Biogeochemical Cycles

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

• Oxygen

• Carbon Dioxide

• Phosphorus

• Nitrogen

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

• Nitrogen Fixation

• Denitrification

• Photosynthesis

• Weathering

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

Carbon can be found in...

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

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Organisms that do not decompose can be buried and become what?

• water
• nutrients
• air
• fossil fuels

Tags

NGSS.MS-ESS3-1

NGSS.MS-LS4-1

Respiration is the process by which animals take in _____ and release _____. 

• photosynthesis, air
• carbon, oxygen
• oxygen
• oxygen, carbon dioxide

Which is NOT a process of the water cycle?

• precipitation
• freezing
• transpiration
• evaporation

Tags

NGSS.MS-ESS2-4

Where are denitrifying bacteria found?

• In the soil
• Root nodules
• In dead things
• In the atmosphere

Tags

NGSS.MS-LS2-3

Which cycle are fossil fuels (oil, coal, natural gas) part of?

• carbon

• water

• nitrogen

• phosphorus

Tags

NGSS.MS-ESS3-1

NGSS.MS-ESS2-1