แผ่นดินไหวและภูเขาไฟระเบิด

The vibrations in the earth caused by the sudden release of energy is called an ______________.

• epicenter

• aftershock

• earthquake

• tsunami

In a volcano, magma collects in a packet called ________.

• Magma flow

• Magma chamber

• Magma pipe

• Hot spot

An opening on the Earth's crust through which hot molten rock flows out from deep inside the Earth.

• Volcano

• Fault line

• Fold

• Crater

The Ring of Fire, where many earthquakes occur, is located around the rim of which ocean?

• Atlantic

• Artic

• Indian

• Pacific

The point within the earth where the earthquake originates.

• Epicenter

• Fault

• Focus

• Strike-Slip

What instrument is used to measure seismic waves?

• Seismophone

• Seismogram

• Seismologist

• Seismograph

A volcano that had its last eruption more than 10,000 years ago.

• Extinct Volcano

• Sleeping Volcano

• Active Volcano

• Quiet Volcano

What is a dormant volcano?

• molten rock

• the center of a volcano

• will never erupt again

• a volcano that is sleeping, but could erupt agian

What is being measured by the amount of energy released during an earthquake?

• Focus

• Magnitude

• Intensity

• Epicenter

Which statement is NOT true of Intensity of an earthquake?

• Intensity is what humans see and feel.

• Intensity scale in number is written in Roman Numeral.

• Intensity is the amount of energy released by an earthquake.

• Intensity is determined by PHIVOLCS using the Earthquake Intensity Scale (PEIS)