MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

When considering food webs, which of these are producers?

a. birds

b. fungi

c. mammals

d. trees

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Study the list and then answer the questions by classifying the items according to the role they plan in food webs.

1. rose 7. aspen tree

2. mushroom 8. cougar

3. maple tree 9. weed

4. grass 10. hawk

5. antelope 11. snake

6. bacteria 12. frog

1. Which of these organisms are consumers?

a. antelope, cougar, frog

b. antelope, rose, weed

c. maple tree, cougar, snake

d. grass, hawk, frog

2. Which of these organisms are decomposers?

a. antelope, bacteria

b. mushroom, weed

c. aspen tree, maple tree

d. bacteria, mushroom

3. Which of these organisms are producers?

a. mushroom, antelope, aspen tree

b. rose, maple tree, weed

c. maple tree, grass, hawk

d. cougar, snake, bacteria

Correct Answers:

1. a

2. d

3. b

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Which of the following relationships would best describe a weasel eating a birdÕs eggs?

a. producer/consumer

b. predator/prey

c. symbiosis/mutualism

d. symbiosis/parasitism

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Which of the following relationships would best describe a man and his pet dog?

a. producer/consumer

b. predator/prey

c. symbiosis/mutualism

d. symbiosis/parasitism

Correct Answer: c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Which of the following relationships would best describe a cow eating grass?

a. producer/consumer

b. predator/prey

c. symbiosis/mutualism

d. symbiosis/parasitism

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Which of the following relationships would best describe a fox eating a duck?

a. producer/consumer

b. predator/prey

c. symbiosis/mutualism

d. symbiosis/parasitism

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Which of the following relationships would best describe a mosquito sucking blood from a deer?

a. producer/consumer

b. predator/prey

c. symbiosis/mutualism

d. symbiosis/parasitism

Correct Answer: d

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

In the ocean, large fish sometimes have their teeth cleaned by smaller fish. The smaller fish gets food and the larger fish gets clean teeth that are less likely to decay. This is an example of what type of relationship?

a. mutualism because both fish benefit

b. parasitism because one organism is harmed

c. predator/prey because one organism is hunted

d. competition between the two sizes of fish because of their size difference

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Gina was trying to model the flow of energy through an ocean ecosystem by using the pond behind their house. She observed fish, algae, water plants, frogs, aquatic insects, and various microorganisms living in the pond. She wants to order the organisms of her pond by how energy flows through them. Which would be the most correct ordering?

a. water plants ˆ frogs ˆ insects ˆ fish

b. algae ˆ microorganisms ˆ insects ˆ fish

c. fish ˆ water plants ˆ frogs ˆ microorganisms

d. algae ˆ fish ˆ frogs ˆ microorganisms

Correct Answer: b

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

What is missing in the above diagram of a food chain?

a. a mouse because an owl eats it

b. a tree because it is larger than the plant shown

c. a deer because it eats the grass

d. a hawk because it is a consumer

Correct Answer: a

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Use this diagram to answer the following questions.

1. Which level of the pyramid contains the most energy?

a. A

b. B

c. C

d. D

2. How much energy loss would be expected moving from level A to level B?

a. 1%

b. 10%

c. 50%

d. 100%

3. In what main form is energy lost as you move up the pyramid?

a. light energy

b. chemical energy

c. heat energy

d. nuclear energy

Correct Answers:

1. a

2. b

3. c

MC	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Suzanne wanted to better understand the effect of light on seed germination. She planted 8 seeds, 4 in each of 2 cups. She placed one cup in a dark closet and the other on a sunny window will. She gave the plants the same amount of water and observed them for a week. Which of the following would invalidate any data she collects?

a. She used different soils in each cup.

b. Nothing grew up in either cup.

c. She forgot to water all of the plants on day.

d. She didnÕt weight the seeds before she planted them.

Correct Answer: a

I	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Use this graph to answer the following questions.

1. What relationship do the rabbit and coyote populations have with each other?

a. they do not appear to be related

b. when one goes up the other goes up also

c. the coyote population responds to changes in the rabbit population

d. the rabbit population responds to changes in the coyote population

2. What determines the population of the coyotes?

a. the number of rabbits

b. the number of offspring

c. the coldness of the winter

d. the number of hawks

3. What can be inferred from the graph about year 6?

a. disease hit the coyote population, reducing their numbers

b. something happened to the rabbit population that decreased their numbers

c. something happened to the coyote population that decreased their numbers

d. rabbits were able to reproduce in greater numbers

Correct Answers:

1. c

2. a

3. b

I	8^th Grade Integrated Science	Standard: 02
Objective: 02. Generalize the dependent relationships between organisms.
ILO:

Farmer Joe raises corn. One of his fields produces a lot less corn than the others. He has tested the soil conditions and finds them the same as in his other fields. Tests also indicate that the plants are getting adequate water. He suspects that there may be some sort of pest damaging the crop. He believes in organic farming and does not want to start using poisons to control for pests.

1. Which of the following might be the best answer to his problem? An understanding of

a. how producers get their energy from the sun.

b. which predators/parasites might be used to kill the pests.

c. how chemical energy can be converted to mechanical energy.