Science

Question 1

What is the closest planet to the sun?

Answer 1

Mercury

Question 2

The tendency of an object to resist change in motion is called?

Answer 2

Inertia

Question 3

Fossils are most often found in what kind of rocks?

Answer 3

Sedimentary

Question 4

Organisms that are in the same biological class must also be in the same?

Answer 4

Phylum

Question 5

The density of a liquid is commonly expressed using what units?

Answer 5

Milliliters

Question 6

What organism primarily regulates its internal body temperate by external means?

Answer 6

Butterfly

Question 7

In the food chain, animals that primarily graze on grass as their food source are?

Answer 7

Primary Consumers

Question 8

When light passes from the air into a glass lens, the light changes direction. This is known as:

Answer 8

refraction

Question 9

What is an example of a mineral?

Answer 9

Diamond

Question 10

The boundary where two air masses converge is called?

Answer 10

A front

Question 11

What is an example of a chemical change?

Answer 11

Cooking of an egg

Question 12

The DNA in an animal cell is found is what location?

Answer 12

Nucleus

Question 13

What is an example of an amphibian?

Answer 13

Salamander

Question 14

What is the most common gas in Earth’s atmosphere?

Answer 14

Nitrogen

Question 15

What is the order of the planets?

Answer 15

Mercury
Venus
Earth
Mars
Jupiter 
Saturn
Uranus
Neptune

Question 16

pH scale definition

Answer 16

From the range 7-14, a solution is basic.
Whenever the value of pOH is greater than 7, then it is considered basic.
At pH 7, the substance or solution is at neutral and means that the concentration of H+ and OH- ion is the same.
From the range 1-7, a solution is acidic. So, whenever the value of a pH is less than 7, it is considered acidic.

Question 17

What is the definition of an element?

Answer 17

An element is a substance consisting of atoms which all have the same number of protons - i.e. the same atomic number.
Elements are chemically the simplest substances and hence cannot be broken down using chemical methods. Elements can only be changed into other elements using nuclear methods.

Question 18

What is the definition of an amphibian?

Answer 18

any cold-blooded vertebrate of the class Amphibia, comprising frogs and toads, newts and salamanders, and caecilians, the larvae being typically aquatic, breathing by gills, and the adults being typically semiterrestrial, breathing by lungs and through the moist, glandular skin.

Question 19

What is the definition of natural selection?

Answer 19

the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

Question 20

What is the definition of a renewable energy resource?

Answer 20

Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geothermal heat.

Question 21

What is homeostasis?

Answer 21

the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.

Question 22

What is electrostatic attraction?

Answer 22

Electrostatic attraction is the attraction between atoms of opposite charge that holds the atoms together in ionic bonds.

Question 23

What is inertia?

Answer 23

the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force.

• resisting change!

Question 24

What are biotic factors?

Answer 24

Biotic factors are the living parts of an ecosystem—the animals, plants and microorganisms.

Question 25

What are abiotic factors?

Answer 25

Abiotic factors are the non living parts of an ecosystem.

Question 26

What is the nervous system?

Answer 26

the network of nerve cells and fibers that transmits nerve impulses between parts of the body.

Question 27

What is the immune system?

Answer 27

The immune system is the body’s defense against infectious organisms and other invaders. Through a series of steps called the immune response, the immune system attacks organisms and substances that invade body systems and cause disease.

Question 28

What is the respiratory system?

Answer 28

The respiratory system (or ventilatory system) is a biological system consisting of specific organs and structures used for the process of respiration in an organism. The respiratory system is involved in the intake and exchange of oxygen and carbon dioxide between an organism and the environment.

Question 29

What is the endocrine system?

Answer 29

The endocrine system refers to the collection of glands of an organism that secrete hormones directly into the circulatory system to be carried towards a distant target organ.

Question 30

What is photosynthesis?

Answer 30

the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Question 31

What is the process of photosynthesis?

Answer 31

Carbon Dioxide + Water + Light yields Glucose + Oxygen

Question 32

How do sound waves and pitch relate?

Answer 32

Humans perceive pitch based on the frequency of the sound wave that is detected by the ear. High-frequency sound waves have a high pitch; low-frequency sound waves have a low pitch.

Question 33

What is a biome?

Answer 33

Biomes are regions of the world with similar climate (weather, temperature) animals and plants.

Question 34

What is ecology?

Answer 34

Ecology is the relationship of living things to each other and to what’s around them.

Question 35

A chlorine compound is added to swimming pools in order to…

Answer 35

destroy bacteria through an oxidation reaction