Y8

Question 1

What is the purpose of respiration?

Answer 1

To release energy from food

Question 2

What is the word equation for aerobic respiration?

Answer 2

Glucose + oxygen → carbon dioxide + water

Question 3

Where in the cell does respiration happen?

Answer 3

Mitochondria

Question 4

What is anaerobic respiration?

Answer 4

Respiration without oxygen

Question 5

What waste product is made during anaerobic respiration in muscles?

Answer 5

Lactic acid

Question 6

What is the effect of exercise on breathing rate?

Answer 6

Increases to supply more oxygen

Question 7

What is the main difference between aerobic and anaerobic respiration?

Answer 7

Aerobic uses oxygen; anaerobic does not

Question 8

What is a property of a solid?

Answer 8

Fixed shape and volume

Question 9

What is a property of a liquid?

Answer 9

Fixed volume but takes the shape of its container

Question 10

What is the property of a gas?

Answer 10

No fixed shape or volume

Question 11

What type of change is melting?

Answer 11

Physical change

Question 12

What is an example of a chemical change?

Answer 12

Burning

Question 13

What is filtration used for?

Answer 13

Separating insoluble solids from liquids

Question 14

What is distillation used for?

Answer 14

Separating liquids based on boiling points

Question 15

What is a force?

Answer 15

A push or pull on an object

Question 16

What is the unit of force?

Answer 16

Newton (N)

Question 17

What is friction?

Answer 17

force that resists the sliding or rolling of one solid object over another

Question 18

What is air resistance?

Answer 18

A type of friction acting on objects moving through air

Question 19

What is elastic force?

Answer 19

Force in stretched or compressed objects

Question 20

What happens when balanced forces act on an object?

Answer 20

No change in motion

Question 21

What is an ecosystem?

Answer 21

A community of organisms interacting with each other and their physical environment

Question 22

What is a producer in an ecosystem?

Answer 22

An organism that makes its own food

Question 23

What is a consumer?

Answer 23

An organism that eats other organisms

Question 24

What is a decomposer?

Answer 24

An organism that breaks down dead material

Question 25

What does a food web show?

Answer 25

Feeding relationships between organisms

Question 26

What is biodiversity?

Answer 26

The variety of living organisms in an area

Question 27

What cycle describes water movement through the environment?

Answer 27

Water cycle

Question 28

What is evaporation?

Answer 28

Liquid water changing into gas

Question 29

What is condensation?

Answer 29

Gas turning into liquid

Question 30

What is precipitation?

Answer 30

Rain, snow, sleet, or hail falling to Earth

Question 31

What is the main greenhouse gas from human activities?

Answer 31

Carbon dioxide

Question 32

What is the carbon cycle?

Answer 32

The movement of carbon through living organisms and the atmosphere/environment

Question 33

What is reflection of light?

Answer 33

Bouncing of light off a surface

Question 34

What is refraction of light?

Answer 34

Bending of light when it passes between materials

Question 35

What type of mirror curves outward?

Answer 35

Convex mirror

Question 36

What type of mirror curves inward?

Answer 36

Concave mirror

Question 37

What does a convex lens do to light rays?

Answer 37

Brings them together (converges)

Question 38

What does a concave lens do to light rays?

Answer 38

Spreads them apart (diverges)

Question 39

What is a galaxy?

Answer 39

A system of stars, dust, and gas held together by gravity

Question 40

What is the name of our galaxy?

Answer 40

The Milky Way

Question 41

What type of galaxy is the Milky Way?

Answer 41

Spiral galaxy

Question 42

What is the center of a galaxy called?

Answer 42

Galactic core

Question 43

What are stars mostly made of?

Answer 43

Hydrogen and helium

Question 44

What are the main food groups needed for a balanced diet?

Answer 44

Carbohydrates, proteins, fats, vitamins, minerals, fiber, water

Question 45

What is the function of protein in the body?

Answer 45

Growth and repair

Question 46

What is the function of carbohydrates?

Answer 46

Provide energy

Question 47

What is malnutrition?

Answer 47

Lack of proper nutrition

Question 48

Why is fiber important in the diet?

Answer 48

Helps with digestion

Question 49

What is obesity?

Answer 49

Excessive body fat that may impair health

Question 50

What is an exothermic reaction?

Answer 50

A reaction that releases heat

Question 51

What is an endothermic reaction?

Answer 51

A reaction that absorbs heat

Question 52

What is combustion?

Answer 52

A chemical reaction with oxygen that releases heat and light

Question 53

What gas is needed for combustion?

Answer 53

Oxygen

Question 54

What happens during a thermal decomposition reaction?

Answer 54

A substance breaks down when heated

Question 55

What is magnetism?

Answer 55

A force that attracts certain materials like iron

Question 56

What are magnetic materials?

Answer 56

Iron, cobalt, nickel

Question 57

What are the two poles of a magnet?

Answer 57

North pole and south pole

Question 58

What happens when two like poles are brought close together?

Answer 58

They repel

Question 59

What happens when opposite poles are brought close together?

Answer 59

They attract

Question 60

What are biotic factors

Answer 60

Living part of the environment: eg. amount of food, amount of predators, etc

Question 61

What are abiotic factors

Answer 61

Non-living part of the environment: temperature, wind speed, amount of light, etc

Question 62

What is bioaccumulation

Answer 62

Build up of toxins or pollutants in an organism

Question 63

What is biomagnification

Answer 63

Increase of toxins in an organism the higher you go up the food chain