Sun, wind water and geothermal energy are considered _____________________ energy resources since these resources can never run out.

Land that is set aside to protect it from environmental problems is called a _______________ _________________.

Wood, leaves, and manure belong to a group of renewable energy sources called ____________________.

A liquid fossil fuel formed from the remains of animals, algae, and other organisms is ____________________.

The energy generated by moving water in rivers is called _________________________ energy.

A fuel is a substance that provides _________________________as a result of a chemical change.

Specific sources of pollution that can be identified are called _____.

Using less water is one way to practice water ____________.

The intense heat from Earth's interior that warms the magma underneath the surface is called _______________.

____Factories where crude oil is separated into fuels and other products are called _____.

Which fossil fuel produces the lowest levels of most air pollutants?

Coal is a solid fossil fuel formed from _____.

Which of the following is an example of energy conservation?

The three major fossil fuels are coal, oil, and _____.

Fossil fuels are energy-rich because they contain___________.

Fossil fuels are considered nonrenewable resources because they _____.

What is the result of using fossil fuels more rapidly than they are formed?

Which of the following is an advantage of solar energy?

What is the most widely used source of renewable energy in the world today?

The splitting of an atom’s nucleus into two smaller nuclei is called _____.

Energy conservation means _____.

What natural resource is being depicted in this graph?

What category would you expect to see the biggest increase in as the population increases?