Carbon Cycle & Greenhouse Gases

In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.

• burning . . . photosynthesis

• fixation . . . decomposition

• decomposition . . . photosynthesis

• respiration . . . decomposition

• respiration . . . photosynthesis

Where does all the carbon in organisms (living things) originate from?

• Earth's atmosphere

• Rocks

• Water

• Soil

What kind of organism takes out the most carbon from the atmosphere?

• Plants

• Bacteria

• Animals

• Humans

Using fossil fuels is a safe for the environment. 

• True
• False

The Earth gets energy from the sun

• True

• False

All BUT the following are greenhouse gases:

• Water vapor

• Carbon Dioxide

• Neon

• methane

Carbon Dioxide is produced naturally in the our atmosphere.

• True

• False

Man has altered the natural carbon cycle by burning coal, oil, natural gas and wood

• True

• False

Consequences of climate change include:

• Stronger hurricanes
• Increased flooding
• Frequent droughts
• All of the above

Without the Greenhouse Effect the Earth would be

• warm 
• cold
• dead