Chapters 3, 4, 5 & 6 Review
- What is ecology?
- What are biotic factors? Give several examples.
- What are abiotic factors? Give several examples.
- What is an ecosystem?
- How does matter flow through an ecosystem? How does energy flow
through an ecosystem?
- What is the main source of energy for the Earth?
- What is a food chain?
- How many organisms are found in a typical food chain? Why aren’t
there usually more?
- What is a trophic level?
- What type of organisms is found in the first trophic level?
Second? Third? Fourth?
- What is a food web?
- How much energy usually passes between tropic levels? What
happens to the rest of the energy?
- What is another name for a producer? Give several examples.
- What is another name for a consumer? Give several examples.
- What is a scavenger? Give several examples.
- What is a decomposer? Give several examples.
- Why are decomposer so important to an ecosystem?
- What usually happens to the numbers in a population as you pass
between trophic levels?
- What happens to the biomass as you pass between trophic levels?
- What is a habitat? What is a niche? Give an example of each for a
mushroom. For a bat. For a flower. For a predator like a lion?
- What is tolerance?
- What makes an ecosystem stable? Name five things that shape a
- What is the Competitive Exclusion Principle?
- What is a keystone species?
- What is symbiosis?
- Name the three types of symbiosis and give an example of each.
- Name two characteristics of an invasive species.
- Why do invasive species populations grow so quickly?
- Name five results of the introduction of invasive species into a
- Why are there cycles in nature?
- What would happen if matter did not recycle?
- Briefly describe the water cycle.
- What is transpiration? Excretion? Perspiration? Decomposition?
- Briefly describe the carbon cycle.
- What is a greenhouse gas? Give an example of a greenhouse gas.
- How are fossil fuels formed? How do fossil fuels return carbon to
the carbon cycle?
- Briefly describe the nitrogen cycle.
- What is nitrogen fixation? Name three ways nitrogen can be “fixed”.
- What is denitrification?
- Briefly describe the phosphorus cycle.
- What is a population?
- Name three characteristics of a population.
- What three factors affect the population growth?
- What does the age structure of a rapidly growing population look
- What is exponential growth? What does a graph of exponential growth
- What is logistic growth? What does a graph of logistic growth look
- What is carrying capacity?
- What do limiting factors do?
- What are density-dependent limiting factors? Give three examples.
- What are density-independent limiting factors? Give three
- What is biodiversity?
- Name three types of biodiversity.
- What is the benefit of biodiversity in an ecosystem?
- Name five threats to biodiversity.
- Name several ways that biodiversity is a natural resource.
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