Energy Cycles

Which of these is the most abundant gas in the air?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon Dioxide

Which is a product of photosynthesis?

• Oxygen
• Carbon Dioxide
• Water
• Nitrogen

What major macromolecules contain nitrogen and are necessary for all life?

• Proteins

• Carbohydrates

• Nucleic Acids

• Lipids

How is Nitrogen removed from the air and put into the soil in a form that living things can use?

• plants

• photosynthesis

• chemosynthesis

• nitrogen fixing bacteria

What is the process that plants use to absorb nutrients like nitrates?

• Ammonification

• Assimilation

• Denitrification

• Nitrification

In an energy pyramid, how much energy gets passed from one level to the next?

• 10%

• 100%

• none

• 1%

If plants die. What will animals run out of?

• carbon dioxide

• water

• oxygen

• sunlight

Which of the following is known as the "sedimentary" cycle because its reservoir is sedimentary rock?

• Water cycle

• Nitrogen cycle

• Phosphorus cycle

• Carbon cycle

How do animals get nitrogen?

• the atmosphere 
• eating other organisms
• rainwater
• lightning 

Tags

NGSS.MS-LS2-3

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

• Nitrogen fixation

• Ammonification

• Nitrification

• Dentrification