Earth's Resources

Match it! Select the correct answer from the pull down...Good luck!

What was used by scientists to show how much humans have affected the Earth's ecosystems?

_________________ is when gases produced by burning fossil fuels trap heat in the air.

This natural resource can take hundreds of year to form and can easily be eroded.

What energy is from the heat inside the Earth?

What produces most of the energy that is used in the United States?

What was often used as an energy source when factories began mass producing clothing, furniture, and farm machines?

Where was the energy released from fossil fuels originally captured from?

A cost for using lumber to build houses would be ______ might lose their_______.