Global Warming: Greenhouse Gases

What is the greenhouse effect?

• warming of the earth due to gases in our atmosphere.
• cooling of the earth due to gases in our atmosphere

We need the natural greenhouse effect for Earth to be habitable.

• True
• False

The enhanced greenhouse effect leads to global warming.

• True
• False

Which 2 greenhouse gases contribute the MOST to global warming of Earth?

• Nitrogen dioxide and water vapor

• Ozone and water vapor

• Carbon dioxide and methane

Which of the following sets of evidence supports global warming?

• CO2 levels rising
• Sea Levels rising
• Glacier mass decreasing
• All of the Above

The following graph tells us what?

• Sea Levels are decreasing.
• Sea Levels are rising.

What temperature would Earth be with no greenhouse effect?

• 25 degrees C
• 50 degrees C
• -18 degrees C
• 0 degrees C

Climate is defined as...

• a change in weather/temperature over a long period of time.
• a change in density over a long period of time.

The main human activity that releases greenhouse gases is

• using bottled water
• burning fossil fuels
• texting on cellphones
• eating meat

Worldwide, temperatures have been increasing for more than 100 years.  Is this evidence of global warming?

• yes
• no

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