7.10ab

Which of these statements describes how the limestone layers were deposited?

• They were deposited in the ocean and moved inland during a flood.

• They were deposited at the beginning of an ice age when the sea level dropped.

• They were deposited over millions of years when the area was covered by an ocean.

• They were deposited rapidly when ocean water flooded the area after a meteorite impact.

Which of these explanations BEST describes the changes happening along the Mid-Atlantic Ridge?

• The South American and African plates are sliding past each other, making a transform boundary.

• The South American and African plates are colliding into each other, forming mountains along the ridge.

• The South American and African plates are spreading apart, allowing magma to rise and harden into new sea floor.

• The South American and African plates are spreading apart, causing sections of the sea floor to fall into the ridge and melt.

Tags

NGSS.MS-ESS2-3

Which explanation for the age of the ocean crust is supported by the data?

• Older ocean crust is being melted back into the mantle where the plates move apart.

• There are ripples on the ocean crust where the continental crust moved over the top of it.

• Ocean crust is older than continental crust so it shows that the continents are younger.

• New ocean crust is being formed at underwater locations where older crust moves away as plates move apart.

Tags

NGSS.HS-ESS1-5

Which statement explains how plate tectonics causes ocean basin formation?

• Ocean basins form when one plate moves over another plate.

• After an earthquake, the sea floor spreads and ocean basins are formed.

• As continental plates drift apart, an oceanic basin forms between them.

• Up-welling magma at convergent boundaries spreads out to create an oceanic basin.

List the steps of the scientific method

d

e

f

c

b

a

Form a hypothesis

Ask a question

Draw conclusions

Conduct experiment

Analyze results

Communicate results

How do hotspots explain the formation of the Hawaiian Islands?

• Plates slide away from each other, allowing magma to rise up into the crust.

• Plates slide toward each other, pushing up on one another, and resulting in the various islands.

• Magma erupts at various points as plates slide by each other, resulting in the various islands.

• Magma in the mantle rises into the crust, forming a hotspot, and breaks through the crust, forming a volcano.

Tags

NGSS.MS-ESS2-2

Why is the newest rock found in Sectors B & C?

• it is closest to the Mid-Atlantic Ridge where sea-floor spreading occurs

• it is farthest from the Mid-Atlantic Ridge where sea-floor spreading occurs

• it is closest to the shoreline where the land is at

Tags

NGSS.MS-ESS2-3

This image shows the ocean system before and after the impacts of fertilizer runoff. How have humans impacted the ocean system with fertilizer?

• Fish and other organisms have fed on the toxic fertilizers.

• Organisms that do not like fertilizer have moved away from the ocean area.

• Fertilizer removes oxygen from the ocean, and the organisms in the ocean cannot survive.

• Algae feeds on the fertilizer and grows excessively, blocking out light for other organisms.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

How does the change shown in the image impact the stability of the ocean system?

• With fewer fish present, the ecosystem becomes more stable.

• With more light and oxygen available, the ecosystem becomes less stable.

• With less oxygen and light and fewer different types of living things, the ecosystem becomes less stable.

• With less oxygen and light and fewer different types of living things, the ecosystem becomes more stable.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What layer has the oldest fossils?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3