Plate Tectonics

Why do earthquakes and volcanoes occur along the Ring of Fire?

• A Ring of Fire increases convection in Earth's core.

• The Richter scale is less active around the Ring of Fire.

• The Ring of Fire is located along active plate boundaries.

• The Atlantic Ocean is surrounded by the Ring of Fire.

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Paul's favorite television show is a nature program called Volcano Hunters. Each week, a team of geologists travels to a different volcano to try to film an eruption. Where would the team most likely find an active volcano?

• near the North or South Poles

• Where the Earth's crust is the thickest.

• Where two tectonic plates meet

• anywhere along the equator

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NGSS.MS-ESS2-3

What changed the previously held scientific knowledge that the Earth had a hollow center?

• direct observations from scientists drilling completely through the Earth.

• information gathered from equipment in the ocean well before sea level

• data collected from scientists studying the cores of other planets

• observations of ground density through seismic wave anaylsis

What happens when two plates of different densities collide?

• The more dense plate fractures.

• The plate that is less dense fractures.

• The plate that is less dense subducts.

• the more dense plate subducts.

Which is a possible result of plates moving along a transform boundary?

• mountains belts

• convection

• volcanoes

• earthquakes

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NGSS.MS-ESS3-2

Scientists find a fossil of a fish on top of a mountain. What kind of evidence does the fossil provide scientists about the way this area might have changed over time?

• It shows that fish were once able to live without water.

• It shows that oceans can change quickly and become land.

• It shows that the animals found on the mountain today evolved from fish.

• It shows that the mountain may have once been under water and was raised by natural processes.

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What can be said about rock layers that contain the same index fossils but are found in different areas of the world?

• They formed during the same period of time.

• They formed during the different periods of time.

• They are still forming and are not yet finished.

• They were formed at the same location but one was moved.

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NGSS.MS-LS4-1

Greg made a list describing Earth's lithosphere.

1. Composed mainly of rock
2. Found deep within the Earth
3. Forms a nearly continuous shell
4. Interacts with the hydrosphere
5. Moves and flows like liquid

Which parts of Greg's list are incorrect?

• 1 and 2

• 1 and 4

• 2 and 5

• 3 and 4

Why is the mantle so important to the movement of Earth's plates?

• Earthquakes occur constantly in the mantle, which causes the plates to move.

• The mantle is made up entirely of liquid rock, on which Earth's crustal plates can float.

• Heavy metals in the mantle set up strong magnetic fields that attact and repel Earth's plates.

• Temperature differences in the mantle set up convection currents that help to drive the movement of Earth's plates.

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Which explanation describes why seafloor spreading occurs?

• Lithospheric plates join together under the ocean floor.

• Lithospheric plates are formed under the ocean floor.

• Lithospheric plates move apart under the ocean floor.

• Lithospheric plates rub together under the ocean floor.

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