Small peices of material that have broken off of rocks and have been deposited by water, wind, and ice.
Rock formed when sediment is pressed and cemented together naturally, over millions of years.
Fuels such as coal, oil, and natural gas. These fuels are formed over millions of years from the remains of old plants and animals.
Carbon dioxide-oxygen cyle
The continual transfer of carbon dioxide and oxygen between living things and the environment.
Plants use energy from the sun to convert, or change, carbon dioxide and water into sugars.
Why is it important the study the carbon cycle?
So we can see how human activity may lead to global warming.
When we cut down trees and burn wood, the carbon in them becomes carbon dioxide and enters the atmosphere.
Burning fossil fuels from the ground for energy so we can run cars, produce electricity, and manufacture goods.