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chapt 3 lesson 3&4
| Term | Definition |
|---|---|
| crust | the thin layer of rock that forms on Earth's outer surface |
| mantle | layer of very hot but solid rock beneath Earth's crust |
| core | the layer of earth below the mantle |
| tectonic plates | one of the rigid plates of the lithosphere |
| land forms | a mountain, island, or continent formed by the collisions or separation of tectonic plates |
| deposition | the movement and accumulation of eroded soil |
| evaporation | a change in state from liquid to gas |
| transpiration | the release of water vapor by plants through their leaves |
| precipitation | the return of water from the atmosphere to earth's surface in the form of hail, rain, snow, or sleet |
| condensation | a change in state from vapor to liquid |
| aquifers | a sponge like formation of rock, sand, or gravel |
| groundwater | fresh water found below earth's surface |
| law of conversion of matter | the principle that states that matter can change form but cannot be created or destroyed |
| nutrient | matter that organisms need to carry out their life processes |
| biogeochemicals cycles | the circulation of nutrients through the atmosphere; also called nutrient cycle |
| primary producer | an organism that can capture energy from the sun or from chemicals and store it |
| photosynthesis | the process by which primary producers use sunlight to convert carbon dioxide and water into sugars, releasing oxygen |
| consumer | an organism that relies on other organisms for energy and nutrients |
| decomposer | an organism that breaks down nonliving matter into simple parts that can then be taken up and reused by primary producers |
| cellular respiration | the process by which organisms use oxygen to release the chemical energy of sugars producing carbon dioxide and water |
| eutrophication | the introduction of phosphorus and nitrogen into a body of water that leads to over growth of algae and other producers |
| nitrogen fixation | the conversion of gas into ammonia |