7.2A review

How would you describe subduction?

• When the oceanic crust slides over the continental crust

• When the continental crust slides under the oceanic crust

• When the oceanic crust slides under the continental crust

• The crust alternate which one slides under the other. No way to know what will happen.

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NGSS.MS-ESS2-3

The type of material that is melted with the mantle determines the type of rock we will find at a volcano. Scientists use this information to make predictions about future events.

• true

• false

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NGSS.MS-ESS3-2

VEI is measuring the amount of _____.

• How loud the eruption is

• the volume of lava flowing

• the amount of solid material emitted into the atmosphere

• how long the volcano erupts for

Which boundary forms new material?

• divergent

• convergent

• transform

• any boundary

As the size of the eruptions increase, the frequency of eruptions ____________.

• increases

• decreases

• stays the same

• no way to determine

In 100 years, the pattern of volcanoes will.....

• change dramatically with new volcanoes appearing

• stay similar in location as to what they are today

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NGSS.MS-ESS3-2

The Andes mountain range is the longest continental mountain range on Earth, stretching over 4000 miles along the western edge of the South American continent where it meets the Pacific Ocean (see the light gray area of the figure to the right). The mountain range is made up of many stratovolcanoes, some extinct and some active. A set of rock samples was collected from five different Andes volcanoes (shown by the white X’s in the figure). These rocks are all a similar gray color, and have the same composition. Geologists wonder if this huge mountain range was created by the same tectonic process. The linear pattern of volcanoes suggests the Andes mountain range could be located along a tectonic boundary. What type of plate tectonic boundary would you expect to find where oceanic and continental plates meet?

• A convergent boundary, because there’s really only one type of plate; an oceanic plate is the same as continental but is covered in water.

• A convergent boundary, because this type of boundary forms where ocean and continental plates meet.

• A divergent boundary, because volcanic activity only occurs near that type of boundary.

• A divergent boundary, because there’s really only one type of plate; an oceanic plate is the same as continental but is covered in water.

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NGSS.MS-ESS2-3

When oceanic crust melts with the mantle, _____ type of rock is created.

• basalt

• rhyolite

• andesite

• All types

Laki is a fissure volcano the formed in the middle of a plate.

• true

• false

Tephra is the solid material emitted into the atmosphere when a volcano erupts.

• true

• false

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NGSS.MS-ESS3-2