Human Impact on Earth

Front

Global warming has been linked to a decrease in the size of the polar ice caps .

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the size of the polar ice caps 

Front

Which human activity would preserve nonrenewable resources? Options: deforestation, removing carnivores from a forest, recycling, heating homes with fossil fuels

Back

recycling

Front

Continued depletion of the ozone layer will most likely result in

Back

an increase in skin cancer among humans

Front

The acidity of a local stream would most likely be affected by: a change in the percentage of decomposers living in the stream, a new source of air pollution, a new predator species being introduced to the ecosystem, a decrease in the amount of sunlight that reaches the stream

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a new source of air pollution

Front

Increased industrialization will most likely

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decrease available habitats

Front

Which human activity is correctly paired with its likely future consequence? Options: overfishing in the Atlantic — increase in supply of flounder and salmon as food for people, development of electric cars or hybrid vehicles — increased rate of global warming, use of fossil fuels — depletion of underground coal, oil, and natural gas supplies, genetically engineering animals — less food available to feed the world’s population

Back

use of fossil fuels — depletion of underground coal, oil, and natural gas supplies

Front

Which human activity would most likely deplete nonrenewable resources? Options: use of natural enemies to eliminate insect pests, development of wildlife refuges, governmental restriction of industrial pollution, increased use of fossil fuels

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increased use of fossil fuels

Front

Deforestation of areas considered to be rich sources of genetic material could limit future agricultural and medical advances due to

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the loss of biodiversity

Front

Deforestation by burning has been described as a "double whammy" to the environment, meaning it has 2 negative impacts. Why is this description accurate? Options: Forest burning releases CO₂ while decreasing oxygen, which disrupts cycles, Deforestation reduces the amount of oxygen in the atmosphere, which depletes the ozone layer, Forest clearing is often followed by land development, which often leads to increased noise pollution, Deforestation increases the number of plant and animal species by destroying habitat

Back

Forest burning releases CO₂ while decreasing oxygen, which disrupts cycles

Front

Why is water considered such a precious resource despite approximately 75 percent of the Earth's surface being covered in water?

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Only a small fraction of the Earth's water is freshwater available for drinking and irrigation.