Greenhouse Effect, Global Warming

Which of the following things could increase Earth's temperature?

• A decrease in the amount of greenhouse gases in the atmosphere

• Planting more trees

• Widespread removal of tropical forests

• A reduction in the use of fossil fuels

When the levels of greenhouse gases in the atmosphere increase, which statement is true?

• Earth's temperature increases because the flow of heat into Earth increases.

• Earth's temperature increases because the flow of heat into Earth decreases.

• Earth's temperature increases because the flow of heat out of Earth increases.

• Earth's temperature increases because the flow of heat out of Earth decreases.

What would happen to temperature after Day 5 in this graph, based on what's shown in Days 1-4?

• Temperature will increase because heat flow out of the Earth decreased.

• Temperature will increase because heat flow out of the Earth increased.

• Temperature will decrease because heat flow out of the Earth decreased.

• Temperature will decrease because heat flow out of the Earth increased.

What can we conclude, based on this graph?

• Global temperatures are rising due to decreased amounts of carbon dioxide in the atmosphere.

• Global temperatures are declining due to decreased amounts of carbon dioxide in the atmosphere.

• The amount of carbon released each year is greater than the amount of carbon stored each year.

• The amount of carbon released each year is less than the amount of carbon stored each year.

What are the two sectors that emit the greatest quantities of greenhouse gases?

• Power stations and waste disposal and treatment

• Power stations and industrial processes

• Power stations and transportation fuels

• Power stations and agricultural byproducts

Which of the following is NOT an example of a greenhouse gas?

• carbon dioxide

• carbon monoxide

• water vapor

• methane

Which planet is much warmer than Earth because it experiences a much stronger greenhouse effect than Earth's?

• Venus

• Jupiter

• Mars

• Pluto

What can we conclude about global sea levels, based on the data shown?

• Global sea levels have decreased as global temperatures have decreased.

• Global sea levels have decreased as global temperatures have increased.

• Global sea levels have increased as global temperatures have decreased.

• Global sea levels have increased as global temperatures have increased.

What is the greenhouse effect?

• Global warming

• Climate change

• A naturally occurring process in which greenhouse gases in the atmosphere help make the Earth warmer by re-radiating heat to the surface.

• A naturally occurring process in which greenhouse gases in the atmosphere help make the Earth colder by re-radiating heat to the surface.

What do these images show us?

• Evidence of natural changes in climate.

• Evidence of human-caused changes in climate.

• Evidence of seasonal changes in weather.

• Evidence of seasonal changes in climate.