Environmental Changes

Is a large amount of water that covers normally dry land:

• flood

• fire

• erosion

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NGSS.MS-ESS2-4

Shorelines and beaches are worn away by: _________

• flood

• fire

• erosion

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NGSS.MS-ESS2-2

A foreign insect is introduced into the Texas. It eats a lot of leaves, and trees start to become leafless. Many different animals feed on the new insect, but even they cannot control its numbers. Eventually, trees begin to die. Why would a rapid increase of the new insect population cause certain species of herbivores to vanish or be fewer in number?

• They would not have enough to eat. 

• They would not have enough space to live.

• They would not have tree bark to eat.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

A manatee is a water-dwelling herbivore on the list of endangered species. If manatees were to become extinct, what would be the most likely result in areas where they had lived?

• Certain producer organisms would become more abundant in the area.

• Other manatees would move into the area and restore balance.

• Predators in the area would have more food to eat.

• The area would not be affected.

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NGSS.MS-LS2-1

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Scientists are concerned about overfishing of shark populations. Sharks feed on rays and rays feed on scallops. Without sharks, rays consume all the scallop beds. This situation demonstrates that:

• humans can improve an ecosystem by removing predators.

• humans can upset an ecosystem by removing species.

• reducing the shark population increases the quantity of scallops that can be taken.

• sharks are not important for the stability of the ecosystem.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A park is home to a large number of robins, squirrels and rabbits. The robins and squirrels live in the park’s trees. The robins feed on earthworms and insects that live on the ground. The squirrels eat the acorns produced by the park’s oak trees. The rabbits hide in the bushes and feed on the grass. Which factor would negatively impact the number of rabbits living in the park?

• Collecting acorns off the ground.

• Planting more trees.

• Removing park bushes.

• Removing the squirrels.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

There are many large-mouth bass, a type of fish, living in a small lake near Waco, Texas. How would increased fishing in the lake effect the lake ecosystem?

• Predators of the bass might starve due to loss of a food source

• The population of the bass’ prey would decrease.

• The bass would spend more time swimming near the surface

• Water level in the lake would decrease as more fishing took place

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NGSS.MS-LS2-1

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What factors would cause an increase in the Wolves population between 1969-1979?

• Disease(canine parvovirus)

• Decrease in the Moose population

• Tick infestation

• Mild winters

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of these populations is most likely to decrease if the number of grasshoppers decreases?

• plants

• frog

• praying mantis

• owl

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

when animals graze so much that the vegetation is damaged

• impact

• overpopulation

• overgrazing

• fertilize

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