Biogeochemical Cycles

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

• Oxygen

• Carbon Dioxide

• Phosphorus

• Nitrogen

Tags

NGSS.MS-PS1-1

_______________ found in the soil and roots of plants "fix" nitrogen through the process called nitrogen fixation.

Tags

NGSS.MS-LS2-3

Nitrogen can't be used directly from the atmosphere.

• True

• False

Tags

NGSS.MS-ESS2-1

Process in which nitrogen can be fixed by lightning, bacteria, or industries.

• Nitrogen Fixation

• Denitrification

• Photosynthesis

• Weathering

Tags

NGSS.MS-LS2-3

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

• Denitrification

• Nitrification

• Nitrogen Fixation

• Decomposition

Tags

NGSS.HS-LS2-3

Process by which animals obtain and digest nutrients by consuming plants or other animals.

• Consumption

• Excretion

• Decomposition

• Respiration

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Process by which decomposers break down dead plants and animals and return the nutrients to the soil.

• Respiration

• Decomposition

• Assimilation

• Leaching

Tags

NGSS.MS-LS2-3

Process by which nutrients are returned to the soil through waste products.

• Excretion

• Weathering

• Respiration

• Combustion

Tags

NGSS.MS-LS2-3

Process by which nitrogen is returned to the soil as ammonia after decomposition.

• Denitrification

• Nitrification

• Leaching

• Ammonification

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

• Nitrification

• Denitrification

• Combustion

• Assimilation

Tags

NGSS.MS-LS2-3