Plate Boundaries, Earthquakes and Volcanoes

What is the scale used to measure the magnitude of an earthquake?

• Seismic scale

• Moment magnitude scale

• Mercalli scale

• Richter scale

This is created by earthquakes that occur on the ocean floor.

• longshore current

• gulf stream

• tsunamis

• high tide

Tags

NGSS.MS-ESS3-2

What type of volcanoes form from wide thin layers of lava?

• cinder cones

• composite volcanoes

• shield volcanoes

• lava domes

Which type of volcano is built by alternating layers of lava flows and ash flows? It can

be very explosive.

• Cinder Cone

• Composite

• Lava Dome

• Shield

Where do most earthquakes and volcanoes happen?

• mid-ocean ridges

• plate boundaries

• in the mantle

• rift valley

Tags

NGSS.MS-ESS3-2

Earthquakes generally occur at plate boundaries, where

• stress on rocks is greatest

• the most rock is found

• stress on rocks is low

• magnetic pull is greatest

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

The point on the earth’s surface directly above the origin of the earthquake.

• Epicenter

• Focus

• Foreshock

• Caldera

A tool used to measure and record earthquake activity

• laser beams

• Richter scale

• seismograph

• tiltmeter

Do two colliding continental plates always cause volcanoes?

• No, earthquakes always occur when two continental plates collide

• Yes, subduction always occurs when continental plates collide

• No, usually no subduction occurs when continental plates collide

• Yes, subduction always occurs when oceanic plates collide

What is formed when a magma chamber empties and collapses?

• a crater

• a fissure

• a caldera

• a vent

Tags

NGSS.MS-ESS2-1