Transferring Energy

Question 1

True or false? Energy can be created but not destroyed.

Answer 1

False

Conservation of energy states that energy is never created OR destroyed

Question 2

Give three ways in which energy can be transferred.

Answer 2

E.g. energy can be transferred mechanically, electrically, or by heating

Question 3

What is meant by a system?

Answer 3

A system is an object or a group of objects

Question 4

In a closed system, how do energy transfers affect the total energy of the system?

Answer 4

In a closed system, energy transfers have no effect on the total energy of the system

Question 5

Describe the energy transfers that take place when water is heated in an electric kettle. Name the energy stores that are involved.

Answer 5

Energy is transferred electrically to the thermal energy store of the kettle’s heating element, which transfers energy by heating to the water’s thermal energy store.