Chapter 8. Critical Analysis Question

Introduction

Questions 1 & 2

1. 1.

   Which organisms make up the base of the marine food web?

   A.

   Small fish

   B.

   Nutrients

   C.

   Phytoplankton

   D.

   Zooplankton

   Correct

   Incorrect

2. 2.

   Which of the following help to support phytoplankton growth and increased phytoplankton population size?

   A.

   Nutrients

   B.

   Cold water

   C.

   Zooplankton

   Correct

   Incorrect

Question 3

3. 3.

   Which of the following occur where there is coastal upwelling? Select all that apply.
   	Warm surface water is blown away from the coast, and cold water from the depth rises along the coast to fill the void.
   	Strong winds drive against the coastline, creating waves much higher than normal.
   	Water that is rich in nutrients rises to the surface.
   	Solar rays become much more intense, heating the surface water to temperatures much higher than normal.

   ::Warm surface water is blown away from the coast, and cold water from the depth rises along the coast to fill the void.: This upward movement of the cold, deep water gave rise to the term “upwelling.”::Strong winds drive against the coastline, creating waves much higher than normal.: With upwelling, winds tend to blow away from the coast, moving the warm surface waters toward the open ocean.::Water that is rich in nutrients rises to the surface.: Nutrients tend to settle to the bottom of the ocean, so when the cold water sweeps toward the surface it carries nutrients with it.::Solar rays become much more intense, heating the surface water to temperatures much higher than normal.: Solar ray intensity does not increase during upwelling. The warm surface waters instead are moved toward the open ocean and replaced by cold water from the deep.

Question 4

4. You now understand that phytoplankton makes up the base of the marine food chain and that their populations can increase when nutrient-rich waters, occurring from upwelling events along coastlines, are present. Now look at the map.

   

   4.

   Which of the following statements is true regarding the size of the upwelling region on either the east coast of Africa or the west coast of Africa and its resulting food chain influences?

   A.

   The area of upwelling is larger on the west coast of Africa, and the more extensive phytoplankton growth on this coast will lead to a greater abundance of organisms further up the food chain, including fish populations harvested by people.

   B.

   The area of upwelling is larger on the east coast of Africa, and the movement of cold water up to the surface along the coast tends to lessen the abundance of organisms in the coastal food chain, including fish populations harvested by people.

   C.

   The area of upwelling is larger on the east coast of Africa, and the more extensive phytoplankton growth in this region will lead to a greater abundance of organisms further up the food chain, including fish populations harvested by people.

   D.

   The area of upwelling is larger on the west coast of Africa, and the movement of cold water up to the surface along the coast tends to lessen the abundance of organisms in the coastal food chain, including fish populations harvested by people.

   Correct

   Incorrect

Critical Analysis Question

8.1 Activity Completed!