PBS
Pbs Teachers: Exploring Alternative Energy Sources
Calculate the increased cost of heating homes and fueling cars since the energy crisis. Investigate alternative renewable and nonrenewable energy sources that can be used to decrease Americans' dependency on fossil fuels.
CK-12 Foundation
Ck 12: Earth Science: Composition of the Atmosphere Study Guide
This comprehensive study guide covers the main terms and concepts needed for an earth science unit on the composition of the atmosphere. Review questions are included at the bottom of the study guide.
Ducksters
Ducksters: Environment for Kids: Global Warming
Kids learn about global warming and changes in the Earth's climate. What are some causes? Teach greenhouse gasses and carbon footprint.