1)What does the law of conservation of energy state?

Energy cannot be created or destroyed, only transferred or stored.

2) What energy transfer happens in hydroelectric power?

Gravitational potential energy → electrical energy.

3)What energy transfer happens in solar panels?

Light energy → electrical energy

4)What energy transfer happens in wind turbines?

Kinetic energy → electrical energy.

5)What causes tidal energy?

The gravitational pull of the Moon (and Sun)

6) What is an advantage of renewable energy?

Renewables do not produce carbon dioxide that causes global warming.

7) Are fossil fuels renewable or non-renewable?

Non-renewable

8)What gases do fossil fuels produce?

Greenhouse gases such as carbon dioxide

9) What will eventually happen to fossil fuels?

They will run out

10)What fuels are used in nuclear fission?

Uranium and plutonium.

11)Is nuclear power renewable?

No, it is non-renewable.

12)Give one advantage of nuclear power.

Produces lots of energy with very little carbon dioxide.

13)Give one disadvantage of nuclear power.

Produces radioactive waste.

14)What is the kinetic energy equation?

Kinetic energy = ½ × mass × velocity²

15)What does kinetic energy depend on?

Mass and velocity (speed).

16)What unit is energy measured in?

Joules (J).

17)What happens to kinetic energy when speed increases?

Kinetic energy increases.

18)What is the gravitational potential energy equation?

GPE = mass × gravity × height

19)What is the power equation?

Power = energy ÷ time

20)What unit is power measured in?

Watts (W).

21)What is the elastic potential energy equation?

Elastic potential energy = ½ × spring constant × extension²

22)What is heat energy also called?

Thermal energy.

23)Why are renewables better for the environment?

They produce little or no greenhouse gases.

24)Why is nuclear power reliable?

It does not depend on weather conditions.