Which of the following energy sources is energy that comes from within the earth?

• Wind

• Solar

• Geothermal

• Biomass

Which of the following are ways by which geothermal energy finds its way to the Earth's surface?

• volcanoes

• hot geysers

• hot springs

• mountains

• islands

Which of the following renewable energy sources come from plants and animals?

• geothermal

• coal

• solar

• biomass

What was the main source of energy for the world until the mid-1800's?

• wind

• solar

• geothermal

• biomass (wood)

Solar energy is energy from what?

• The inside of the Earth

• The Sun

• Mars

• Any plant that has died in the past.

The slow decay of radioactive particles in the Earth's core is the source for which type of renewable energy?

• biomass

• nuclear

• geothermal

• wind

Which of the following is the largest renewable energy source in the United States today?

• Coal

• Natural gas

• Hydropower

• Wind

Which of the following terms are part of the water cycle?

• Evaporation

• Digestion

• Condensation

• Precipitation

• Flammable

Hydropower is produced by what?

• water

• wind

• moving water

• the Sun

The uneven heating of Earth's surface by the Sun contributes to which of the following sources of renewable energy?

• Solar

• Geothermal

• Biomass

• Wind