Unit Test — Cumulative exam Answers

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What is the most effective way to protect dry lands from desertification?

terrace farming

mine digging

planting a tree belt

constructing a dam

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Which greenhouse gas has an average lifetime in the atmosphere of a few weeks to thousands of years and is the largest contributor to climate change?

carbon dioxide

methane

nitrous oxide

fluorinated gas

Which situation is an example of a human-induced environmental change affecting a population?

Blue jays no longer live in a forest because the trees in the forest were cut down.

A volcanic eruption killed grasses that were growing within a few miles of the volcano.

Floods from a storm forced many white-tailed deer to move to a new habitat.

A fisher caught a few different species of fish that live in an ocean habitat.

Which definition best describes global warming?

a long-term change in the Earth's climate

a long-term increase in the Earth's average temperature

a long-term change in the climate of a region or a city

solar heat that is radiated out into space

Which statement best describes the greenhouse effect?

It is a process by which plants are able to grow well in a warm, enclosed structure.

It is a process by which greenhouse gases block the sun’s light to penetrate the atmosphere.

It is a process by which greenhouse gases allow the sun’s light to penetrate the atmosphere but stop the heat from escaping.

It is a process by which prevailing winds bring moisture to the land, to the prevailing wind direction.

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