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Date: ________________________________
Science 10: Ecosystems
Test Review
Key Terms and Concepts:
Ecosystem
Abiotic Factors
Biotic Factors
Symbiosis
Predation
Competition
Intraspecific Competition
Interspecfic Competition
Food Chains
Autotrophs
Producers
Heterotrophs
Consumers
Herbivore
Omnivore
Carnivore
Scavengers
Decomposers
Population
Limiting Factors
Density Dependent Factors
Density Independent Factors
Carrying Capacity
Sustainability
Ecological Footprint
Bioaccumulation
Biomagnification
Eutrophication
Greenhouse Effect
Deforestation
Draining Wetlands
Alien Species
Overexploitation
Biodiversity
Resilience
Monoculture
Ecosystem Services
Ecotourism
Connectivity
Paradigm Shift
Review Questions:
1.
2.
3.
4.
5.
What is an ecosystem?
What is the source of energy for an ecosystem?
How does this energy enter an ecosystem? (Hint: autotrophs)
How is the energy transferred through the food chains? What percentage is transferred?
Draw a food chain. Identify the trophic levels, primary/secondary/tertiary consumers, producers, herbivores,
carnivores.
6. Draw a food pyramid. Identify the producers and consumers.
7. Why are decomposers important?
8. Give one example of each of the following limiting factors:
a. Density-dependent
b. Density-independent
9. What is meant by "carrying capacity"?
10. Graph an exponential growth curve.
11. How might overcrowding lead to a reduction in population size?
12. Give an example of intraspecific competition and an example of interspecific competition.
13. How might an increase in the population of herbivores in a forest affect:
a. Other herbivores in the same ecosystem
b. Higher level consumers
14. Define and give an example of biomagnification.
15. Why would a pond next to a farmland not be a very healthy ecosystem?
16. Define the term sustainable.
17. Name some things that can be done to reduce our impact on the environment (decrease our footprint).
18. What effects can alien (introduced) species have on ecosystems?
19. Explain why an ecosystem with high biodiversity is healthier than one with low biodiversity?
20. What is biodiversity?
21. Define the term "paradigm shift" and give an example related to the environment.
22. Suppose that volcanic eruptions sent particles high into the air creating clouds of dust that filtered out the
sunlight for a period of one year. What might happen to various organisms in the ecosystem?
23. Why are wetlands helpful?
24. Why are insects important to ecosystems?
25. How can different areas around the world have similar ecosystems?
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Science 10: Ecosystems