Maintaining Balance Part 1

Water temperature is a(n) ___ limiting factor in an ecosystem.

• abiotic

• biotic

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Amount of oxygen is a(n) ___ limiting factor in an ecosystem.

• abiotic

• biotic

Tags

NGSS.MS-LS1-5

Starfish are a(n) ___ limiting factor in an ecosystem.

• abiotic

• biotic

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the options correctly represents a food chain in a Pacific Northwest ecosystem?

• sea urchin --> kelp --> orca --> otter

• kelp --> sea urchin --> otter --> orca

• orca --> otter --> sea urchin --> kelp

• kelp --> otter --> orca

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

What does the term biodiversity mean?

• a wide variety of producers and consumers in an ecosystem

• only a few types of producers and consumers in an ecosystem

• an ecosystem composed mostly of producers

• an ecosystem composed mostly of consumers

Tags

NGSS.MS-LS2-5

An increase of biodiversity is normally a result of introducing an invasive species into an ecosystem.

• True
• False

Tags

NGSS.MS-LS2-4

What does the graph tell you about biodiversity between 1600 and 1959?

• biodiversity has increased
• biodiversity has decreased
• biodiversity has remained about the same
• not enough information to tell

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

NGSS.MS-LS4-1

A species that maintain biodiversity by keeping prey populations controlled are called...

• Introduced Species
• Apex Predators
• Invasive Species
• Keystone Species

Tags

NGSS.MS-LS2-2

Based on the graph shown, what is the effect of removing a keystone species from an ecosystem?

• biodiversity goes up

• biodiversity goes down

• biodiversity stays about the same

• not enough information to tell

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Based on the graph shown, how can you tell sea otters are a keystone species?

• as the sea otter population decreases, biodiversity increases

• as sea otter population decreases, biodiversity decreases

• changes in the sea otter population have little effect on biodiversity

• the sea otter population decreases due to the presence of urchins

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4