The Carbon & Nitrogen Cycle

________ Extra nitrogen in the soil gets put back out into the air. 

_________This is part of the decaying process. When a plant or animal dies, decomposers like fungi and bacteria turn the nitrogen back in ammonium so it can reenter the nitrogen cycle

______ ______ is the first step in the process of making nitrogen usable by plants. Here bacteria change nitrogen into ammonium. 

As part of the carbon cycle, an animal breaks down food in a process called __________.

• digestion
• photosynthesis
• comubstion
• evaporation

What is the name of the process that breaks glucose down into smaller molecules and releases ATP energy for cells to use?

• Digestion
• Photosynthesis
• Comubstion
• Cellular Respiration

Carbon dioxide gas is __________ during cellular respiration.

• used up
• inhaled
• produced
• reacted with oxygen

True or False: Carbon dioxide from the air can be absorbed into bodies of water?

• True
• False

During photosynthesis, phytoplankton (tiny plants in water) use the sun's energy to convert _________ and water into glucose (food) and oxygen gas.

• hydrochloric acid
• nitrogen gas
• carbon dioxide gas
• octane

What kind of molecules formed as a result of plankton and other organisms being buried for many millions of years under a lot of heat and pressure?

• carbon dioxide
• crude oil
• glucose
• water

During __________, trees and other plants use the sun's energy, carbon dioxide, and water to make glucose and oxygen gas.

• photosynthesis
• cellular respiration
• mitosis
• combustion (burning)