biogeochemical cycle

The elements carbon, oxygen, hydrogen and nitrogen combined make up about 96% of our bodies (carbon is about 18%).  Carbon is necessary for life because it is a(n)

• uncommon element in all living things.
• element found only in the atmosphere
• excellent bonder
• is found mostly in dead things.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

During which phase of the nitrogen cycle do decomposers break down nitrates into ammonium?

• Ammonification
• Nitrification
• Denitrification
• Assimilation

Which of the following organisms plays a major role in all phases of the nitrogen cycle?

• Bacteria
• Fungi
• Plants
• Animals

During which phase of the nitrogen cycle do bacteria and lightning strikes convert  atmospheric nitrogen into a usable form?

• Ammonification
• Assimilation
• Nitrogen Fixation
• Nitrification

Tags

NGSS.MS-LS2-3

During which phase of the nitrogen cycle is nitrogen gas returned to the atmosphere?

• Ammonification
• Nitrogen fixation
• Nitrification
• Denitrification

Which off the following processes returns water vapor to the atmosphere?

• Evaporation and Condensation
• Evaporation and Precipitation
• Transpiration and Evaporation
• Transpiration and Precipitation

Tags

NGSS.MS-ESS2-4

Which nutrient does not cycle through the atmosphere in the form of a gas?

• Carbon
• Oxygen
• Nitrogen
• Phosphorus

Which of the following causes harmful algal blooms that result in dead zones in the ocean?

• Runoff of nitrogen and phosphorus-rich fertilizers
• Burning of fossil fuels
• Increased amounts of acidic precipitation
• Increased levels of greenhouse gases 

These gases, such as carbon dioxide, trap heat in the Earth's atmosphere causing global warming

• Global warming gases
• Hot House gases
• Green House gases
• Thermal pollution

Tags

NGSS.MS-ESS3-5

What cycle are fossil fuels part of ?

• carbon

• oxygen

• nitrogen

• phosphorus

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS3-4