Cycles in Nature.

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Presentation transcript:

Cycles in Nature

The Cycles of Matter Three cycles that moves matter among the environment and living things Water cycle Carbon cycle Nitrogen cycle

The Carbon Cycle

The Carbon Cycle The movement of carbon from the environment into living things and back again Carbon is essential to all living things because it is part of our molecules.

The Carbon Cycle- Important Process Photosynthesis- carbon moves from the environment into living things Plants use carbon dioxide from the air to make sugar Animals get carbon from eating plants Respiration- carbon moves from living things back to the environment Sugar molecules are broken down to release energy and carbon dioxide is given off when we exhale

Combustion- the process of burning fuel The Carbon Cycle Decomposition- carbon moving from dead organisms back to the environment Fungi and bacteria decompose dead organisms Combustion- the process of burning fuel Burning fossil fuels releases carbon back into the atmosphere

The Carbon Cycle

The Nitrogen Cycle

The Nitrogen Cycle The movement of nitrogen from the environment to living things and back again. 78% of our atmosphere is nitrogen gas Nitrogen fixation- the process of bacteria changing nitrogen gas into usable nitrogen for plants Animals get nitrogen from eating plants Other bacteria decompose dead animals and animal waste and return nitrogen to the atmosphere

Answer the following question How are fertilizers associated with the nitrogen cycle? Don’t know the answer? Do a small investigation aka. Web Search

The Nitrogen Cycle