Earthquakes and Seismic Waves

What is an aftershock?

• Something that happens when you stick your finger near a socket.

• A smaller earthquake occurs after a larger earthquake.

• A larger earthquake that occurs before an earthquake.

• A device used to measure earthquakes

What is an earthquake?

• shaking and trembling that results from the movement of rock above the earth's surface.

• shaking and trembling that results from the movement of rock that is beneath the earth's surface

• rolling waves that are caused by the earth's gravitational pull

• eruption of magma from the earth's core that forms on land

Tags

NGSS.MS-ESS3-2

Check off the true statement (s) :

• Scientists are able to accurately predict EXACTLY when an earthquake might occur.

• Scientists are NOT able to accurately predict EXACTLY when an earthquake might occur.

• Stress builds up over time, so scientists are unsure of when stress or energy will release from the moving tectonic plates.

• An earthquake is a release of energy.

Tags

NGSS.MS-ESS3-2

Check which statement (s) is/are true:

• Seismic waves have the most energy farthest away from the earthquake.

• Seismic waves have the most energy closest to the point where the earthquake occurs.

• Seismic waves travel from the focus of the earthquake in all directions.

• Seismic waves travel from the focus of the earthquake only in one direction.

The epicenter of an earthquake is...

• the point IN the earth that is DIRECTLY ABOVE the focus.

• the point ON the earth's surface that is DIRECTLY ABOVE the focus.

• the point INSIDE the layer of magma where the aftershock occurs

• the point ON the earth's surface where a volcano forms

Tags

NGSS.MS-ESS3-2

The focus is...

• the area BENEATH the Earth's surface where rock that is under stress begins to break or move, it is the action trigger for an earthquake.

• the area ABOVE the Earth's surface where rock that feels stress on a fault causes the release of pressure

• the line on a seismogram that shows where an earthquake hit

• the device used to measure an earthquake

Tags

NGSS.MS-ESS3-2

Stronger earthquakes show what type of lines on a seismogram?

• longer lines

• lines with greater height

• shorter lines

• small lines

A longer vertical line on a seismogram means what?

• a weaker earthquake

• a shorter lasting earthquake

• a longer lasting earthquake

• a stronger earthquake

What is the first wave to arrive after an earthquake?

• P wave

• S wave

• Surface wave

• PS wave

What is the second wave to arrive after an earthquake?

• P wave

• S wave

• Surface wave

• W Wave