Test Prep Science

Less snow falls during a warmer-then-normal winter in the Yellowstone ecosystem. The thinner snow cover on the ground allows for more plants to be visible than when the snow cover is thick.

Describe how a winter with less snowfall might affect the population of elk.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Less snow falls during a warmer-then-normal winter in the Yellowstone ecosystem. The thinner snow cover on the ground allows for more plants to be visible than when the snow cover is thick. Some scientists predict that, over time, the average thickness of the snow cover in the Yellowstone ecosystem will decrease as global air temperatures increase. Predict a long-term effect of the reduced snow cover in the Yellowstone ecosystem on the beaver population. Be sure to support your prediction using evidence.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Scientists in a different area with an ecosystem similar to that of Yellowstone are considering different solutions for protecting trees in hopes of restoring the ecosystem to its previous levels of biodiversity. One scientist recommends placing fences that are two meters in height around areas of existing trees rather than introducing wolves to the ecosystem. Select one likely ADVANTAGE of using fences to protect the trees.

• young trees would be able to grow to maturity

• birds would have access to trees for building nests

• the elk population would increase as the adult tree population would increase

• beavers would be unable to access the trees for food and to build their shelters

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NGSS.MS-LS2-5

Which of the following best describes the ecological relationships of the organisms in the food web?

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

A student is investigating the process that changes steel into rust. According to the table, which of the beakers from Investigation 1 does not show evidence of a chemical change?

• Beaker X

• Beaker Y

• Beaker Z

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NGSS.MS-PS1-2

Which of the following describes what primarily causes the ocean tides?

• Convection from plate tectonics

• Gravity from the Moon and the Sun

• Convection from Earth's north and south poles

• Magnetism from Earth's north and south poles

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NGSS.MS-PS2-4

Which of the following shows the order of formation from oldest to youngest?

• W, X, Y, Z

• Z, Y, X, W

• W, Y, X, Z

• Z, X, Y, W

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NGSS.MS-ESS1-4

Given the Punnett square for the traits of rounded seeds (dominant R) and wrinkled seeds (recessive r), what is the probability that an offspring will have rounded seeds?

• 0

• 1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which of the following best explains why the engineers used concrete to build this part of the bridge?

• Concrete is low in density so this part of the bridge can float on top of the water.

• Concrete is heavy so this part of the bridge can move back and forth in the wind.

• Concrete is low in density so this part of the bridge can move back and forth in the wind.

• Concrete is high in strength so this part of the bridge can support a large amount of weight.

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NGSS.MS-ETS1-1

Two pea plants are crossed. Each parent has a dominant allele for height (H) and a recessive allele for height (h).

Which of the following shows the expected percentage of each genotype for the offspring of these parents?

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Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2