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Chapter 2

Chapter 2. 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 Water Cycle. The Water Cycle. The movement of water among oceans, atmosphere, land, and living things.

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Chapter 2

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  1. Chapter 2 Cycles in Nature

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

  3. The Water Cycle

  4. The Water Cycle • The movement of water among oceans, atmosphere, land, and living things. • Precipitation- water moving from atmosphere to land • Ex: rain, snow, sleet, hail • 91% falls into the ocean, 9% on land renews fresh water supply

  5. The Water Cycle • Evaporation- water moving from the land to the atmosphere • The sun’s heat causes water to change from liquid to vapor • Condensation- water vapor becoming liquid again due to cool atmosphere • Transpiration- water moving from living things back into the atmosphere • Ex: evaporation from leaves, perspiration from humans

  6. The Water Cycle • Ground Water- precipitation that seeps into the ground and is stored in underground caverns and porous rock • Provides water for the soil, streams, rivers, and oceans • Our water supply is not getting larger so we must protect our fresh water from pollution!!

  7. Run Off- rainfall not absorbed in soil that collects in rivers, lakes, streams, and oceans.

  8. The Water Cycle

  9. The Carbon Cycle

  10. 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.

  11. The Carbon Cycle • 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

  12. 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

  13. The Carbon Cycle

  14. The Nitrogen Cycle

  15. 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

  16. The Nitrogen Cycle

  17. Dr. Destruction Comic Strips • You and your group will be responsible for creating a comic strip featuring an evil villain who plans to destroy an ecosystem by interrupting one of the cycles that runs in an ecosystem. • Choose one cycle from the following: • Water Cycle • Carbon Cycle • Nitrogen Cycle

  18. Dr. Destruction Comic Strips • The comic strip must explain: • The way the cycle works • How the villain plans on disrupting the cycle • What effects the villain’s interruptions will have on the cycle • What plan your superheroes have for stopping the interruption • You will be graded on: • Having all requirements in your comic strip • Using color and creativity in the final product • All members will be graded on the final project with a participation grade added based on their involvement in the project.

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