Science 20F: Ecosystems Exam Review
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Grade 10 Science Review: Ecosystems
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Date: _______________________
Define the following terms: ecology, ecosystem, environment, abiotic, biotic,
producer, consumer, heterotroph, autotroph, herbivore, carnivore, omnivore,
detritus, scavenger, decomposer, trophic level, community, population, species, biotic
potential, carrying capacity, population density, and percent growth.
Name 3 things that are abiotic, and three that are biotic.
What are the three types of consumers?
What is the difference between a community and a population?
Define the three types of relationships between organisms (commensalism,
parasitism and mutualism), and give an example of each.
What is biodiversity?
What percentage of energy in food chains passed on from one level to the next?
What is the difference between a food chain and a trophic level?
What is the difference between a food chain and a food web?
What is the trophic level of tertiary consumers?
What is the difference between an open and a closed ecosystem?
What is a biogeochemical cycle?
Describe the carbon cycle
Describe the nitrogen cycle
What are the three methods in which plants absorb nitrogen
What forms of nitrogen are usable for plants?
Describe the oxygen cycle
What is bioaccumulation? Describe an example of bioaccumulation and its
consequences.
Describe the effects of introducing a new species into an ecosystem. Use an
example in your description.
Define and give examples of the three types of population distributions (clumped,
random & uniform)
If there are 500 groundhogs in an area measuring 20 km by 25 km, what is the
population density?
Growth involves four issues, what are they?
What is the formula for percent growth?
If a population of polar bears was 200 and over the next year the following events
happened, calculate the growth rate.
• There were 50 births and 36 deaths
• 20 polar bears came to the community, 68 left
Using the answer from #24, what is the new population and new population density
after the first year? The area inhabited by the bears is 25 km by 20 km.
What does biotic potential mean?
Identify 4 factors that affect biotic potential
What are some abiotic limiting factors on a population.
What are some biotic limiting factors on a population.
Science 20F: Ecosystems Exam Review
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30. What is the difference between density dependent and density independent limiting
factors for a population, give an example of each.
31. What are the four factors that affect the carrying capacity of an ecosystem?
32. Use the food web below to answer the questions:
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Name a producer
List 2 organisms in the second trophic level
List 2 secondary consumers
What would happen to the Maned Geese if the Ants disappeared?
What organism(s) are at the top of the food web?