Sources of Energy

Which source of energy is non-renewable?

• water

• sun

• coal

• wind

The main element present in fossil fuels is called:

• hydrogen

• carbon

• oxygen

• uranium

What is expected to last for another 100 years?

• solar energy

• uranium

• fossil fuels

• clean water

They absorb sunlight and store it in a solar battery.

The main disadvantage of wind mills is that the material is NOT:

• disposable

• cheap

• reliable

• abundant

The main disadvantage of fossil fuels is harmful emission of:

Which type of energy has the highest energy output?

• solar energy

• nuclear energy

• water energy

• fossil fuels

________ waste is put underground or under the ocean, where it must stay for thousands of years to decay: