U4 Test Review

Front

What is a major source of pollution created by humans?

Back

Industrial factories are a major source of pollution created by humans.

Front

Why will using renewable energy help reduce global warming?

Back

Renewable energy sources produce fewer greenhouse gases than fossil fuels.

Front

In which atmospheric layer does most precipitation occur?

Back

Most precipitation occurs in the troposphere.

Front

What percentage of solar energy reaches Earth's surface?

Back

About 50% of solar energy reaches Earth's surface.

Front

What is the Greenhouse Effect?

Back

The Greenhouse Effect is the warming of a planet due to energy from the sun trapped by the atmosphere.

Front

What are renewable energy sources?

Back

Renewable energy sources are energy sources that can be replenished naturally, such as solar, wind, and hydro energy.

Front

What are fossil fuels?

Back

Fossil fuels are natural substances formed from the remains of ancient plants and animals, including coal, oil, and natural gas.

Front

What is global warming?

Back

Global warming is the long-term increase in Earth's average surface temperature due to human activities, especially the burning of fossil fuels.

Front

What is the role of the troposphere?

Back

The troposphere is the lowest layer of Earth's atmosphere where weather occurs and most clouds form.

Front

What are greenhouse gases?

Back

Greenhouse gases are gases in the atmosphere that trap heat, including carbon dioxide, methane, and nitrous oxide.