Changing Ecosystems

A dam was built on the Colorado river and blocked the migration of fish. The fish population will likely...

• Stay the same

• Decrease

• Increase

• Increase then decrease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A new road was built to run through the Back Bay nature preserve. This is an example of what type of change to the ecosystem?

• chemical

• biological

• physical

• mechanical

Tags

NGSS.MS-LS2-4

Which are biological changes to ecosystems? (check all that apply)

• Hunting of a single species

• Deforestation

• Building roads

• Building dams

Tags

NGSS.MS-LS2-4

which is a population?

• The coyotes in the Back Bay

• All the organisms in Costa Mesa

• A single squirrel

• All organisms on earth

As you remove resources from an ecosystem, what happens to the population of an organism?

• It increases

• It stays the same

• It increases then decreases

• It decreases

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the greatest number organisms an ecosystem can support called?

• The carrying capacity

• Population size

• Non-native species

• Limiting factor

Tags

NGSS.MS-LS2-4

If all the mice in the Back Bay suddenly disappeared, the ecosystem would probably...

• collapse immediately

• not change

• change significantly

• stay healthy

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Only 100 deer can live in a certain forest because only 2,000 bushes grow for them to eat. The bush is what for the deer?

• Not important

• Poisonous

• A limiting factor

• A physical change

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Write a claim for the question: How do disruptions to the physical and biological components of an ecosystem affect the natural populations of organisms?

Tags

NGSS.MS-LS2-4

Give two pieces of evidence to support the claim: Changes to physical and biological components of an ecosystem affects populations in an ecosystem.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4