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What causes convection currents to move within the mantle?

• Heat from the core causes material to become less dense and rise towards the surface and sinks after it reaches surface and cools

• Heat from the sun causes material to become less dense and rise towards the surface

• Heat from the sun causes material to become more dense and rise towards the surface

• Heat from the core causes material to become more dense and rise towards the surface

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Earthquakes release energy from the buildup of stresses. Once this energy is released, it is transferred though the Earth in the form of waves. The type of waves released by earthquakes are called

• Density waves

• Electromagnetic waves

• Stress waves

• Seismic waves

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When looking at the shape of the continental shelves that surround South America and Africa, it can be observed that the continental shelves fit together even though they are separated by the ocean. Which of the following best explains these observations?

• Ocean currents have eroded a similar pattern on the two coastlines.

• The continental shelves float on the ocean as it moves them back and forth.

• Land masses that form in similar situations usually have similar shapes.

• Convection currents separated the tectonic plates, separating these continents.

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List the steps of the scientific method

d

e

f

c

b

a

Draw conclusions

Conduct experiment

Analyze results

Communicate results

Ask a question

Form a hypothesis

What are the pieces of the Earth’s lithosphere divided into

• Continents

• Countries

• Plates

• Landmasses

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Most earthquakes and volcanoes occur in areas of the Pacific Ocean called "The Ring of Fire". Scientists agree that the reason for this is because ___.

• many convergent plate boundaries with subduction are located in those areas

• many convergent plate boundaries without subduction are located in those areas

• many divergent plate boundaries are located in those areas

• a large number of people live in these areas

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What is the geologic impact of two oceanic plates at a divergent boundary?

• Rift valley

• Mountains

• Mid-ocean ridges

• Volcanoes

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What plate boundary would produce mountains?

• Convergent, land vs land

• Divergent, land vs land

• Convergent, ocean vs land

• Transform, land vs land

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What is the geologic impact of two oceanic plates at a convergent boundary?

• making mountains and volcanic islands

• seafloor spreading, making a mid-ocean ridge and volcanic islands

• a trench and a rift valley

• Subduction, making a trench and volcanic islands

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At which type of plate boundaries could the geologic event of an earthquake occur?

• A Convergent Boundary

• A Divergent Boundary

• subduction

• All plate boundaries can

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