4.3 Performance Matter Ecosystems Review

All the living and nonliving parts in an environment are called the:

• Habitat

• Organism

• Population

• Ecosystem

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Which of the following correctly lists the nonliving parts of the diagram below?

• Butterfly, tree, wind, sun

  
  

• Deer, fish, duck, trees

  
  

• Soil, water, rocks, wind, sun

  
  

• Sun, wind, deer, fish

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Scientists noticed that there seemed to be fewer salmon migrating in the last few years. They wondered if increasing temperatures disrupt the life cycle of salmon. They made the observations you see in the table about water temperature and migration.

 

Based on the data in the table, which explains how water temperature affects migration?

• Warmer water temperature led to fewer salmon migrating.

  
  

• Warmer water temperature led to more salmon migrating.

  
  

• Colder water temperature led to fewer salmon migrating.

  
  

• The water did not impact the salmon migration.

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A nearby road department dug a big hole next to a road so that when it rained, the water would run off into a human-made pond instead of flooding the road and causing accidents. The workers connected the pond to a nearby stream so that when it got full, the extra water would flow out. Soon after the pond was built, the neighbors complained that the pond was attracting mosquitoes. Which solution will most likely solve the mosquito problem without causing a new problem? Mark the one best answer.

• Fill in the pond so that the mosquitoes will not have a place to lay their eggs

  
  

• Put a chemical in the pond so that all the mosquitoes will die

  
  

• Introduce a population of mosquito-eating fish from New York

  
  

• Increase the population of native dragonflies each spring to eat the mosquito larvae

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Study the desert food web.

Which animal would be most affected if the insect population were to drop suddenly?

• Small lizards

  
  

• Desert plants

  
  

• Large lizards

  
  

• Scorpions

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Meesha’s lawn is an ecosystem. It includes grass, soil, air, insects, earthworms, and birds. Meesha puts extra water and fertilizer on her lawn. Which parts of the ecosystem will likely change?

• No part of the ecosystem will change

  
  

• All parts will change because everything in the ecosystem is connected

  
  

• The soil will change, because it will become richer and moister

  
  

• The grass will change, because she wants the grass to grow by adding more water and fertilizer

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The greatest amount of energy in a community is found in the

• Decomposers

• Producers

  
  

• Consumers

• Consumers

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Based on the food web, which of these is a producer?

• Eagle

• Sparrow

• Rabbit

• Grass

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Which shows one way that energy flows to birds in this food web?

• rodents→insects→birds

  
  

• plants→rodents→birds

  
  

• snakes→rodents→birds

  
  

• insects→plants→birds

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The sun’s energy goes through the ecosystem, going from producers to consumers and back into the nutrient pool through decomposers. In the diagram below, which is an example of a decomposer

• The mushroom

  
  

• The boy

  
  

• The tree

  
  

• The duck

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