1. Why are fossil fuels considered nonrenewable? Fossil Fuels are sources of energy that take a very long period of time to form and once depleted, are essentially nonrenewable.

2. How does solar energy relate to fossil fuels? Solar energy from the ancient past is stored in fossil fuels, such as coal, petroleum, and natural gas. Nuclear power is also a source of nonrenewable energy.

3. What are the two elements fossil fuels are rich in? Fossil fuels are rich in carbon and hydrogen.

4. What are energy sources? Nonrenewable and Renewable Sources are energy sources. Energy sources are natural resources human use to generate energy.

5. What are renewable sources? Renewable sources are naturally replaced in a relatively short time Renewable Sources Solar Water Wind Geothermal Hydrogen Biomass

6. Energy Sources Nonrenewable Sources Coal Oil (Petroleum) Natural Gas Nuclear Power Renewable Sources Solar Wind Water Geothermal Biofuel