Biogeochemical Cycles

___________ is the most abundant gas in our atmosphere at 78%.

• Oxygen

• Carbon Dioxide

• Phosphorus

• Nitrogen

Nitrogen can't be used directly from the atmosphere.

• True

• False

Process in which nitrifying bacteria change ammonia into nitrites and then nitrates so that plants can absorb the nitrogen.

• Denitrification

• Nitrification

• Nitrogen Fixation

• Decomposition

Process by which bacteria convert nitrogen compounds in the soil back into atmospheric nitrogen.

• Nitrification

• Denitrification

• Combustion

• Assimilation

Identify the cycle pictured.

• The Water cycle
• The Carbon cycle
• The Nitrogen cycle
• The Phosphorus cycle

Identify the cycle pictured.

• The Water cycle
• The Carbon cycle
• The Nitrogen cycle
• The Phosphorus cycle

Tags

NGSS.MS-LS1-6

A correct path that nitrogen could take would be

• air -> animals -> plants -> bacteria

• animals -> air -> bacteria -> plants

• bacteria -> air -> plants -> animals

• air -> bacteria -> plants -> animals

Tags

NGSS.MS-LS2-3

When water vapor is cooled and forms droplets of liquid water

• Condensation

• Evaporation

• Transpiration

• Runoff

Tags

NGSS.MS-ESS2-4

What effect does the sun have on surface water?

• It causes it to boil

• It causes it to rain

• It causes it to sink

• It causes it to evaporate

Tags

NGSS.MS-ESS2-4

The process when plants release water vapor from their leaves is called _____________.

• precipitation

• evaporation

• transpiration

• condensation

Tags

NGSS.MS-ESS2-4