Natural Processes That Affect Global Temperature

What is the greenhouse effect?

• an increase in the average temperature near the
  Earth's surface.
• a natural process that helps make the Earth warm
  enough for us to live.
• a decrease in the layer of ozone gas found high in the Earth's atmosphere.
• the broader set of changes that go along with global warming.

What is global warming?

• a change in the statistical distribution of weather patterns.
• a natural process that helps make the Earth warm enough for us to live. 
• a decrease in the layer of ozone gas found high in the Earth's atmosphere.
• an increase in the average temperature near the Earth's surface. 

What is this difference between global warming and the greenhouse effect?

• Global warming refers to a change in the Earth's climate that is causing it to heat up; the greenhouse effect is a natural process that happens constantly, due to sunlight and the atmosphere.
• Global warming and the greenhouse effect are the same thing.
• The greenhouse effect comes within global warming.
• Global warming comes within the greenhouse effect

If human civilization had never developed on Earth, would there be a greenhouse effect? 

• No, there is no conclusive evidence that a greenhouse effect exists. 
• No, the greenhouse effect is caused by humans burning fossil fuels. 
• Yes, the greenhouse effect is caused by plants giving off gases. 
• No, the greenhouse effect is caused by humans depleting ozone. 

What is the major cause of the greenhouse effect? 

• Gases in the atmosphere absorb heat from the Earth's surface.
• Gases in the atmosphere absorb heat from the Sun. 
• Gases in the ozone layer absorb heat from the Sun.
• Gases in the ozone layer absorb heat from the Earth's surface. 

We can slow the rate or even reverse global warming. 

• True
• False

The greenhouse effect is more harmful than global warming.

• True
• False

Global warming and the greenhouse effect are exactly the same.

• True
• False

Burning fossil fuels is one of the main causes for global warming.

• True
• False

Which of the following is a greenhouse gas that is released by human activities and speeds up global warming?

• Nuclear power
• Petroleum
• Natural gas
• Carbon dioxide