energyThe ability to make things happen.

fuelEnergy source; oil, natural gas, coal.

sourceA force that gives rise to something.

Thermal energy

Heat energy.

Chemical energyEnergy found in food and fuel

Electrical energy

Electricity, the energy that turns on light Bulbs and powers computers

Nuclear energy

Energy released when atoms are split apart and come together

Radiant energy

Energy sent out in the form of waves, such as light or heat energy

scalpel A tool: a small straight thin-bladed knife

atomsA tiny particle