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7
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Pollution that does not come from a single location, but rather from many sources such as runoff from farms
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8
|
Something that pollutes, or damages, air, soil, or water
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9
|
The natural environment in which a plant or animal lives
|
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10
|
A chemical that is poisonous to humans or other living things
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11
|
Made up of water that is fresh, not salty;
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13
|
Water pollution from a single place, such as a discharge pipe at a plant that treats sewage
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14
|
A series of plants and animals, each of which depends on the one below it for food
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15
|
A community of all the living things in an area and the environment in which they live
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|
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|
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1
|
Bits of soil left in a place by moving water
|
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2
|
Damage to the natural environment caused by harmful substances
|
|
3
|
Large mass of ice found near Earth’s poles or in a high, cold mountain valley
|
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4
|
Water from rainfall that is not absorbed into the soil and instead flows into streams or lakes
|
|
5
|
A geographic area that includes all of the land and waterways that drain into a body of water.
|
|
6
|
Nonnative plants and animals that invade an ecosystem
|
|
12
|
An area where the soil is usually wet or covered with water
|
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14
|
All of the feeding relationships within an ecosystem.
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|
|
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