Unit 12

What makes everything happen?

• Motion

• Energy

• Electricity

• None

The world depends heavily on _______ for energy.

• Fossil fuels

• Wind

• Sun

• Water

Fossil fuels are the remains of prehistoric;

• Animals

• Plants

• Insects

• plants and Animals both

Gasoline is separated from;

• Oil

• Petroleum

• Kerosene

• water

What is widely used for cooking and heating?

• Oil

• Coal

• Natural gas

• Biogas

Oil serves about _____ of the world's energy.

• 20%

• 30%

• 40%

• 50%

which electric power is generated by running water?

• Thermal

• Hydro

• Solar

• Nuclear

What is put into a nuclear reactor to produce energy?

• water

• oil

• uranium

• gas

Which energy is cheap and limitless but its future looks uncertain?

• Solar

• Thermal

• Hydro

• Nuclear

______ is the greatest source of energy.

• Sun

• Wind

• Water

• Uranium