1. An organism that feeds upon primary consumers is known as a _______.
2. Examine the following food chain and choose an organism that would best fill in
the blank portion.
Wheat
Mouse
[?]
Hawk
3. In the following food web, what organism(s) are producers, primary consumers
and secondary consumers?
4. Decomposers are organisms that get their energy by
5. Many organisms in an ecosystem compete with each other for resources. What
might different species of trees in a forest ecosystem compete for?
6. What does the following diagram illustrate?
Algae
Minnows
Salmon
Bear
7. Food webs show how energy is transferred among living things. A food web for a prairie
ecosystem is shown below.
If all of the worms were removed from this prairie ecosystem, which organisms would
have more energy available to them?
In this food chain, which organism should be the least common?
8.
9. Correctly show how energy cycles in an ecosystem?
10.All of the individuals of a species that exist in the same place and at the same time are
called _______.
11.
A food web is shown in the picture above. What would most likely happen if there was a
drought and the grass did not get enough water?
12.The harp seal lives on the polar ice sheets. What adaptation makes it best suited for
this environment?
13. Photosynthesis is a process in which _______ energy is converted to _______ energy.
14. Which statement below accurately describes the carrying capacity of any
ecosystem?
A. It does not affect the species of an ecosystem.
B. It is not affected by any abiotic or biotic resources.
C. It is completely dependent upon the food supply.
D. It is affected by both abiotic and biotic resources.
15. A certain population of bluebirds eats spiders as a major food source.
Which of the following ecosystem changes would impact this population of
bluebirds the most?
A. an increase in the fish population
B. an increase in the spider and insect population
C. a decrease in the number of daylight hours
D. a decrease in the rabbit population
16. Denise is studying an ecosystem at her local park. She makes a list of all the
abiotic and biotic parts of the ecosystem. Which of the following lists would be
correct for Denise's ecosystem?
A.
B.
C.
D.
17. Which of the following statements is true?
A. Temperature range is always a biotic component of an ecosystem.
B. Animals are always biotic components of an ecosystem.
C. Some plants are considered abiotic components of an ecosystem.
D. In many ecosystems, water is considered a biotic component of the ecosystem.
18. The carrying capacity of an ecosystem describes the maximum number of
organisms that can be supported by the water, food, shelter, etc., that is
available in that ecosystem.
What will be the most likely result if an ecosystem tries to exceed its carrying
capacity?
19. What might happen in an ecosystem if the population of one species grows
unusually fast?
A. Another species that eats the same food might also increase in population.
B. Another species that eats the same food might decrease in population.
C. The food that the species eats might start growing more quickly.
D. The predators that prey upon the growing species might begin to starve.
In an ecosystem, there are many factors that affect how many organisms can
20. survive there. What are some of those factors?
21. If surface or ground water in an ecosystem becomes polluted, what will happen
to the ecosystem?
22. In all environments, organisms compete with others for resources in the area.
What are some resources that are competed for among organisms?
23. Which is a nonliving factor that helps determine ecosystem type?
A. the number of insects present
B. the amount of water available
C. the kind of plants present
D. the kind of animals present
24. Which is a biotic factor within an ecosystem?
A. the space an animal has to live
B. carnivores that consume other animals
C. the amount of oxygen in the air
D. the amount of sunlight a plant receives
25. A fish tank is a type of human-made ecosystem.
Which of the following lists only biotic factors found in a fish tank ecosystem?
A. water filter, rocks, plants
B. fish, plants, snails
C. snails, tank, water filter
D. water, fish, constant temperature