Fall 2020 Earth Sci Unit 2 PMA

Some constellations are more prominent in the night sky of North Carolina in winter, while other constellations are more prominent in the night sky in summer. Which best explains why this occurs?

• because of Earth revolving around the sun

• because of Earth’s rotation on its axis

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The diagram shows the difference in sunlight reaching Earth at Points 1 and 2.

Based on the diagram, what is another difference between Points 1 and 2?

• The pull from gravity will be greater at Point 2 than at Point 1.

• The region at Point 1 is experiencing summer while the region at Point 2 is experiencing winter.

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The Moon goes through phases as it revolves around Earth. During which phase of the moon would it be possible for a solar eclipse to occur?

• new moon

• full moon

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Which natural phenomenon occurs as a result of Earth rotating on its axis?

• day and night

• seasonal changes

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Along the west coast of South America, volcanic mountains are found due to movement along a plate boundary. The diagram illustrates the movement that is taking place.

Which is the MOST likely reason for the formation of the volcanic mountains?

• The volcanic arc is sliding from the continental crust into the trench.

• Oceanic crust collides with continental crust, heating as it subducts.

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Which feature results when plates of different densities converge and one plate slips under the other?

• a trench

• a ridge

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Which will most likely form when movement along a plate boundary forces a landmass to be pulled apart?

• continental mountains

• continental rift

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The surface of Earth is composed of large tectonic plates that are constantly shifting as they float on top of molten rock. Which process must occur in the mantle to make the plates move?

• convection currents

• seafloor spreading

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Which scale is used to report the intensity of an earthquake?

• Richter Magnitude Scale

• Modified Mercalli Scale

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The Mariana islands are volcanic islands that form an arc. The island arc is located in the North Pacific Ocean. These islands were formed by converging tectonic plates.

• melting of oceanic crust at subduction zones

• melting of oceanic crust at mid-ocean ridge

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