S.7.SCA.5TH.TEST1.11-12 [5919]
Student
Class
Date
1. Soil organisms, fungi, worms, and bacteria, are all organisms in an ecosystem that
A. break down the remains of other organisms
B. remove nitrogen from the soil
C. help dissolve oxygen in the groundwater
D. pass on the Sun’s energy to plants
2. Some species of wildflowers in grassland areas have flexible, flat leaves, while
some species of grass have sharp leaves and thorns. What advantage might a grass
with sharp leaves and thorns have over wildflowers with flexible flat leaves?
A. attracting sunlight
B. cooling the plants
C. discouraging consumers
D. storing water
3. Some plants wilt during the hottest part of the day. This most likely helps the
plant by –
A. using less oxygen
B. making more food
C. resting the plant
D. conserving water
4. Which statement best describes the flow of energy in a food web?
A. Energy is shared equally among the organisms.
B. Energy is lost at each level of a food web.
C. Energy flows from larger organisms to smaller organisms.
D. Energy is gained at each level of the food web.
Note the circled organisms in the food web below.
5. Which statement best describes the difference in the roles of the organisms circled
in the food web above?
A. Producers make their own food; consumers cannot.
B. Producers compete for food; consumers cannot.
C. Consumers make their own food; producers cannot.
D. Producers can avoid being eaten; consumers cannot.
Plant Structure
Xylem
Phloem
Stomata
Main Function
Carry water throughout
plant
Carry nutrients
throughout plant
Control gas exchange
Shape
Hollow tube
Hollow tube
Lips
6. Based on the information in the table above, which of the following is most likely
true?
A. A plant would dry up without stomata.
B. Stomata are able to open and close.
C. Nitrogen and oxygen are carried by xylem.
D. Plants contain more xylem than phloem.
7. The leaves of the touch-me-not-plant, Mimosa pudica,
fold when they are touched. A plant folding its leaves
when touched is an example of response to a(n) –
A. lack of stimuli
B. over stimuli
C. external stimuli
D. internal stimuli
Compare the food web and food chain below.
8. Food webs provide a more complete picture of interactions in an ecosystem
because –
A. many animals have more than one food source
B. how much an animal eats depends on its size
C. competition within a population can be observed
D. animal behavior can be observed
9. Which of the following most likely belongs at letter X in the food web above?
A. Bat
B. Flea
C. Vulture
D. Plant
10. Which energy transformation occurs during the process of photosynthesis?
A. Nuclear to mechanical
B. Chemical to sound
C. Light to radiant
D. Radiant to chemical
11. In the diagram above, which of the following correctly describes the amount of
energy available at A and B?
A. A= most amount of energy B= least amount of energy
B. A= least amount of energy B= most amount of energy
C. A and B= same amount of energy
D. A and B= infinite supply of energy
12. In the diagram above, the total energy found at the producer level is equal to 10
kilojoules. What is the total energy available to the secondary consumers?
A. 1000Kilojoules
B. 100Kilojoules
C. 1 Kilojoule
D. 0.1Kilojoules
13. In the food chain diagrams above, which one shows the correct direction of
energy flow?
A. 1
B. 2
C. 1 and 2
D. Neither
14. Which organism in the food chain above is a primary consumer?
A. Plant
B. Beetle
C. Catfish
D. Hawk
15. In an energy pyramid, if 10% of energy is transferred from a first level consumer
to a second level consumer, what happens to the remaining 90% of energy?
A. It is decomposed and used by producers.
B. It is lost as heat.
C. It stays within the first level.
D. None of the above.
16. What is a producer?
A. An organism that eats consumers to obtain energy.
B. An organism that breaks down plant and animal remains and waste.
C. An organism that provides energy to the Sun.
D. An organism that transforms the energy of the Sun to make food.
17. Organisms that capture and store solar energy in carbon containing compounds
such as glucose are A. Consumers
B. Carnivores
C. Decomposers
D. Producers
18. Which of these activities releases carbon dioxide into the atmosphere?
A. Photosynthesis
B. Precipitation
C. Solar radiation
D. Respiration
19. Which of these molecules is produced when glucose is broken down?
A. Sucrose
B. Water
C. Carbohydrates
D. Carbon dioxide
20. The organisms responsible for the breakdown of matter indicated by the letter “X”
in the diagram above would include:
A. Animals and plants
B. Plants and bacteria
C. Bacteria and fungi
D. Fungi and plants
21. Carbon dioxide enters the leaves of plants and is used to produceA. Nitrogen
B. Glucose
C. Hydrogen
D. Soil
22. A killer whale hunts, captures, and eats a seal. Which of the following best
describes the relationship between the whale and the seal?
A The whale is a producer and the seal is a consumer.
B. The whale is the prey and the seal is the predator.
C. The whale is the predator and the seal is the prey.
D. The whale is a host and the seal is a parasite.
23. Which of the following organisms is both a predator and a prey?
A. Heron
B. Fish
C. Snail
D. Insect
24. Which of the following best describes the roles of organisms found in this food
web?
25. Which of the following are consumers found in the food web?
A. Fox, grass, and hawk
B. Grass, rabbit, and fox
C. Rabbit, hawk, and fox
D. Rabbit, hawk, and bacteria
26. Which two organisms compete for the same food source?
A. Rabbit and fox
B. Shrew and rabbit
C. Bacteria and grass
D. Hawk and fox
27. If the fox population decreased due to habitat loss, which of the following would
most likely occur?
A. The shrew population would increase.
B. The rabbit population would increase.
C. The fox would begin to eat the grass.
D. The bacteria would no longer exist.
28. Which energy pyramid could be constructed using the food web above?
29. An ecologist in Antarctica near the South Pole is trying to construct a food web.
She already knows that phytoplankton are producers and krill are the primary
consumers. She records her observations of predators and prey in the table below;
a “+” shows that relationship exist between the two organisms. Which food web
correctly represents the data she collected in Antarctica?
Predators
Prey
Krill
Fish
Birds
Leopard
Seal
Krill Fish Birds
+
+
+
Leopard
Seal
+
+
+
30. What word should fill in box X in the diagram of the carbon cycle below?
A. Decomposition
B. Photosynthesis
C. Digestion
D. Phototropism