Unit Test Answers

In the 1980s laws were passed to reduce the amount of certain chemicals used by companies and individuals. According to these laws, the use of chlorofluorocarbons, or CFCs, should be reduced and eventually eliminated. These compounds contain chlorine and cause problems when released into the Earth’s atmosphere.

Which environmental policy must consider the expensive startup costs associated with building machines that harvest energy from clean sources?

Which statement describes the current theory about the relationship between the human population and mass extinction?

How does the construction of dams positively affect natural resources?

The image illustrates a human-induced environmental change.

Which statement explains how smog forms?

Why is urbanization contributing to pollution?

Which best explains the effect of reforestation on land?

Which human-induced change results in increased competition caused by an initial increase in the number of organisms in a habitat?

Which statement provides the best argument in favor of deforestation?

Which chemicals are major contributors to ozone layer destruction? Select two answer choices.phosphorusnitrogenbrominechlorinecarbon dioxidemethane

Which statements describe global warming? Select two answer choices.Global warming can be decreased through deforestation.Global warming occurs naturally.Global warming results from the buildup of nutrients in runoff.Global warming is likely increased by humans.Global warming is enhanced by nonnative species.

What process leads to deforestation and increased erosion?

Which of the following are examples of short-term, human-induced environmental changes? Select three answer choices. mass extinctionglobal warmingdeforestationozone layer destructionpollution

Leon made a study chart about human-induced changes to the environment. Environmental Changes Caused by HumansXYResults from introducing harmful substances into the environmentExample: oil spillResults from natural areas being cleared and replaced by human developmentExample: deforestation

Which is a negative effect of deforestation on the environment?

How has the EPA improved air quality over the last 30 years?

Which of the following are effects of environmental change on populations?

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

Ariel drew a diagram to compare two human-induced environmental changes.

Which of the following are effects of environmental change on an entire species?

A large power plant burns coal to generate electricity for nearby homes and businesses.This contributes most directly to which short-term human-induced environmental change?

Which challenge arises from trying to protect the environment?

Which term refers to the process by which land is worn away by natural forces or human activity?

Which correctly lists three main causes of deforestation?