What does it mean that a source of energy is nonrenewable?
A. Once used, it needs to be reprocessed for reuse.
B. It does not create pollution when used.
C. With proper administration, it can be reused.
D. There is only a limited supply that can be used
D. There is only a limited supply that can be used
Crude oil was formed millions of years ago from the remains of living things. Where is crude oil found today?
A. inside living things that have died
B. floating in the ocean
C. under dry land and under the ocean
D. inside rocks inside rocks
C. under dry land and under the ocean
Which fuel creates the most air pollution when burned?
A. natural gas
B. clean fuels
C. electricity
D. coal
D. coal
When were fossil fuels formed?
A. tens of billions of years ago
B. millions of years ago
C. hundreds of years ago
D. tens of years ago