Earth Systems and Cycles

How does matter move among the living and nonliving parts of an ecosystem?

• matter is recycled within and between ecosystems
• one-way flow of energy

Tags

NGSS.MS-LS2-3

What is our role in the carbon cycle? 

• We are made of carbon. 
• We release it into the atmosphere when we breathe. 
• We release it into the atmosphere when using fossil fuels. 
• All of the above. 

Tags

NGSS.MS-ESS3-4

Why is nitrogen important to organisms?

• All plants and animals need nitrogen to make amino acids, proteins and DNA.
• All plants and animals need nitrogen to make sugar.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-2

Carbon is found in the atmosphere in the form of 

• carbohydrates
• carbon dioxide
• calcium carbonate
• ammonia

Tags

NGSS.MS-LS2-3

Where is carbon found? 

• Atmosphere
• Soil
• Us
• All of the above

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which cycle is this?

• Carbon
• Nitrogen
• Phosphorus
• Water

Tags

NGSS.MS-LS1-6

Which cycle is this?

• Carbon
• Nitrogen
• Phosphorus
• Oxygen

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

The oceans and forests are a large carbon reservoir/sink.

• True
• False

Tags

NGSS.HS-ESS2-6

NGSS.HS-LS2-5

What percentage of the atmosphere is made up of nitrogen gas?

• 50

• 78

• 21

• 100

What percentage of air composed of Oxygen?

• 78

• 1

• 21

• 100