CK-12 Foundation
Ck 12: Life Science: 12.22 Carbon Cycle
Understand the role that the carbon cycle plays in the ecosystem.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Soil, Plants, and the Energy Cycle
Students explore what kind and how much bio-mass can be produced in an area around your city or town. They figure how many gallons of fuel can be expected from one acre of crop land, and how much carbon can be sequestered in the local area.
King's Centre for Visualization in Science
Explaining Climate Change: Lesson 7: Climate Feedback Loops
This is the seventh lesson in a series of learning modules on the topic of climate change. In this lesson, you will learn how several important feedback loops help drive and regulate earth's unique climate system and affect climate...
NASA
Climate Kids: Greenhouse Effect
Fun website for kids to learn about earth science. Students read about greenhouse gasses and the effect on the environment.