Global Impacts of Plate Tectonics

Can volcanic eruptions cause temporary cooling of the atmosphere?

• yes

• no

Tags

NGSS.HS-ESS2-4

NGSS.HS-ESS3-5

The Aleutian Islands (Alaska) are volcanic islands that form an arc at the boundary between two converging tectonic plates. What is happening to one of the plates here – that provides a source of magma for the formation of these volcanic islands?

• The plates are spreading apart from each other, allowing magma to rise from the mantle.

• The plates are converging at a subduction zone. One is going back into the mantle, providing magma for the eruptions.

• The plates are sliding past each other at a transform boundary.

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What forms in front of the island arc where two oceanic plates collide? 

• a mantle plume

• a deep sea trench

• a coral reef

• an atoll

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Iceland sits atop the Mid-Atlantic Ridge – which is a site of plate divergence. Plate divergence is where tectonic plates are pulling apart. What do you think caused the formation of Iceland?

• subduction of an oceanic plate

• subduction of a continental plate

• volcanic eruptions

• earthquakes forced a plate to rise

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

How did the Himalayas form?

• They are volcanic mountains that formed at a subduction zone.

• They formed along a divergent boundary beneath an ancient ocean.

• They formed when the Indian plate collided with the Asian plate

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Where do most earthquakes and volcanic eruptions occur?

• In the center of tectonic plates

• Along the boundaries between tectonic plates.

• Anywhere on Earth. There is no pattern.

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Earthquakes occur along faults - areas where rock has “cracked” due to stresses caused by plate motion. Can faults occur within the interior of a tectonic plate? If so, can earthquakes occur far from a plate boundary - like here in our state?

• No. They only occur at plate boundaries.

• Yes. They occur anytime there is movement along a fault.

Tags

NGSS.HS-ESS1-5

The point at ground level, directly above where the earthquake began, is called the ____.

• focus

• epicenter

• hypocenter

The point where the earthquake starts is called the ___________. 

• focus

• epicenter

• hypocenter

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Force is applied to the plates on either side of a fault. Stress builds up until the fault ruptures - releasing the accumulated energy. This is called ________.

• elastic rebound

• destressing

• an earthquake