Decaying garbage can

A. decrease the amount of carbon dioxide in water.
B. consume the nutrients needed by the fish.
C. produce food for algae.
D. use up much of the dissolved oxygen needed by the fish.

A

D

59
Q

Four samples of polluted water were obtained from different sources. The pH of the samples are as follows:

Arrange the samples in the order of decreasing acidity.

A. 4, 3, 2, 1
B. 4, 1, 2, 3
C. 1, 3, 2, 4
D. 1, 2, 3, 4

Sample | pH |
|——–|—–|
| 1 | 5.3 |
| 2 | 8.5 |
| 3 | 7.5 |
| 4 | 12.0|

A

C

60
Q

In which situation does the concept of chemical bonding appear to be negligible?

A. Food dye spreads out in water.
B. Scissors are used to cut paper.
C. Detergents remove grease from cloth.
D. The flavour of vanilla is easily detected.

A

B

61
Q

One of the more successful international agreements which the Philippines is a signatory to is the Montreal Protocol. It was created in 1987 and sought to protect the ozone layer from depletion. The Protocol controlled and banned the production of

A. greenhouse gases.
B. persistent organic pesticides.
C. radioactive materials.
D. Chlorofluorocarbons.

A

D

62
Q

Which of the following energy resources do not depend ultimately on solar energy?

A. Nuclear energy
B. Coal
C. Natural gas
D. Hydroelectric power

A

A

63
Q

Why do some solar devices have blackened surfaces?

A. To absorb more heat
B. To control convection
C. To consume more energy
D. To conduct more heat

A

A

64
Q

Electrical energy is used to power a lamp. If the lamp is 90% efficient, the amount of light energy produced is ___ the amount of electrical energy used.

A. more than
B. less than
C. equal to
D. more or less equal to

A

B

65
Q

Selena wears a dress that looks green in white light. Which of the following is true?

A. The green part of the light is reflected while all the other colors are absorbed.
B. Only the green part of the light is absorbed.
C. The dress gives off only its own green light.
D. The dress absorbs most of the white light and turns most of it into green light.

A

A

66
Q

It will be impossible for two astronauts to communicate in space by shouting at each other. What is the reason for this?

A. The temperature is too high in space.
B. Air pressure is too high in space.
C. There is no air so sound cannot travel.
D. The spaceship moves at high speed.

A

C

67
Q

At room temperature, the particles in _________ move the fastest.

A. vanilla ice cream
B. cooking oil
C. perfume
D. ceramic plate

A

C

68
Q

Given two balloons of the same make and size, one contained 22.4 L of argon (Ar), the other contained the same amount of oxygen (O₂). At room temperature, the balloons were untied. Which gas effused (passed through the hole) faster?
(Atomic Mass of Element: Ar = 18 amu O = 16 amu)

A. Ar.
B. O₂.
C. Both gases effused at the same time.
D. The gases were not released.

A

A

69
Q

Which of the following statements explains why aerosol cans must not be disposed of in fire?

A. The heat will cause the gas particles to compress until they become very close and turn the gas into liquid.
B. The heat will cause the gas particles to expand freely. If the walls of the container are weak, this can cause gas to leak.
C. The fire will melt the can and cause gas to leak.
D. The heat will increase the kinetic energy of the gaseous particles and cause them to bump into each other.

A

B

70
Q

When a steel bar is heated,

A. it gains mass.
B. it gains more particles.
C. its particles’ kinetic energy increases.
D. its particles increase in size.

A

C

71
Q

Which of the following properties cannot be used to describe metals?

A. Ductile
B. Malleable
C. High melting point
D. Poor thermal conductor

A

D

72
Q

For questions 77–78, use the following data:

Four solutions A, B, C, and D have the following pH values, respectively: 12, 9, 7, 3.

  1. Which of these solutions is acidic?

A. 12
B. 9
C. 7
D. 3

A

D

73
Q

For questions 77–78, use the following data:

Four solutions A, B, C, and D have the following pH values, respectively: 12, 9, 7, 3.

  1. Which solutions can be mixed to form a neutral solution?

A. A and D
B. B and D
C. C and D
D. A and C

A

B

74
Q

The Philippine Eagle is an endangered species. Which of the following factors limit the growth of its population?

A. Frequent typhoons
B. Cross breeding
C. Migration
D. Deforestation

A

D

75
Q

The concentrations of carbon dioxide and oxygen in the atmosphere are kept relatively constant because of two natural processes known as photosynthesis and

A. circulation.
B. aerobic respiration.
C. homeostasis.
D. capillary action.

A

B

76
Q

In ecological relationships, one species affects other species in different ways. In the earthworm-chick-hawk relationship, the chick is: the earthworm while to the hawk, it is the ____.

A. prey, predator
B. producer, consumer
C. predator, prey
D. autotroph, heterotroph

A

C

77
Q

In a rice field, the population of rats usually drops after harvest time. In this case, the limiting factor to population growth is

A. predators.
B. food supply.
C. sunlight.
D. water.

A

B

78
Q

Decreasing forest cover results in many environmental problems; foremost of these is

A. Conversion to agricultural land.
B. Flooding in forestland.
C. Less income for wildlife hunters.
D. Greater erosion and floods.

A

D

79
Q

All of the following contribute to maintaining ecological balance EXCEPT

A. biodiversity conservation.
B. complex food web.
C. frequent use of herbicides.
D. sustainable use of resources.

A

C

80
Q

Light exhibits both particle and wave properties. Light, as a particle, consists of units of energy called

A. Electrons.
B. Ions.
C. Protons.
D. Photons.

A

D

81
Q

When light strikes an object, it may be absorbed, reflected, or transmitted. In white objects,

A. light is transmitted.
B. light is absorbed.
C. light is reflected.
D. light is bent.

A

C

82
Q

The pigment in plants, algae, and some bacteria that captures sunlight and allows them to undergo photosynthesis is chlorophyll. Leaves are colored green because:

A. chlorophyll does not absorb green light but reflects it.
B. chlorophyll is transparent to green light.
C. chlorophyll produces glucose that is the food of plants.
D. chlorophyll absorbs green light and bends it.

A

A

83
Q

White light that is passed through a prism is bent and is separated into different bands of color of red, orange, yellow, green, blue, and violet. The color with the longest wavelength is

A. Yellow.
B. Green.
C. Blue.
D. Red.

A

D

84
Q

Carbon sinks” are important because they absorb atmospheric carbon dioxide and help prevent the earth’s temperature from rising. Which of the following is a major carbon sink?

A. A limestone mine in Quezon province
B. The Amazon forests in Brazil
C. Maria Cristina Falls’ hydroelectric power plant
D. A coal mine in China

A

B

85
Q

There are more than 110 chemical elements known to man. The most abundant elements that are found in the human body are:

A. copper, calcium, and carbon.
B. sodium, potassium, and oxygen.
C. nitrogen, phosphorus, and oxygen.
D. nitrogen, phosphorus, and potassium.

A

C

86
Q

In the modern periodic table, the chemical elements are arranged in the order of increasing atomic number. The element with the lowest atomic number is

A. Sodium.
B. Carbon.
C. Boron.
D. Hydrogen.

A

D

87
Q

In the modern periodic table, the chemical elements are arranged in the order of increasing atomic number. The element with the lowest atomic number is

A. Sodium.
B. Carbon.
C. Boron.
D. Hydrogen.

A

D

88
Q

Isotopes are atoms of the same element that have different atomic masses. The chemical formulas for two isotopes of oxygen are O-16 and O-18. These tell us that:

A. O-16 and O-18 are different elements.
B. O-16 and O-18 have the same number of protons and neutrons.
C. O-18 has the same number of protons but different number of neutrons.
D. O-16 and O-18 have the same number of protons but different number of neutrons.

A

D

89
Q

Table sugar has the chemical formula C₁₂H₂₂O₁₁. To which food group does it belong?

A. Proteins
B. Carbohydrates
C. Fats and Lipids
D. Vitamins and minerals

A

B

90
Q

For many years now, the world uses the SI units of measurement. What is the SI unit for pressure?

A. pascal
B. millimeter Hg
C. pound
D. atmosphere

A

A

91
Q

In which of the following is the use of significant figures applicable?

A. The total number of cars using the North Luzon Expressway in a day
B. Your weight in kilograms
C. The number of days in the month of February during a leap year
D. The number of sheets in a Grade 6 pad paper

A

B

92
Q

The complete combustion of methane, CH₄, yields two compounds. These are

A. carbon and oxygen.
B. carbon dioxide and water.
C. carbon and hydrogen.
D. carbon dioxide and oxygen.

A

B

93
Q

Sodium bicarbonate, NaHCO₃, is commonly known as the very useful baking soda. When added to vinegar, bubbles are produced. What are these bubbles made of?

A. Oxygen
B. Water
C. Carbonate
D. Carbon dioxide

A

D

94
Q

Water has properties that make it a unique substance. Unlike other liquids, the density of water decreases when it freezes. This property

A. allows ice to float instead of sink in frozen lakes.
B. compresses frozen water in plastic bottles.
C. makes water a good liquid for drinking.
D. gives off oxygen to aquatic organisms.

A

A

95
Q

For numbers 99 and 100, consider the following information about three solids X, Y, and Z:

At room temperature, the mass of X is ½ that of Y, and the mass of Z is twice that of X.
They have the same volume.

  1. How do the densities of Y and Z compare?

A. Y = Z
B. Y > Z
C. Y < Z
D. Cannot be determined due to insufficient information

A

A

96
Q

For numbers 99 and 100, consider the following information about three solids X, Y, and Z:

At room temperature, the mass of X is ½ that of Y, and the mass of Z is twice that of X.
They have the same volume.

  1. How do the kinetic energies of X, Y, and Z compare?

A. X < Y < Z
B. X > Y > Z
C. X = Y = Z
D. Cannot be determined due to insufficient information

A

C

97
Q

The earth’s climate has changed due to many natural causes. Which of the following is not a natural cause of climate change?

A. Changes in solar output
B. Burning gasoline
C. Volcanic eruptions
D. None of the above

A
98
Q

The greenhouse effect regulates the earth’s temperature. It is a natural process that is important to life on earth. Without the greenhouse gases, the earth will be a very cool planet. Which of the following is NOT a process that adds to the greenhouse effect?

A. Incoming solar radiation passes through the greenhouse gases in the atmosphere.
B. Much shortwave radiation (ultraviolet) is absorbed by the earth’s surface heating it up.
C. Greenhouse gases absorb longwave radiation (infrared) emitted from the warmed surface.
D. Clouds reflect shortwave radiation lowering atmospheric temperature.

A
99
Q

Burning fossil fuels is considered the major cause of global warming, which is the enhanced greenhouse effect. Fossil fuels contain hydrocarbons which, when burned, produce

A. carbon dioxide, water and methane
B. carbon dioxide, water, and other gases
C. carbon dioxide and nitrogen oxide
D. carbon dioxide and carbon monoxide

A
100
Q

A Philippine Science High School scholar acquires skills that he/she developed in the scientific method. Which of the following is NOT a part of the scientific method?

A. Collecting data he/she has gathered
B. Asking questions about what he/she observed
C. Using his/her senses to observe his/her surroundings
D. Experimenting and drawing conclusions

A
101
Q

If the pull of gravity between the earth and moon increases, how will this affect tides on earth?

A. There will be no change.
B. High tides will be higher, and low tides lower.
C. High tides will be lower, low tides higher.
D. More high tides and low tides within the day.

A

B

102
Q

What do sound waves and ocean waves have in common?

A. Both have troughs and crests.
B. Both have the same frequency.
C. Both have the same sources of energy.
D. They have nothing in common

A
103
Q

Some motor oils are manufactured to lessen the effect of temperature on viscosity. Which of the following statements is true about the viscosity of motor oils?

A. With higher viscosity, the oil lubricates better in cold weather.
B. The lower the viscosity, the oil lubricates better in cold weather.
C. The higher the viscosity, the motor oil becomes easier to use.

A
104
Q

Concrete is not a natural rock. How can it become part of the rock cycle?

A. By heating and compressing to change its size and form.
B. By pulverizing and covering it with sand and clay.
C. By subjecting it to the processes of the rock cycle.
D. By pulverizing and subjecting it to weathering agents

A
105
Q

Which of the following is not a part of the rock cycle?

A. Erosion
B. Weathering
C. Buoyancy
D. Cementation

A
106
Q

Which of the following does not belong to the group?

A. Compact bone
B. Spongy bone
C. Ligament
D. Bone marrow

A
107
Q

Which of the following does not belong to the group?

A. Cardiac muscle
B. Ligament
C. Cartilage
D. Joint

A
108
Q

At any given time, several forces may act upon an object. When there is an unbalanced force in one direction, _____.

A. the object accelerates
B. the object reacts in the opposite direction
C. the object counteracts the force by friction
D. the object pushes against the force

A

C

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