Limiting Factors

Two arctic fox are fighting with a polar bear for a sea lion carcass. One fox distracts the bear while the other eats. What type of limiting factor is the polar bear?

• Predator-Prey Relationships

• Competition

• Herbivory Effect

• Weather

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NGSS.MS-LS2-1

One of the wolf populations leaves the forest. Over time, bushes, trees and moisture begin to leave as well. There is an effect on the producer populations because the herbivores are overgrazing the land. What is the limiting factor to the producer?

• Competition

• The wolf

• Herbivory Effect

• Mutualism

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

One of the wolf populations begins to compete with a new bear population for the same herbivores. Over time, bushes, trees and rivers improve in numbers. There is an effect on the producer populations. What is the limiting factor to the herbivore?

• Predator-Prey Relationships

• Herbivory Effect

• Competition

• Wolves and Bears

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

A random cloud forms and fills the rivers with excess water. In one lake biome, the excess rain pulls trees into rivers destroying bird shelters. What is the limiting factor to the biome?

• density-dependent limiting factor

• Weather

• Climate

• Natural Disaster

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NGSS.MS-ESS3-2

NGSS.MS-LS2-1

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Which of these factors do not respond to the density of a population in an ecosystem?

• Density Dependent Limiting Factors

• Density Independent Limiting Factors

• Herbivory

• Competition

Limiting factors are sometimes helpful because they can keep the population from getting too large.

• True
• False

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

A snake is eaten by a hawk. The hawk is the _______.

• prey
• parasite
• predator
• all of these

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NGSS.MS-LS2-3

When there is a lack of resources such as food, water, sunlight, shelter, and space this is often called __________.

• limiting factors
• wet
• messy
• found in rocks

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

If the population of a certain predator increases, there is often _______ its prey

• a decrease the population of
• an increase of the population of 
• great news for its prey of
• no  impact found on

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

If a disease destroying barley plants in a field swept through an ecosystem, what would happen to the barley eating bird population in the the field ?

• The bird population would stay the same
• The bird population would infinitely increase
• The bird population would decrease

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NGSS.MS-LS2-1

NGSS.MS-LS2-4