8.9ab

The map below shows the locations of four active volcanoes in the Caribbean Sea. What do these volcanoes indicate about plate tectonics in the region?

• The volcanoes form an island arc, indicating a converging plate boundary.

• The volcanoes form a line, indicating a diverging plate boundary.

• Two plates are moving past each other, causing faulting and magma formation.

• Two plates are moving apart, creating new seafloor.

Answer explanation

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The diagram below shows a model of the movement of two tectonic plates. When the plates collide, one plate often moves below the other plate. The rising magma that can result from this type of plate movement may procedure-

• fossil layers

• volcanic islands

• deep-sea sediment

• seafloor spreading

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NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which student correctly identified the geologic process that formed the Himalayan mountains?

• Student 1

• Student 2

• Student 3

• Student 4

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NGSS.MS-ESS2-2

A mid-ocean ridtge separates the Pacific plate and the Nazca plate off the western coast of South America. Which statement best describes the relative motions of the Pacific and Nazca plates?

• The Pacific and Nazca plates are both moving to the east.

• The Pacific and Nazca plates are both moving to the west.

• The Pacific plate is moving to the west, and the Nazca plate is moving to the east.

• The Pacific plate is moving to the east, and the Nazca plate is moving to the west.

The image shows a plate boundary. Arrows have been added to indicate the movement of the plates. What plate boundary feature is also shown?

• A ridge formed by an inactive convergent boundary.

• A valley forming at an inactive divergent boundary.

• A fault forming at an active transform boundary.

• A volcano formed by an active transform boundary.

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NGSS.MS-ESS2-3

The San Andreas fault is a transform fault. The map below shows a student's approximation of where the fault line crosses through the United States. Students were asked to make maps predicting which way land would most likely move over thousands of years. Which map best predicts the likely movement of land along the fault line over thousands of years?

• 
• 
• 
• 

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The map shows some of Earth's plate tectonic boundaries. Based on the map, volcanic activity would most likely be found at-

• Location W

• Location X

• Location Y

• Location Z

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NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

The thick black lines on the map below show the locations of mid-ocean ridges. Which geologic feature is most likely to form at a mid-ocean ridge?

• Peninsula

• Volcano

• Delta

• Plateau

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The photograph shows mountains in the Andes range in South America. Which statement describes the geologic process that is most likely responsible for the formation of these mountains?

• They are along a transform plate boundary that is no longer active, so erosion is creating deep valleys.

• They are along a transform plate boundary in which plates are currently moving side by side, causing earthquakes and faults.

• They are along a plate boundary in which plates are currently converging, causing uplift and steep slopes.

• They are along a plate boundary in which plates diverged in the distant past, allowing new rock to build up.

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NGSS.MS-ESS2-2

The model below shows two continental plates. The folded mountains in this model form at which type of plate boundary?

• Transform

• Divergent boundary

• Subduction boundary

• Convergent boundary

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3