Date post: | 13-Dec-2015 |
Category: |
Documents |
Upload: | merryl-palmer |
View: | 215 times |
Download: | 3 times |
Cycling of Materials The Carbon Cycle – the process by which
carbon is cycled between the atmosphere, land, water and organisms.
Carbon is necessary for life. Proteins, fats, and carbohydrates all contain carbon.
Carbon Cycle Short Term – when consumers eat producers,
the consumers obtain carbon from the carbohydrates.
Carbon Cycle Long Term – carbon is converted into
carbonates, the hard parts of bones and shells. These do not break down easily.
Some carbohydrates are converted into fats, oils, and other molecules that store energy. These deposits are known as fossil fuels.
The Carbon Cycle
Nitrogen Cycle Nitrogen is used to build proteins, which
build new cells. Nitrogen makes up about 78% of the gases in
the atmosphere. Nitrogen must be fixed by nitrogen-fixing
bacteria in order for living organisms to obtain nitrogen.
The Nitrogen Cycle
Phosphorus Cycle Phosphorus is contained in many molecules
that make up the cells of living organisms. The cycling of phosphorus occurs mostly in
the environment and does not usually occur in the atmosphere.
The Phosphorus Cycle
Human Impact Carbon – burning of fossil fuels.
Global warming
Acid Rain
Nitrogen and Phosphorus – used in fertilizers
Runoff causes algal blooms which destroys aquatic ecosystems by depleting oxygen.
Nitrogen- Acid Rain