Human Impact on the Environment

______________ gases are the atmospheric gases that contribute to the greenhouse effect.

_________ __________ is a natural process by which Earth's surface is heated by certain gases in the atmosphere, helping to maintain the normal range of temperatures on Earth.

Identify the greenhouse gases that make the greenhouse effect possible. Check all that apply.

• nitrous oxide

• methane

• carbon dioxide

• nitrogen

• water vapor

Greenhouse gases absorb radiation from the _________

Greenhouse gases absorb radiation from the Earth and re-radiate it back toward the __________

Greenhouse gases absorb radiation from the Earth and re-radiate it back toward the Earth, which helps to maintain a normal range of _____________ on Earth.

_________ __________ is an increase in the average temperature on Earth.

Which of the following are possible causes of global warming? Check all that apply.

• poor measurement

• changes in distance to the Sun

• natural fluctuations

• differences in emitted energy from Earth

• human activity

Which of the following are ways that humans increase the amount of greenhouse gases in the atmosphere? Check all that apply.

• burning fossil fuels

• deforestation

• landfills

• death of organisms

• agriculture

_______ ________ - a change in average global weather patterns