Page 53 - Science Course 3 (Book 1)

Mo2-L1: Key Concept Organizer

Direction: On the line before each statement, write T if the statement is true or F if the statement is false.
If the statement is false, change the underlined word(s) to make it true. Write your changes on
the lines provided

1. A garden is an example of an ecosystem.

2. Ecosystems contain only the living parts of the environment in a given area .

3. The living parts of an ecosystem are called abiotic factors.

4. The abiotic factors of an ecosystem determine what kinds of organisms can live there.

5. The living or once-living parts of an ecosystem are called biotic factors.

6. Abiotic factors include living organisms, wastes produced by living organisms,
and the decayed remains of dead organisms.

7. Many organisms, including water lilies and dragonflies, cannot survive in wetland ecosystems.

Mo2-L1: Key Concept Check

Direction: On the line before each statement, write the letter of the phrase that matches it correctly. Each
phrase is used only once.

1. Every species lives . A. forms a population

B. interacts with the abiotic and
biotic factors in its habitat
2. Each species of dragonfly in a wetland ecosystem . to survive

C. in a particular habitat

3. Different species in a particular habitat . D. have different ways of
using the resources

E. benefit from the
4. A niche is the way a species . relationship

F. caught and eaten by a
predator
5. Prey is an organism that is .
G. benefits from the
relationship

6. In mutualism, both species . H. benefits and the other
is harmed

7. In commensalism, one species .

8. In parasitism, one species .

45