Describing Changes In Energy Stores

Question 1

How do you describe changes in energy stores? (3)

Answer 1

1. Identify an energy store
2. Identify an object’s energy store(s)
3. Explain how it changes

Question 2

A match is lit.
Describe the changes in the energy stores as the match burns

Answer 2

As the match burns, the chemical energy store of the match decreases. The chemical energy is transferred by radiation to its thermal energy store and its surroundings.

Question 3

Describe the changes in energy stores when a runner runs

Answer 3

The chemical energy store in the runner’s muscles decreases and is transferred mechanically to the kinetic energy store. Work is done by friction between the runner’s shoes and the ground, which is dissipated into the thermal energy store and the surroundings.