What is the standard unit used to measure energy?

What word is used to describe a general category of energy that is inactive and stored?

Organise the stores of energy into correct categories.

Groups:

(a) POTENTIAL

,

(b) KINETIC

• food

• heat

• light

• elastic

• gravitational

• fuel

• electric

• sound

Use khdudcm to convert 760 joules into kilojoules.

• 76 kJ

• 7600 kJ

• 0.76 kJ

• 0.076 kJ

What word is used to describe the energy of a moving object?

What scientific word is used to describe heat energy?

The figure shows a peanut burning under a test tube of water. What energy transformation is taking place?

• Thermal → Chemical

• Chemical → Thermal

• Chemical → Kinetic

• Chemical → Electric

A girl lifts a puppy off the floor. Which energy transformation is taking place?

• Gravitational potential → Thermal

• Gravitational potential → Kinetic

• Thermal → Gravitational potential

• Kinetic → Gravitational potential

The diagram shows energy changing between stores while a girl rides a bicycle to generate electricity and heat water. Match the coloured energy units to the correct energy store.

• thermal

• grey

• chemical

• green

• kinetic

• blue

• electrical

• red

A musician plucks a guitar string. Which energy transformation occurs?

• Chemical → Sound

• Kinetic → Sound

• Electrical → Sound

• Thermal → Sound