A store of energy describes the different ways in which energy can be stored.

An object’s surroundings include everything that is around it.

An energy transfer takes place when the amount of energy in some stores decreases and increases in others.

Transferring energy

Science

What forces do

The different kinds of force

Measuring forces

Using force arrows

Balanced and unbalanced forces

Friction

Reducing friction: practical

Reducing friction: analysis

Energy

In the Hidden forces unit, they will build on this knowledge to learn about turning forces, forces that hold objects on a surface, and those that make some objects float.

In primary science, pupils learnt that air resistance, water resistance and friction push back against moving objects. 

This unit focuses on quantifying and comparing energy transfers in different processes, such as motion changes, electrical circuits, and fuel burning. It examines forces as interactions between objects, using diagrams and measurements, including contact and non-contact forces.

Forces

When energy moves from one store to another, this is called an energy ...

Only one of these statements about energy is true and the other two are false. Choose the correct statement.

Which energy store do 'the surroundings' around an object always have?

friction and drag forces act (in the opposite direction).

the surroundings are at a lower temperature.

a gravitational force acts downwards (in the opposite direction).

a chemical reaction causes an electric current to flow.

Match each situation to the correct reason why energy is transferred.

The person's chemical store decreases and the spring's kinetic store increases.

The person's chemical store decreases and the spring's elastic store increases.

The person's kinetic store decreases and the spring's kinetic store increases.

The person's kinetic store decreases and the spring's elastic store increases.

A person is sitting still next to an unstretched spring. They then stretch the spring and hold it in the new stretched position. Which statement describes the main energy transfer?

Chemical reactions occured in body cells,

The person exerted a force on the spring.

The surrounding air was the same temperature as the spring.

A person is sitting still next to an unstretched spring. They then stretch the spring and hold it in the new stretched position. Identify two statements that explain why energy is transferred.

Which picture shows an elastic store of energy?

Objects that are moving have a {{}} store of energy.

If an object gets hotter, its {{}} store of energy increases.

increases the object's gravitational store of energy.

increases the object's kinetic store of energy.

increases the object's thermal store of energy.

increases the object's elastic store of energy.

Match each action with the energy store that increases as a result of the action.

Which of these can cause the temperature of an object to increase?

decreases the car's chemical store of energy.

increases the car's kinetic store of energy.

decreases the car's gravitational store of energy.

increases the surrounding's thermal store of energy.

A car drives downhill whilst also using the engine to get faster.  Match each process that happens to the correct energy store that changes.

Transferring energy

Lesson outcome