In parts of the world with dry climates, a com bination of farming, overgrazing, sea- sonal drought, and climate change can turn farmland into desert.
desertification
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When we burn fossil fuels in our factories and homes, we release nitrogen and sulfur compounds. When those compounds combine with water vapor in the air, they form nitric and sulfuric acids. These airborne acids can drift for many kilometer
acid rain
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occurs if a pollutant, such as DDT, mercury, or a PCB, is picked up by an organism and is not broken down or eliminated from its body. Instead, the pol- lutant collects in body tissues.
biomagnification
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What causes soil erosion?
Soil erosion occurs primarily when dirt is left exposed to strong winds, hard rains, and flowing water.
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thief
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shark
Other team loses 25 points!
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rocket
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thief
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Give an example of a nonrenewable resource.
oil, natural gas, coal, and nuclear energy.
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can be produced or replaced by a healthy ecosystem
renewable resource
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heart
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star
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fairy
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lifesaver
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what is habitat fragmentation?
Loss of habitat due to building, clearcutting, etc. that can lead to loss of biodiversity.
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baam
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star
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fairy
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banana
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a gray-brown haze formed by chemical reactions among pollutants released into the air by industrial processes and automobile exhaust. Ozone is one product of these reactions.
smog
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natural processes cannot replenish them within a reasonable amount of time
nonrenewable resources
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Give an example of a renewable resource
solar, water, wind, trees
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a harmful material that can enter the biosphere.
a pollutant
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How is fresh water both a renewable and a limited resource?
Water circulates in nature in numerous states of matter, including liquid, vapor, and ice. The water that evaporates returns to the earth as precipitation.
