Show:
Earthquake Vocab
Understanding Earthquakes
Volcano Vocab
Understanding Volcanoes
The Ring of Fire
100
A point on Earth's surface right above the focus of an earthquake is called this.
What is the epicenter?
100

One scale is used to rank earthquakes, which measures the amplitude of seismic waves.  Each whole number increase on this scale represents 10 times greater seismic waves.

What is the Richter scale?

100

Viscous, "liquid", rock located on the surface of Earth is called this.

What is lava?

100

A volcano that is currently erupting, or recently erupted, is called this.

What is an active volcano?
100

The Ring of Fire lines this ocean.

What is the Pacific Ocean?

200
A region on Earth's surface that is broken, and where movement occurs, is called this.
What is a fault?
200

To determine the epicenter of an earthquake, scientists must measure the difference in travel time between P and S waves recorded from seismographs taken from at least this number of seismic stations.

What is three?

200
The bowl shaped depression formed by the collapse of a volcano after it has erupted is called this.
What is a caldera?
200
A flat, wide volcano that is made of lava with low silica content, and low dissolved gas, is called this.
What is a shield volcano?
200

The Ring of Fire is made up of many of these two geological features?

What are earthquakes and volcanoes?

300
The point below Earth's surface where a rock breaks or slips and causes an earthquake.
What is the focus?
300

This is the most common cause of tsunamis.

What is a earthquake (under the ocean floor)?

300
Viscous, "liquid", rock that is located beneath the surface of the Earth is called this.
What is magma?
300

A volcano that is tall and cone-shaped, with high-silica magma, and high or low levels of gas.

What is a composite volcano?

300

The majority of the Ring of Fire is located on this type of plate boundary.

What is a convergent boundary?

400

These are the names of the two types of seismic waves produced by an earthquake.

What are P waves and S waves?

400

The stick-slip motion that produces earthquakes can happen at this type (or these types) of tectonic plate boundaries.

What is convergent, divergent and transform fault?

400
A location where magma collects inside Earth is called this.
What is magma chamber?
400

A volcano is not currently active, but may become active again in the future is called this.

What is a dormant volcano?

400
When one plate slides underneath another plate, it is called this.
What is subduction?
500

Seismologists use the difference in arrival time between P and S waves to calculate the distance between these two things.

What is a seismic station and the epicenter of an earthquake?

500

On the Richter scale, an earthquake of magnitude 7.3 is this many times greater than an earthquake of magnitude 5.3.

What is 100?

500
The uppermost part of the conduit, where magma is release from Earth's interior, is called this.
What is a vent?
500

These are the three things that help rock in Earth's interior to melt.

What are high temperature, water, and low pressure?

500

More earthquakes and volcanoes are found in this state than any other.

What is Alaska?