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| the layers of gas that surround the Earth, other planets, or stars |
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| an environmental factor not associated with the activities of living organisms |
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| the imaginary line on which an object rotates (e.g. Earth’s axis runs through Earth between the North Pole and the South Pole) |
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| factors in an environment relating to, caused by, or produced by living organisms |
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| an animal or plant that consumes or obtains nutrients from animals |
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| an animal or plant that consumes or obtains nutrients from animals |
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| the breakdown and alteration of rocks at or near Earth’s surface as a result of chemical processes |
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| all the populations of organisms belonging to different species and sharing the same geographical area |
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| an organism that feeds on other organisms for food |
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| heat transfer in a gas or liquid by the circulation of currents from one region to another |
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| outermost layer of Earth covering the mantle |
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| any organism that feeds or obtains nutrients by breaking down organic matter from dead organisms |
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| the process by a certain area which sediment is carried by forces (e.g. wind, rain, or water currents) and left in earthquake - the shaking of the ground caused by the sudden release of energy in Earth’s crust |
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| an ecological community, together with its environment, functioning as a unit |
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| a change of energy from one form to another (e.g. mechanical to electrical, solar to electrical) |
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| the sum of conditions affecting an organism, including all living and nonliving things in an area, such as plants, animals, water, soil, weather, landforms, and air |
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| an imaginary circle around Earth’s surface located between the poles and a plane perpendicular to its axis of rotation that divides it into the Northern and Southern Hemispheres |
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