1. Review by Lakshmi
Chapter 41

2. Which food chain correctly describes the flow of energy in an ecosystem?
A. grass-->cow-->human
B. caterpillar-->leaf-->human
C. cow-->grass-->human
D. leaf-->bird-->caterpillar

3. Rabbits eat grass and other Plants to survive, but they do not eat animals. What kind of animal are rabbits?
A. decomposers
B. carnivores
C. producers
D. herbivores

4. How do decomposers help other organisms in an ecosystem?
A. They are food for consumers.
B. Through photosynthesis they can make their own food.
C. They return nutrients back to the soil.
D. They eat plants.

5. What will happen if the number of mouse decreased in this food chain?
What is the difference between food chain and food web?

6. In what order do a hawk, grass, and rabbit form a food chain in a meadow?
A. hawk-->grass-->rabbit
B. grass-->hawk-->rabbit
C. rabbit-->grass-->hawk
D. grass-->rabbit-->hawk

7. Which of the following lists only consumers?
A. hawks, lizards, chipmunks
B. acorns, squirrels, rabbits
C. grass, chipmunks, eagles
D. mice, squirrels, grass

8. In this food web, is the
Bear a secondary consumer
Or tertiary consumer?
What is the only tertiary consumer in this food web according to the illustration?

9. An energy pyramid is used to show _________.   
the layout of organisms in any order seen fit B.
the amount of energy in the universe C.
the amount of energy at each trophic level

10. Which number on the diagram below shows the location of the secondary consumers?

11.   In an energy pyramid, which way does energy transfer?  
From the top of the pyramid to the bottom B.
From the bottom of the pyramid to the top C.
None of these D.
Both of these

12. Look at the following energy pyramid
Look at the following energy pyramid. If the producers have 7000 kcal of energy,
how much energy will be available for the Sheephead ?

13. Which level of this food pyramid represents the largest amount of organisms?
Producers, b) primary consumers, c) secondary consumers,
d) 3rd level consumers.

14. If birds eat insects that feed on corn, which pyramid level would birds occupy?

15. How can you reduce acid rain?A.
Walk when you can B.
Conserve energy C.
Choice A and B

16. Which of the following is a greenhouse gas that is released by human activities and speeds up global warming?
Petroleum
Natural gas
Carbon dioxide
Nuclear power

17. Which of the following human activities does NOT release
carbon dioxide into the atmosphere?
Deforestation
Fishing
Burning fossil fuels
Driving

18. As global warming increases, the intensity of what type of storm
That hits coastlines is predicted to increase?
Tsunami
Cyclone
Earthquakes
tornadoes

19. Rising water temperature is a result of global warming and may
eventually result increase in sea levels due to the dissolving of what?
Mountains
Wetlands
Riverbeds
Glaciers

20. 1.Draw a neat labeled diagram of a terrestrial chain showing all trophic levels
2. Draw a neat labeled diagram of a marine food chain.
3. Draw energy pyramid of prairie ecosystem

21. Which of the following is NOT a negative effect of global warming?
Larger fish population
New infectious diseases
Species extinction
Loss of coastal areas

22. What would happen if the number of mouse decreased in this food chain?
What is the difference between a food chain and a food web?

23. Which country emits most carbon dioxide?
Japan
United States
China
India

24. As air pollution continues to be released into the atmosphere,
What becomes more depleted, resulting in an increase of
Ultraviolet radiation on earth?
Oceans
Rainforest
Ozone layer
Carbon dioxide

25. To which group do the following belong to?
What would happen to the world without these organisms?

26. Can someone explain carbon cycle?
How humans have affected carbon cycle and what are the implications for future
Climate?

27. Learn the key processes
In water cycle.

29. Acid rain - Cause

30. Which organism is most affected by the application of DDT? Explain
What is the impact of DDT on animals, humans?