Unit 7 ecosystems review

Which of the following images best model how populations,

communities, and ecosystems interrelate?

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Based on the table, which statement describes the

interrelationship among these organisms?

• Speckled Trout and Mosquito Fish are likely competing with each

  other for food.

• Crocker and Mosquito fish are likely competing with each other for

  food.

• Speckled Trout and Black Drum are likely competing with each other

  for food.

• Crocker and Black Drum are likely competing with each other for

  food.

One year, the oak trees in First Landing State Park in Virginia

Beach began producing more acorns than usual. The next year,

the population of chipmunks in the park also increased. Which

explains why there were more chipmunks the next year?

• Shady areas increased.

• Food sources increased.

• Oxygen levels increased.

• Available water increased.

After researching the local environment students identified native

plants and animals.

Groups:

(a) Native Plant or Animal

,

(b) Not a Native Plant or Animal

• white-tailed deer

• Palm tree

• walrus

• flamingo

• black bear

• dogwood tree

The students worked in groups to construct a local food web

within a forest. Which organism could provide the energy for the

mouse in this food web?

• an eagle

• a fox

• the grass

• an owl

Two fourth grade students constructed a food web demonstrating

the flow of energy through a local ecosystem. Which food chain

shows one complete pathway in which energy flows through the

food web below?

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Groups of students worked together to research plants and

animals in a local environment. One group of students selected a

local waterway important to the Hampton Roads area, the Atlantic

Ocean. An illustration of the food web they consructed is shown

below. Which part of this food web will be directly affected if the

algae stops growing?

• phytoplankton

• baleen whale

• krill

• cod

The students researched and constructed a food web

demonstrating the flow of energy through a local ecosystem.

Analyze the food web and answer the question.The owls in this food web would be MOST affected by a decrease

in -

• finches

• acorns

• berries

• voles

During its life cycle, an organism’s niche may change. What an

animal eats, what eats it, and other relationships may change. For

example, tadpoles live in​ _

​ (a)   breathe through​ (b)   _and are mostly herbivores. However, adult frogs

live primarily on​ (c)   and

are carnivores.

• Water
• land
• gills
• lungs
• lilly pads

A food web illustrates the interconnected and overlapping food

chains in an ecosystem. The arrow in a food chain always points to

the organism doing the eating. These arrows show the flow of energy

within the food chain.

The students in Mr. Kim’s class researched native plants and animals

and created a model of a local food web. Analyze the food web in

Figure 1, to explain how changes in one part of the food web would

affect other organisms.If the hawk population decreased significantly, how would this

affect the food web?

• The hawk population dying would not affect the food web.

• The fox would have more rabbit to prey on.

• The owl population would increase.

• The snake population would decrease.