Carbon and The Earth

Within the carbon cycle, anything that absorbs more carbon from the atmosphere than it releases.

• carbon sink

• carbon source

Within the carbon cycle, anything that releases more carbon into the atmosphere than it absorbs.

• carbon sink

• carbon source

Select all that apply.

Which of the following are carbon sources.

• fossil fuel combustion

• volcanic eruptions

• forests

• oceans

Forests are carbon sinks because they remove carbon dioxide from the atmosphere through ____________.

• combustion

• respiration

• photosynthesis

• decomposition

Human activities add greenhouse gases to the atmosphere, therefore we are carbon ________.

• sinks

• sources

The main human activity that adds to an individual's carbon footprint.

• usage of alternative energies (wind, solar, etc)

• respiration and growth

• photosynthesis by plants

• usage of fossil fuels for energy

The average temperature of earth is rising. 

• True
• False 
• I don't know

Combustion is another word for _______________.

• a train
• a bus
• a dog
• burning

What gas is increasing in large amounts due to human activities?

• BP
• carbon dioxide
• oxygen
• diesel

What is it called when carbon is always traveling from place to place and taking different forms in the process.

• fun
• The Obama Effect
• Chocolate Chip Cookie
• Carbon Cycle