Solar power can be obtained from the sun.

Sunlight is one example of a ____.

Coal can be burned to provide power and electricity.

Coal is one example of a ____.

Electric power can be generated with wind turbines.

Wind is one example of a _____.

Petroleum is extracted from the land with large drilling rigs.

Petroleum is one example of a _____.

Unlike dirt, soil is a rich organic matter formed in a process that takes hundreds of years.

Soil is one example of a ____.

Electric power and energy can be harnessed from moving water.

Hydroelectricity is one example of a _____.