1. Organisms Adaptations and their Ecosystems
7th Grade Science
Organisms Adaptations and their Ecosystems

2. A unit consisting of all the living #1
A unit consisting of all the living
and nonliving things in a given area
that interact with one another. A:
biosphere B:
ecosystem C:
community D:
population

3. B. ecosystem

4. Living things in an ecosystem.#2
Living things in an ecosystem. A:
abiotic B:
ecology C:
ecosystem D:
biotic

5. D. Biotic

6. Non-living things in an ecosystem.#3
Non-living things in an ecosystem. A:
abiotic B:
biotic C:
ecology D:
ecosystem

7. A. Abiotic

8. #4 *Volcanic eruptions breaking the surface of the ocean.
*Lichens move in on an area of bare rock.
These are examples of ________ _________. A:
Primary succession B:
Secondary succession C:
Both D:
Neither

9. A. Primary succession

10. #5 *Farmer plows a field and leaves it unattended.
*Hurricane destroys a
Coastline.
*Forest re-grows after a
forest fire.
These are examples of
________ _________. A:
Primary succession B:
Secondary succession C:
Both D:
Neither

11. B. Secondary succession

12. #6 This process is an example of _______ ________. Primary succession
Lichens break down the rock with a mild acid.
A thin layer of soil is formed.
Lichens grow on bare rock.
Grasses begin to grow
on the soil.
This process is an example of _______ ________.
Primary succession
Secondary succession
Decaying organic matter forms a thicker layer of soil.
A forest is formed.
Trees with deeper roots grow in the deeper layer of soil.
Small shrubs begin to grow.

13. A. Primary succession

14. What is the major difference between primary and secondary succession?#7
What is the major difference between primary and secondary succession?
Primary begins on bare rock.
Secondary begins when soil is already present.
Secondary begins on bare rock.
Primary begins when soil is already present. A: B: C:
Both D:
Neither

15. A. Primary begins on bare rock.
Secondary begins when soil is already present.

16. #8
How would secondary succession affect an area that was destroyed by a hurricane?
The area would re-grow starting with lichen
The area would re-grow starting with grasses-trees-forest A: B: C:
The area would never re-grow D:
None of these

17. The area would re-grow starting with grasses-trees-forestB.
The area would re-grow starting with grasses-trees-forest

18. An ecosystem that is in balance.#9
An ecosystem that is in balance. A:
Primary community B:
Succession community C:
Climax community D:
None of these

19. C. Climax Community

20. #10
How might a cloud of ash from a volcanic eruption that blocks out the sun effect ecosystems? A:
Increase temperatures B:
Lower temperatures C:
Slow the rate of plant growth D:
B and C

21. Slow the rate of plant growth
Lower temperatures
Slow the rate of plant growth

22. *Ecological succession helps to maintain equilibrium in an ecosystem.
#11
*Ecological succession helps to maintain equilibrium in an ecosystem.
How would secondary succession help to restore equilibrium after a flood? A:
It increases the number of types of species B:
It prevents other species from arriving. C:
It slows the rate of plant growth D:
B and C

23. A. It increases the number of types of species

24. An adaptation of an organisms body.
#12
An adaptation of an organisms body. A:
Behavioral adaptation B:
Structural adaptation C:
Climax adaptation D:
None of these

25. B. Structural adaptation

26. An adaptation of actions that organisms develop to survive.
#13
An adaptation of actions that organisms develop to survive. A:
Behavioral adaptation B:
Structural adaptation C:
Climax adaptation D:
None of these

27. A. Behavioral adaptation

28. #14
African wildebeests migrate across grass lands. What might cause them to migrate farther than normal? A:
Too much grass B:
A drought C:
Both D:
Neither

29. B. A drought

30. What might happen if an organism is unable to adapt to its ecosystem?
#15
What might happen if an organism is unable to adapt to its ecosystem? A:
It will survive anyway B:
It might become extinct C:
Both D:
Neither

31. B. It might become extinct

32. #16 These are examples of _____ _____.
A camel’s hump
A giraffe’s long neck
A monkey’s opposable thumbs
Bison’s hooves
These are examples of _____ _____.
A. Structural adaptation B. Behavioral adaptation

33. A. Structural adaptation

34. #17 These are examples of _____ _____.
Fish swimming in a school
Wildebeest traveling in herds
Monarch butterflies migrating to Mexico
Skunks active at night
These are examples of _____ _____.
A. Structural adaptation B. Behavioral adaptation

35. B. Behavioral adaptations

36. #18
You would find the most animal diversity in a meadow with a pond compared to a just a meadow.
Why?
The meadow and pond have different ecosystems and overlapping ecosystems
The Meadow and pond have only one ecosystem with fewer overlapping ecosystems A:
B:: C:
Both D:
None of these

37. A.
The meadow and pond have different ecosystems and overlapping ecosystems

38. What causes animals to be diverse or different from each other?
#19
What causes animals to be diverse or different from each other?
Adapting to their environment is not important
They must adapt to their environment A: B: C:
Both D:
Neither

39. They must adapt to their environmentB.
They must adapt to their environment

40. *A nonnative animal is introduced into a mature ecosystem.
#20
*A nonnative animal is introduced into a mature ecosystem.
*The animal will increase in the new community if ____.
the nonnative animal has several natural enemies
the nonnative animal has no natural enemies A: B:
the nonnative animal can learn to behave like the native animals C: D:
Neither

41. the nonnative animal has no natural enemies.B.
the nonnative animal has no natural enemies.

42. *What happens to the native plant species in this ecosystem?
#21
*The weeds in this picture thrive and are able to take over the yard because it has no natural enemies.
*What happens to the native plant species in this ecosystem? A:
They decrease B:
They increase C:
Both D:
Neither

43. A. They decrease

44. Ex: In the left picture, the snakes begin to die from a disease.
#22
In order for an ecosystem with high biodiversity to recover, what would organisms need to do if one food source became unavailable?
Ex: In the left picture, the snakes begin to die from a disease. A:
Move to a different ecosystem B:
Eat different food sources C:
They would die D:
None

45. B. Eat different food sources

46. #23
Look at the graph.
The population of rabbits decreased greatly between points A and B on the graph. Explain why this change occurred.
A disease, limited resources, or some other limiting factor caused the rabbit population to decrease to decrease.

47. Great Job!!!!
Thank you for playing!