ecosystems review

1. Ch. 18 Review

2. Ch. 18.1 Abiotic factors

3. Which term refers to the nonliving
things in an ecosystem?
A. climate factors
B. biotic factors
C. abiotic factors
D. atmospheric factors

4. Which term refers to the nonliving
things in an ecosystem?
A. climate factors
B. biotic factors
C. abiotic factors
D. atmospheric factors

5. Which of the following gases make
up 78% of Earth’s atmosphere?
A. Oxygen
B. Carbon Dioxide
C. Nitrogen
D. Water vapor

6. Which of the following gases make
up 78% of Earth’s atmosphere?
A. Oxygen
B. Carbon Dioxide
C. Nitrogen
D. Water vapor

7. Which of the following is a biotic
factor?
A. Atmosphere
B. Sunlight
C. Water
D. Bacteria

8. Which of the following is a biotic
factor?
A. Atmosphere
B. Sunlight
C. Water
D. Bacteria

9. Which of the following abiotic factors
is needed for important life processes,
such as releasing energy and
photosynthesis?
A. Atmosphere
B. Sunlight
C. Water
D. Soil

10. Which of the following abiotic factors
is needed for important life processes,
such as releasing energy and
photosynthesis?
A. Atmosphere
B. Sunlight
C. Water
D. Soil

11. Ch. 18.2 Cycles of Matter

12. What is the energy source for the
water cycle, causing water to
evaporate?
A. The ocean
B. The sun
C. Humans
D. The wind

13. What is the energy source for the
water cycle, causing water to
evaporate?
A. The ocean
B. The sun
C. Humans
D. The wind

14. What process releases water from the
leaves of plants?
A. Evaporation
B. Transpiration
C. Condensation
D. Precipitation

15. What process releases water from the
leaves of plants?
A. Evaporation
B. Transpiration
C. Condensation
D. Precipitation

16. Which process involves bacteria
converting atmospheric nitrogen to a
form organisms can use?
a. Nitrogen Absorption
b. Nitrogen Fixation
c. Nitrogen Retention
d. Nitrogen Stabilization

17. Which process involves bacteria
converting atmospheric nitrogen to a
form organisms can use?
a. Nitrogen Absorption
b. Nitrogen Fixation
c. Nitrogen Retention
d. Nitrogen Stabilization

18. How are nitrogen compounds in
organisms returned to the soil?
a. Decomposition and waste
b. Exhalation
c. Cellular respiration
d. Nitrogen fixation

19. How are nitrogen compounds in
organisms returned to the soil?
a. Decomposition and waste
b. Exhalation
c. Cellular respiration
d. Nitrogen fixation

20. The main reason for adding
manure to a garden is to increase…
a. Carbon
b. Nitrogen
c. Oxygen
d. Water

21. The main reason for adding
manure to a garden is to increase…
a. Carbon
b. Nitrogen
c. Oxygen
d. Water

22. Why do organisms need Nitrogen?
a. To release energy
b. An essential part of proteins & DNA
c. Important life processes such as growing
and reproducing
d. To create energy rich sugars

23. Why do organisms need Nitrogen?
a. To release energy
b. An essential part of proteins & DNA
c. Important life processes such as growing
and reproducing
d. To create energy rich sugars

24. During which process is oxygen gas
released into the atmosphere?
a. Chemosynthesis
b. Decomposition
c. Photosynthesis
d. Transpiration

25. During which process is oxygen gas
released into the atmosphere?
a. Chemosynthesis
b. Decomposition
c. Photosynthesis
d. Transpiration

26. What is created as a result of cellular
respiration, which is also known as a
cell’s energy source?
a. Light energy
b. ATP
c. Glucose
d. Carbohydrates

27. What is created as a result of cellular
respiration, which is also known as a
cell’s energy source?
a. Light energy
b. ATP
c. Glucose
d. Carbohydrates

28. What gas do animals release back into
the atmosphere as a result of cellular
respiration?
a. Carbon dioxide
b. Oxygen
c. Nitrogen
d. Methane

29. What gas do animals release back into
the atmosphere as a result of cellular
respiration?
a. Carbon dioxide
b. Oxygen
c. Nitrogen
d. Methane

30. During the carbon cycle, ____ take in
carbon dioxide from the atmosphere.
a. Detritivores
b. Consumers
c. Decomposers
d. Producers

31. During the carbon cycle, ____ take in
carbon dioxide from the atmosphere.
a. Detritivores
b. Consumers
c. Decomposers
d. Producers

32. What two things are required for
cellular respiration to take place?
a. Light energy and water
b. Oxygen and water
c. Glucose and oxygen
d. Glucose and carbon dioxide

33. What two things are required for
cellular respiration to take place?
a. Light energy and water
b. Oxygen and water
c. Glucose and oxygen
d. Glucose and carbon dioxide

34. Which process adds carbon dioxide to
the atmosphere by burning fossil
fuels?
a. Cellular respiration
b. Decomposition
c. Combustion
d. Mining

35. Which process adds carbon dioxide to
the atmosphere by burning fossil
fuels?
a. Cellular respiration
b. Decomposition
c. Combustion
d. Mining

36. Ch. 18.3 Energy in Ecosystems

37. Which process enables producers to
use chemical energy instead of light
energy to make food?
a. Chemosynthesis
b. Decomposition
c. Photosynthesis
d. Consumption

38. Which process enables producers to
use chemical energy instead of light
energy to make food?
a. Chemosynthesis
b. Decomposition
c. Photosynthesis
d. Consumption

39. What happens to the amount of
available energy when it is transferred
from one organism to another?
a. It remains the same
b. It increases
c. It is destroyed
d. It decreases

40. What happens to the amount of
available energy when it is transferred
from one organism to another?
a. It remains the same
b. It increases
c. It is destroyed
d. It decreases

41. What description should go next to the drawing
of grass to complete the food chain?
A. The zebra eats grass.
B. Scavengers, such as vultures, eat grass.
C. Grass is decomposed by sunlight and water.
D. Grass grows by absorbing nutrients from the soil.

42. What description should go next to the drawing
of grass to complete the food chain?
A. The zebra eats grass.
B. Scavengers, such as vultures, eat grass.
C. Grass is decomposed by sunlight and water.
D. Grass grows by absorbing nutrients from the soil.

43. Where are the producers found in
the energy pyramid?
a. Top level
b. Middle level
c. Bottom level
d. They are not in the pyramid

44. Where are the producers found in
the energy pyramid?
a. Top level
b. Middle level
c. Bottom level
d. They are not in the pyramid

45. Drought kills 70% of the plants in an
ecosystem. How might this affect
other organisms in the ecosystem?
a. Herbivores will starve
b. Producers will leave the area
c. Decomposers will starve
d. Scavengers will starve

46. Drought kills 70% of the plants in an
ecosystem. How might this affect
other organisms in the ecosystem?
a. Herbivores will starve
b. Producers will leave the area
c. Decomposers will starve
d. Scavengers will starve

47. Where do decomposers get their
energy?
a. From photosynthesis
b. From the remains of producers
c. From eating other living things
d. From the remains of living things

48. Where do decomposers get their
energy?
a. From photosynthesis
b. From the remains of producers
c. From eating other living things
d. From the remains of living things

49. In the food web below, which
organism is an apex predator?
a. Bird
b. Grasshopper
c. Owl
d. Grains

50. In the food web below, which
organism is an apex predator?
a. Bird
b. Grasshopper
c. Owl
d. Grains

51. In the food web below, what do
the arrows show?
a. Which food is being eaten
b. The direction energy is flowing
c. Which organism is a predator
d. The direction matter is flowing

52. In the food web below, what do
the arrows show?
a. Which food is being eaten
b. The direction energy is flowing
c. Which organism is a predator
d. The direction matter is flowing

53. In the food web below, which
organism would have 100% of
available energy?
a. Bird
b. Grasshopper
c. Owl
d. Grains

54. In the food web below, which
organism would have 100% of
available energy?
a. Bird
b. Grasshopper
c. Owl
d. Grains