2B and 2C

Which of the following are greenhouse gases?

• Carbon dioxide

• Methane

• Water vapor

• All answers are correct

The Earth acts like a greenhouse that catches and traps heat from the sun.

• true
• false

True or False: All of the radiation from the Sun is absorbed by the Earth

• True
• False

The gas that is most abundant in the atmosphere is

• oxygen
• nitrogen
• carbon dioxide
• argon

The gas that is the second most abundant in the atmosphere is

• oxygen
• nitrogen
• carbon dioxide
• argon

Increased carbon dioxide may cause global warming by

• allowing more sunlight into the atmosphere.
• reflecting more sunlight from clouds.
• reducing the amount of oxygen in the air.   
• trapping more heat in the atmosphere.

T/F: Water vapor is a greenhouse gas

• True
• False

Which color has the highest frequency?

• green

• blue

• red

• yellow

Which color has the longest waves?

• red

• orange

• yellow

• green

The portion of the electromagnetic spectrum that humans can see is called:

• radio waves

• visible light

• gamma rays

• x-rays