Energy Transfers

Question 1

What is meant by energy transfers

Answer 1

Energy transfers describe how energy is transferred from one store to another

Question 2

How is energy transferred

Answer 2

Mechanically

By Light and Sound

Electrically

By heating

Question 3

What is meant by transferring energy mechanically

Answer 3

When a force makes something move.

Eg. An object is pushed, pulled, stretched or squashed (so when the motion or position of an object changes)

If an object is dropped, it moves through a gravitational field and this causes energy to transfer from a gravitational potential energy store to its kinetic energy store

Question 4

What is meant transferring energy by light or sound

Answer 4

When light or sound waves carry energy from one place to another.

For example, light bulbs, candle flames, microwaves, talking, music, radio

Question 5

What is meant by transferring energy electrically

Answer 5

When electric charges move around an electric circuit.

Eg a simple circuit may consist of a battery, lamp and wires. Internal energy stored in the battery is transferred to moving charges particles in the wire.

Question 6

What is meant by transferring energy by heating

Answer 6

When energy is transferred from hotter objects to colder objects.

How?

Through conduction or radiation