Science 8

Question 1

What is the primary gas found in the atmosphere of Mars?

Answer 1

Carbon Dioxide (CO2), about 95% of Mars’ atmosphere.

Question 2

How many bones are in the adult human body?

Answer 2

206 bones.

Question 3

What causes ocean tides on Earth?

Answer 3

The gravitational pull of the moon and the sun on Earth’s oceans.

Question 4

Name the three types of rock in the rock cycle.

Answer 4

Igneous, sedimentary, and metamorphic.

Question 5

What is the powerhouse of the cell known as?

Answer 5

Mitochondria.

Question 6

What is the term for the amount of matter in an object?

Answer 6

Mass.

Question 7

Which element has the highest electrical conductivity?

Answer 7

Silver.

Question 8

What is the common name for dihydrogen monoxide?

Answer 8

Water (H2O).

Question 9

What gas do plants absorb from the atmosphere for photosynthesis?

Answer 9

Carbon Dioxide (CO2).

Question 10

What is the pH value of pure water at room temperature?

Answer 10

Approximately 7, neutral.

Question 11

What is the measure of the total amount of energy in a system called?

Answer 11

Internal energy.

Question 12

Name the largest planet in our solar system.

Answer 12

Jupiter.

Question 13

What is the effect of a force applied at a distance from an axis of rotation called?

Answer 13

Torque.

Question 14

What type of celestial body is the Sun?

Answer 14

A star.

Question 15

What is the name of the process by which plants lose water through their leaves?

Answer 15

Transpiration.

Question 16

What is the term for a material that allows heat or electricity to pass through it easily?

Answer 16

Conductors.

Question 17

What force keeps the planets in orbit around the Sun?

Answer 17

Gravity.

Question 18

What is the primary component of the Earth’s core?

Answer 18

Iron.

Question 19

Which organ in the human body is responsible for filtering blood?

Answer 19

Kidneys.

Question 20

What type of bond is formed by the sharing of electron pairs between atoms?

Answer 20

Covalent bond.

Question 21

What is the term for the change of a substance from a solid to a gas without passing through the liquid phase?

Answer 21

Sublimation.

Question 22

Name the particle in an atom that has a positive charge.

Answer 22

Proton.

Question 23

What is the term used to describe the study of heredity and the variation of inherited characteristics?

Answer 23

Genetics.

Question 24

What is the name given to the first law of thermodynamics?

Answer 24

The Law of Conservation of Energy.

Question 25

What phenomenon explains the bending of light when it passes from one medium to another?

Answer 25

Refraction.