Name: 
 

Quiz 1.2 - Ch 3 -  Practice Quiz



Completion
Complete each statement.
 

 1. 

Autotrophs capture energy from sunlight or ____________________ to produce food.
 

 

 2. 

Organisms that break down organic matter and return it to the environment are called ____________________.
 

 
 
nar001-1.jpg

Figure 3-1
 

 3. 

Of the organisms represented in Figure 3-1, the organisms in the oceans with the smallest total biomass are most likely the ____________________.
 

 

 4. 

Water can enter the atmosphere through the processes of evaporation and ____________________.
 

 

 5. 

Living organisms require nitrogen to make ____________________, which are used to build proteins.
 

 

Short Answer
 

 6. 

Describe the role of algae in ocean food chains.
 

 7. 

Describe the flow of energy among the following members of an ecosystem: decomposers, autotrophs, heterotrophs, and the sun.
 
 
nar002-1.jpg

Figure 3–2
 

 8. 

Describe the flow of energy to the owl in Figure 3-2 if the tree provides 1500 calories of energy to the insects.
 

 9. 

What is the most likely explanation for why Figure 3-2 shows only one organism at its base? In what way would an energy diagram be different?
 
 

nar003-1.jpg

Figure 3–3
 

 10. 

Explain how seepage and transpiration in Figure 3-3 are related.
 

Essay
 

 11. 

Describe the two sources of energy that fuel life on Earth.
 

 12. 

How does a food web differ from a food chain?
 

 13. 

Describe the three types of ecological pyramids.
 

 14. 

Describe the roles of bacteria in the nitrogen cycle.
 

 15. 

How might a large input of phosphorus affect a freshwater lake over time?
 

Other
 
 
USING SCIENCE SKILLS

nar004-1.jpg

nar004-2.jpg

Figure 3–4
 

 16. 

Predicting How might a large omnivore change the flow of energy in Figure 3-4, diagram II?
 

 17. 

Inferring If a limiting nutrient is supplied to the producers in Figure 3-4, diagram II, what effect could it have on the birds?
 

 18. 

Interpreting Graphics How many kilocalories (kcal) can the top carnivore in Figure 3-4, diagram I, store? Explain.
 

 19. 

Applying Concepts What three scientific approaches do ecologists use to explain complex relationships, such as in the energy pyramid in Figure 3-4?
 

 20. 

Applying Concepts Describe how chemosynthesis could contribute to the energy represented by Figure 3-4, diagram I.
 



 
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