Chapters 3, 4, 5 & 6 Review

 

  1. What is ecology?

 

  1. What are biotic factors?  Give several examples.

 

  1. What are abiotic factors?  Give several examples.

 

  1. What is an ecosystem? 

 

 

  1. How does matter flow through an ecosystem? How does energy flow through an ecosystem?

 

  1. What is the main source of energy for the Earth?

 

  1. What is a food chain?

 

  1. How many organisms are found in a typical food chain?  Why aren’t there usually more?

 

  1.  What is a trophic level?

 

  1. What type of organisms is found in the first trophic level?  Second?  Third?  Fourth?

 

  1.  What is a food web?

 

  1.  How much energy usually passes between tropic levels?  What happens to the rest of the energy?

 

  1.  What is another name for a producer?   Give several examples.

 

  1. What is another name for a consumer?  Give several examples.

         

  1. What is a scavenger?  Give several examples.

 

  1.  What is a decomposer?  Give several examples.

 

  1.  Why are decomposer so important to an ecosystem?

 

 

  1. What usually happens to the numbers in a population as you pass between trophic levels?

 

  1. What happens to the biomass as you pass between trophic levels?

 

 

 

  1. 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?

 

  1.  What is tolerance?

 

  1. What makes an ecosystem stable? Name five things that shape a stable ecosystem.

 

  1. What is the Competitive Exclusion Principle?

 

  1. What is a keystone species?

 

  1. What is symbiosis?

 

  1. Name the three types of symbiosis and give an example of each.

 

  1. Name two characteristics of an invasive species.

 

  1. Why do invasive species populations grow so quickly?

 

  1. Name five results of the introduction of invasive species into a stable ecosystem.

 

  1. Why are there cycles in nature?

 

  1.  What would happen if matter did not recycle?

 

  1.  Briefly describe the water cycle.

 

  1. What is transpiration?  Excretion?  Perspiration?  Decomposition?

 

  1. Briefly describe the carbon cycle.

 

  1. What is a greenhouse gas? Give an example of a greenhouse gas.

 

  1. How are fossil fuels formed? How do fossil fuels return carbon to the carbon cycle?

     

  1. Briefly describe the nitrogen cycle.

 

  1. What is nitrogen fixation? Name three ways nitrogen can be “fixed”.

 

  1. What is denitrification?

 

  1. Briefly describe the phosphorus cycle.

 

 

 

  1. What is a population? 

 

  1. Name three characteristics of a population.

 

  1. What three factors affect the population growth?

 

  1. What does the age structure of a rapidly growing population look like?

 

  1. What is exponential growth? What does a graph of exponential growth look like?

 

  1. What is logistic growth? What does a graph of logistic growth look like?

 

  1. What is carrying capacity?

 

  1. What do limiting factors do?

 

  1. What are density-dependent limiting factors?   Give three examples.

 

  1. What are density-independent limiting factors?   Give three examples.

 

  1. What is biodiversity?

 

  1. Name three types of biodiversity.

 

  1. What is the benefit of biodiversity in an ecosystem?

 

  1. Name five threats to biodiversity.

 

  1. Name several ways that biodiversity is a natural resource.

 

 

 

         

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