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The Carbon Cycle

Learn about the four key cycles that govern the recycling and distribution of carbon, oxygen, water, and nitrogen in our environment. Discover how these elements are recycled through processes like photosynthesis, respiration, decomposition, weathering, and combustion. Understand the role of abiotic and biotic factors in determining the balance of these cycles.

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The Carbon Cycle

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  1. The Carbon Cycle Carbon is an element found in all living things. Four ways carbon is recycled is described here. • The oxygen cycle can be thought of having two sides or parts. One is photosynthesis during which green plants take in carbon dioxide and water and give off oxygen as waste. • and the other is respiration which uses oxygen and give off carbon dioxide and water as waste.

  2. Carbon Dioxide – Oxygen Cycle Sugar Oxygen Sugar Respiration Photosynthesis Water Water Carbon Dioxide

  3. The Carbon Cycle 2. Carbon is also stored in dead organisms. Bacteria and fungi decompose dead organisms and help return carbon to the atmosphere. 3. Additionally, carbon can be trapped in fossils and limestone deposits for millions of years. It is slowly released through the process of weathering.

  4. The Carbon Cycle 4. Fossil fuels also store carbon for long periods of time. The carbon atoms are only released when these fuels are burned.

  5. Abiotic factors- nonliving things in an environment such as water, light, soil and temperature Biotic factors- living things Abiotic factors help to determine what plants and animals can live in a certain environment.

  6. The Water Cycle Condensation Precipitation Water turns from gas (vapor) to liquid Water falls from the sky Condensation Transpiration water evaporates from plants Evaporation liquid water becomes water vapor (gas) Runoff Respiration Animals release water vapor Accumulation

  7. Lightning also fixes nitrogen by combining it with oxygen. It then falls down with rain in a usable form. The Nitrogen Cycle • Good News: Air is 78% nitrogen. • Bad News: Organisms cannot use pure nitrogen. • How is the problem “fixed”? It must be combined with other elements into a usable form. Blue Arrows – Usable nitrogen Red Arrows – Unusable free nitrogen Decomposer bacteria Denitrifying bacteria Break down nitrogen compounds in waste and dead organisms so it can be returned to the soil Break down nitrogen compounds in the soil and release back into the air Nitrogen-fixing bacteria Combine nitrogen with other elements to make it usable by organisms

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