NGSS.MS-LS2-4

Human activities that degrade ecosystems result in a loss of diversity of the living and nonliving environment.  Two ways in which humans frequently harm ecosystems and affect other organisms is through land use and pollution.

How does land use cause a reduction in biodiversity? 

• It decreases the space and resources available to certain species
• It causes herbivores to become carnivorous
• It provides a more hospitable living environment
• It causes all the natural Earth cycles to stop

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NGSS.MS-LS2-4

There are 3 species of birds on an island. Bird A has a heavy bill for eating big seeds and. Bird B has a sharply pointed bill for eating insects. Bird C has a sharp bill for eating insects and small seeds. If the insect population suddenly disappeared one season, which bird or birds would probably be least affected that season?

• Bird A
• Bird B
• Bird C
• Bird A and Bird B

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What alternative energy resource could be harmful to the environment which fish live in?

• biomass power
• wind power
• geothermal power
• hydroelectric power

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What are the effects of deforestation ?

• loss of habitat
• increased green house gasses 
• soil erosion and flooding
• all of the above

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NGSS.MS-LS2-4

Eagles nest high in dead trees. All of the dead trees in an area are knocked down during a flash flood. Why does the number of eagles in the area decrease?

• the eagles start nesting in live trees instead of dead trees

• the eagles no longer have a good place to build nests

• the eagles have more materials with which to build nests

• the eagles start nesting on the ground instead of in dead trees

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NGSS.MS-LS2-4

In the 1850s, Thomas Austin released approximately twenty-four rabbits from Europe into the Australian countryside. By 1900, tens of millions of rabbits were found all over the Australian continent. The warm Australian climate, abundant farmland, and crops provided the perfect habitat for the rabbits. The rabbits caused extensive damage to all vegetation, and the lack of plants increased soil erosion. Why were the rabbits so successful? 

• the rabbits competed with local herbivores for food
• the rabbits did not have natural predators
• erosion of soil benefited the rabbits
• diseases helped decrease rabbit populations

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NGSS.MS-LS2-4

Many fish die due to a drastic change in water temperature.

• Density-Dependent

• Density-Independent

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Who studies the effects of the environment on animal life?

• Soil Technician

• Wildlife Technician

• Wildlife Manager

• Ecologist

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NGSS.MS-LS2-4

Northern foxes can have different fur colors.

The foxes hunt squirrels for food. Foxes that have fur the same color as their environment are better at getting close to squirrels and catching them.

The diagrams below show three possible fox populations.

If their environment changes to have only brown dirt, which of the following fox populations will most likely survive?

• Populations 1 and 2 will most likely survive.

• Populations 2 and 3 will most likely survive.

• Only Population 2 will survive because it is the only population with variation.

• All the populations will survive because the foxes will change the color of their fur if they need to.

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NGSS.MS-LS2-4

Invasive species alter the ecosystem by a___________in number quickly,this leads to _____ food for the native  species. 

• increasing  less
• decline  decreasing

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