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Stack #68128

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Question
Answer
water cycle   the continuous process by which water moves from Earth's surface to the atmosphere and back, passing through the living and nonliving parts of the environment  
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nitrogen cycle   the process by which nitrogen is removed from the atmosphere, fixed in the soil by bacteria, incorporated into other living things, and then released back into the atmosphere  
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carbon cycle   the system in which carbon is transferred from Earth's interior to the atmosphere, oceans, crust, and living things  
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nitrogen fixation   the process of changing free nitrogen gas into a usable form of nitrogen  
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evaporation   process by which molecules of liiquid water absorb energy and change to the gas state  
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condensation   the change from the gaseous to the liquid state of matter  
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precipitation   forms of water such as rain, snow, sleet or hail that fall from clouds and reach Earth's surface  
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groundwater   water that fills the cracks and pores in underground soil and rock layers  
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drought   a water shortage caused by long periods of low precipitation in a particular area  
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photosynthesis   process by which plants and some other organisms capture light energy and use it to make food from carbon dioxide and water  
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greenhouse gases   gases in the atmosphere that trap heat  
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global warning   a gradual increase in the temperature of Earth's atmosphere  
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ozone   a form of oxygen that has three oxygen atoms in each molecule instead of the usual two  
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ozone layer   the layer of the upper atmosphere about 30 kilometers above Earth's surface where ozone is concentrated  
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chlorofluorocarbons   one of a group of chlorine compounds formerly used in air conditioners and refrigerators  
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Created by: Triana Silliman
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