Carbon Cycle

True or False: The elements Carbon and Nitrogen are important for life.

• True

• False

Which of the following contain carbon?

• Carbohydrates

• Proteins

• Nucleic Acids

• All of the above

Where can carbon be found?

• dissolved in the ocean

• in rocks

• in fossil fuels

• in living organisms

• All of the above

When plants do photosynthesis, they take in ______________ from the atmosphere and use it to build glucose.

• carbon dioxide

• oxygen

• glucose

• water

The burning of fossil fuels returns _____ back to the atmosphere.

• Oxygen gas

• Nitrogen gas

• Carbon Dioxide

In order for organisms to use nitrogen, it has to be ______ into more useable forms.

• fixed

• removed

Nitrifying bacteria converts ammonia to

• Ammonium

• Nitrates

Denitrifying bacteria convert the ammonia in soil to

• oxygen

• nitrogen gas

• soil

Fertilizer runoff can cause...

• An increase of nitrogen in the water

• An increase in algae growth

• A decrease in the number of fish in the water because of a lack of dissolved oxygen.

• All of the above

Carbon can be found in...

• The atmosphere
• Soil
• Fossil fuels
• All of the above

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3