3.4 Study Guide

Question 1

True or False: Photsysnthesis is a process by which animals get their own fod from carbon dioxide and water by using chemical energy.

Answer 1

False: PPhotsysnthesis is a process by which not animals but plants get their own fod from carbon dioxide and water by using chemical energy.

Question 2

Define the process of denitrification?

Answer 2

It is the process by which converts nitrant and nitrates back into nitrogen gas in the atmospere.

Question 3

What is an example of a main abiotic reservoir?

Answer 3

It is usally the atmosphere but for the phosphurus cycle it is the underwater phosphate reserve.

Question 4

What is the pathway of the processes in the nitrogen cycle?

Answer 4

They are nitrogen fixation, nitrification, denitrification, decay and putrefaction.

Question 5

What is the difference between the movement of energy and matter through an ecosystem?

Answer 5

Energy enters an ecosystem as sunlight and flows out in the form of heat/chemical energy while matter is recycled continuesly throughout the ecosystem.

Question 6

Compare and contrast the carbon, nitrogen, and phosphorus cycles.

Answer 6

Some similarites between them is that they all go through the ecosystem and are continuous. Some differences are carbon and nitrogen are found in the atmosphere while phosphorus is found underground and phosphorus has no gas form unlike carbon and nitrogen.