Environmental Science Unit 3 Test (Ecosystems)

The science or practice of planting, managing, and caring for forests.

• Forestry
• Silviculture
• Reforestation
• Deforestation

The process of replanting an area with trees.

• Forestry
• Silviculture
• Reforestation
• Deforestation

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NGSS.MS-LS2-5

Which of the following is an advantage of recycling garbage over burying waste in landfills or incinerating trash?

• Lowers cost

• Saves raw materials

• Reduces volume by 90%

• Generates energy

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NGSS.MS-ESS3-3

Mullet are local estuarine fish that move in schools and feed on plankton and plant matter. Natural predators of the mullet include spotted sea trout, sharks, pelicans and dolphins. The graph below shows how the number of mullet in an area has changed over time. Based on the data, one student concludes that a new predator was introduced into the area during this time period. Which of the following is a likely alternate explanation for the change in the mullet population

• mullet prey increased in the area
•  mullet parasites decreased in the area
• the temperature of the area increased
• the amount of aquatic plants in the area decreased

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How does the predator-prey relationship affect a population?

• The predators and prey are in competition with each other.
• Usually either the predator or the prey will become extinct.
• The predator species usually has exponential growth.
  
• The relationship controls the population size of both species

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Data on the immigration and emigration of a fish species would be most helpful in determining which of the following

• biological magnification
• interspecies competition
• population of the species
• predator-prey relationships

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When an environment has reached its carrying capacity for a certain population, which of the following is true?

• Growth and immigration rate is equal to death and emigration rate.
• Growth and immigration rate is greater than death and emigration rate
• Growth and immigration rate is less than death and emigration rate.
•  Growth rate is exponential.

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NGSS.MS-LS2-1

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The pH of the water in several lakes in Norway and Sweden had decreased to below 5.0 due to an increase in acid rain. Which of the following is most likely to happen in these lakes?

• the decline of several fish populations.
• an increase in numbers of fish
• an increase in the amount of primary producers
• increased predator-prey relationships

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Which of the following is a limiting factor in a population of organisms.

• reproductive replacement
• life spans of the members
• fluctuations in atmospheric temperature
• availability of food

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Which of the following are abiotic factors that shape ecosystems?

• worms, plants and temperature
• wind, precipitation, and soil type
• niches, trees, and bacteria
• sunlight, mushrooms, and wind

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NGSS.MS-LS2-3