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Semester Exam Review pg 3

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Term
Definition
Water Cycle   model describing how water moves from the Earth's surface to atmosphere and back to the surface again through evaporation, condensation, precipitation  
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Evaporation   water changes from a liquid to a gas  
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Condensation   gas changes back to a liquid  
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Precipitation   droplets that fall from the clouds to ground as rain, snow, sleet, etc...  
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Nitrogen cycle   model describing how nitrogen moves from the atmosphere to the soil, to living organism, and then back to the atmosphere.  
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Nitrogen   cannot be used by plants in the free form in the air. Some soil bacteria can form the ________ so that plants can use it. Animals eat plants for _________. Waste from animals returns ________ to the soil.  
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nitrogen   When animals and plants die and decompose ______ is returned to the soil for plants. Plants use the _______ to build cells. Human body uses _______ for DNA.  
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Carbon Cycle   describes how carbon molecules move between the living and nonliving world.  
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Carbon Cycle   The ______ _________ begins when producers (plants) remove carbon during photosynthesis. The plants release oxygen. All other organisms use the oxygen and release carbon back into the air. This is part of respiration.  
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Human activities   release carbon into the atmosphere. (Fossil fuels for gasoline, burning coal, and burning materials)  
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carbon   We have cut down so many trees that is is hard for all _______ to be recycled as oxygen.  
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human population   The ______ __________ is increasing which requires more natural resources to be used. The more people, the more fossil fuels we use which increases pollution.  
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pollution   The more people, the more fossil fuels we use which increases _____________. This will cause more of the greenhouse gases and the result is global warming.  
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renewable   resources that can be replaced  
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nonrenewable   resources that cannot be replaced  
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Fossil fuels and Nuclear Energy   are both nonrenewable  
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Water, solar, hydroelectric, and geothermal   all all resources that are renewable  
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Created by: mgrant
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