Practice Gr. 8 Final

What happens to water at the ocean’s surface as it moves from the equator toward the Arctic Ocean?

• The water cools, causing its density to decrease.

• The water cools, causing its density to increase.

• The water cools, causing its humidity to decrease.

• The water cools, causing its humidity to increase.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

The list below describes the characteristics of the forelimbs of an American toad and a bottlenose dolphin: - Each of the toad’s forelimbs has four fingers. The toad uses its forelimbs to grasp objects and walk. - The dolphin’s forelimbs are flippers with no fingers. The dolphin uses its flippers to change direction as it moves through water. - Both the toad’s and dolphin’s forelimbs contain bones that have many structural similarities. Which conclusion does this information best support?

• Random chance led to the development of two animals with different body structures.

• These animals evolved separately from their own unique ancestors and do not share a common ancestor.

• These animals share a common ancestor, and natural selection produced two animals that use their forelimbs for different purposes.

• The toad’s ancestors chose to be well-adapted to grasping, while the dolphin’s ancestors chose to be well-adapted to moving through water.

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NGSS.MS-LS4-2

How are viruses similar to parasites?

• Viruses and parasites cause diseases that cannot be prevented or treated.

• Viruses and parasites cause diseases that can be treated with fungicides.

• Viruses and parasites are multicellular organisms.

• Viruses and parasites require a host organism.

Based on the illustration of Timber Falls, which sedimentary rock layer is directly beneath the shale layer?

• Dolostone

• Limestone

• Sandstone

• Granite

Tags

NGSS.MS-ESS1-4

Why might Jody wonder about the forces that caused the cave to form behind the waterfall at Timber Falls?

• Because caves often form in areas with volcanic activity

• Because caves can be formed by the movement of water through rock layers

• Because caves are only found in deserts

• Because caves are always formed by earthquakes

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

If the water at Timber Falls is eroding the rock layers, which layer is most likely to be affected first based on its position in the illustration?

• Dolostone

• Shale

• Limestone

• Granite

Tags

NGSS.MS-ESS2-2

Which rock type has the highest relative hardness according to Figure 2?

• Dolostone

• Shale

• Limestone

• Sandstone

Jody learns that water moving over the falls formed the cave. Which choice best explains how the cave formed?

• The moving water deposited minerals in the shale, creating a cave.

• The moving water deposited minerals in the limestone, creating a cave.

• The moving water weathered the shale layer faster than the other layers, creating a cave.

• The moving water weathered the dolostone layer faster than the other layers, creating a cave.

Tags

NGSS.MS-ESS2-2

Jody notices a fossil of a dinosaur, Stegosaurus, discovered in the dolostone layer of Timber Falls. What can Jody conclude about when Dalmanites and Stegosaurus lived?

• Stegosaurus lived on Earth more recently than Dalmanites.

• Dalmanites lived on Earth more recently than Stegosaurus.

• Stegosaurus and Dalmanites lived on Earth at the same time.

• There is not enough information to know when these organisms lived.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Jody claims that moving water at Timber Falls caused the shale layer to weather. What evidence could be used to support her claim?

• Rock fragments containing magnesium were discovered upstream of Timber Falls.

• Rock fragments containing oxygen were discovered upstream of Timber Falls.

• Rock fragments containing calcium were discovered downstream of Timber Falls.

• Rock fragments containing silicon were discovered downstream of Timber Falls.

Tags

NGSS.MS-ESS2-2