Biogeochemical cycles

Which gas makes up 78% of our atmosphere?

• Oxygen

• CO₂

• Nitrogen

• Water vapor

Which nitrogen cycle process breaks down atmospheric nitrogen (N₂) and combines it with hydrogen or oxygen using bacteria or lightning strikes

• Nitrogen fixation

• Ammonification

• Nitrification

• Dentrification

After living organisms use nitrogen, decomposer bacteria convert it back to ammonia for plants to use through this process

• Nitrogen fixation

• Ammonification

• Nitrification

• Dentrification

Tags

NGSS.MS-LS2-3

This process converts ammonia into nitrites and nitrates for plants to use

• Nitrogen fixation

• Ammonification

• Nitrification

• Dentrification

Tags

NGSS.MS-LS2-3

Nitrogen compounds are converted back into atmospheric N₂ by bacteria and burning of fossil fuels through this process

• Nitrogen fixation

• Ammonification

• Nitrification

• Dentrification

The process of plants losing water through their leaves is called ____.

• condensation
• evaporation
• transpiration
• exhaling

What is the only process that removes carbon from the atmosphere?

• combustion
• cellular respiration
• photosynthesis
• decomposition

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

Respiration is the process by which ____________ is consumed and _______________ is produced.

• Carbon, Oxygen
• Oxygen, Carbon dioxide
• H20, oxygen
• Carbon, H2O

This process is responsible for most environmental problems of excess nitrogen and phosphorus entering streams, lakes and oceans.

• decomposition
• emissions from automobiles
• agriculture and house hold runoff
• photosynthesis