Carbon & Nitrogen Cycles

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water
• Atmosphere
• Sun
• Air

Tags

NGSS.MS-ESS2-1

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration and photosynthesis
•  decomposition and respiration

Tags

NGSS.HS-LS2-5

What is happening at 1?

• respiration: releasing CO2
• decomposing CO2 in the soil
• photosynthesis: absorbing CO2
• turning CO2 from the atmosphere into organic molecules

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Using fossil fuels is a safe for the environment. 

• True
• False

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

Organisms that need nitrogen to survive

• only plants
• only animals
• only bacteria
• all living organisms

Tags

NGSS.MS-LS2-1

Organisms that play a role in the nitrogen cycle

• only plants
• only animals
• only bacteria
• plants, animals, & bacteria

Tags

NGSS.MS-LS2-3

When nitrogen gas is turned in to a form that plants and animals can use is called 

• Combustion
• Photosynthesis
• Decomposition
• Nitrogen Fixation

How do  animals get nitrogen?

• the atmosphere 
• eating other organisms
• bacteria
• lightning 

Building proteins and DNA is the reason organisms need what substance?

• Water
• Carbon
• Nitrogen
• Calcium

Tags

NGSS.HS-LS1-1

What converts nitrogen into a useable form for plants and animals?

• bacteria
• fungi
• rain

Tags

NGSS.MS-LS2-3