4.2

Question 1

Photosynthesis

Answer 1

producers-when light energy is converted to chemical energy

Question 2

Cellular respiration

Answer 2

consumers/producers turn O2 and glucose to energy CO2 and water to go back into the atmosphere.

Question 3

Nitrogen Fixation

Answer 3

nitrogen is converted to ammonia and ammonium and freed

Question 4

Denitrification

Answer 4

convert the nitrates and nitrites and return them back into the atmosphere.

Question 5

How does energy vs. matter move through a system?

Answer 5

Energy flows through the ecosystem and is not recycled, matter is recycled and stays in the ecosystem

Question 6

How are the carbon, nitrogen, and phosphorus cycles different?

Answer 6

They all flow the same way but they have different main reservoirs.

Question 7

How is the amount of carbon and energy similar in each trophic level? Why is this the case?

Answer 7

The higher trophic levels have less carbon and less energy. This is the case because most of the carbon and energy are lost through cellular respiration in every trophic level, although the carbon is lost as carbon dioxide and the energy is lost as heat. In addition to this, the carbon and energy go through many of the same processes throughout their cycles.