➽ ENERGY - Energy adds up

Question 1

What is the law of conservation of energy?

Answer 1

No energy can be created or destroyed, only transferred. The total amount of energy stays the same before and after a change/process.

Question 2

What are the 5 energy stores?

Answer 2

1. Chemical
2. Thermal
3. Kinetic
4. Gravitational potential
5. Elastic

Question 3

What is the chemical store related to?

Answer 3

Food, fuels and batteries

Question 4

What is the thermal store related to?

Answer 4

Hot objects/Heat

Question 5

What is the kinetic store related to?

Answer 5

Moving objects

Question 6

What is the gravitational potential store related to?

Answer 6

Height of an object

Question 7

What is the elastic store related to?

Answer 7

Stretched or squashed objects

Question 8

What are the 3 ways we can observer energy transfer?

Answer 8

1. Electric current
2. Light
3. Sound

Question 9

What is dissipated energy?

Answer 9

Energy that is wasted; it is transferred to an unwanted store. E.g. a car engine heating up as energy is transferred to the thermal store of the car.

Question 10

What allows things to occur?

Answer 10

Forces, NOT energy. Energy reveals what processes are possible but doesn’t cause them:
e.g. energy from fuels can allow a car to drive but its the force from the engine that actually moves the car.