Earthquake Interactive Video Quiz

What is an earthquake?

• A sudden movement of the Earth's crust

• A tidal wave

• A type of weather phenomenon

Answer explanation

An earthquake is defined as a sudden movement of the Earth's crust, caused by the release of energy in the Earth's lithosphere. This distinguishes it from tidal waves and weather phenomena, making the first option the correct answer.

What are the four major layers of the earth?

• a. Crust, mantle, core, and surface

• b. Inner core, outer core, mantle, and crust

• c. Tectonic plates, ocean, land, and sky

Answer explanation

The four major layers of the Earth are the inner core, outer core, mantle, and crust. Option b correctly identifies these layers, while the other options include incorrect or unrelated terms.

What are tectonic plates?

• Small rocks found on the surface

• Layers of the atmosphere

• Different pieces of rock that make up the Earth's crust

Answer explanation

Tectonic plates are large, rigid pieces of the Earth's crust that move and interact with each other. They are not small rocks or layers of the atmosphere, making the correct choice 'different pieces of rock that make up the Earth's crust'.

What causes an earthquake?

• Movement of tectonic plates

• Changes in the weather

• Human activities

Answer explanation

Earthquakes are primarily caused by the movement of tectonic plates. These plates shift and interact at their boundaries, leading to the release of energy that results in seismic activity.

Where do nearly 90% of all earthquakes begin?

• The Atlantic Ocean

• The Pacific Ocean

• The Arctic Circle

Answer explanation

Nearly 90% of all earthquakes occur along the Pacific Ocean, particularly in the region known as the Ring of Fire, where tectonic plates meet and create significant seismic activity.

What device do scientists use to measure earthquakes?

• Volcanometer

• Seismograph

• Altimeter

Answer explanation

Scientists use a seismograph to measure earthquakes, as it detects and records the vibrations caused by seismic waves. A volcanometer measures volcanic activity, and an altimeter measures altitude, making them unsuitable for this purpose.

What is the epicenter of an earthquake?

• The point where the earthquake starts

• The location on the Earth's surface directly above the focus

• The strongest point of the earthquake

What magnitude is considered a major earthquake?

• 10.0

• 8.0

• 5.5

Answer explanation

A major earthquake is defined as one with a magnitude of 7.0 or higher. Therefore, 8.0 is considered a major earthquake, while 5.5 is not significant enough to be classified as such.

What can earthquakes cause besides shaking?

• Windstorms

• Tsunamis

• Rain

Answer explanation

Besides shaking, earthquakes can cause tsunamis, which are large ocean waves triggered by underwater disturbances like seismic activity. Windstorms and rain are not direct consequences of earthquakes.

Who studies earthquakes?

• Seismologist

• Geologist

• Meteorologist

Answer explanation

A seismologist is a scientist who studies earthquakes and seismic waves. They analyze data from seismic activity to understand the causes and effects of earthquakes, making them the correct choice for this question.