Brainpop Earthquakes

What's the main cause of most earthquakes?

• Pressure from within the earth's crust

• Hurricanes

• Human activity

• Changes in temperature within the earth's mantle

Which of the following is a true statement about tectonic plates?

• All the teutonic plates are located at earth's core.

• They're located approximately 10 meters below the surface of the ocean.

• They're located in the molten layer beneath Earth's crust

• All of Earth's landmass rests on tectonic plates

The weight of the lithosphere keeps the mantle in a semi-solid state. What can you infer/guess from this?

• Pressure and heat have similar effects on solids

• Pressure raises the melting point of solids

• Pressure lowers the melting point of solids

• Pressure has no effect on the melting point of solids

Place the following in sequence from highest to lowest temperature: A) Lithosphere; B) Mantle; C) Core

• C, A, B

• B, C, A

• C, B, A

• A, C, B

What can you infer/guess from the fact that tectonic plates are always moving around?

• New volcanoes form every few years.

• The shape and location of the continents have changed over time.

• Tectonic activity probably caused the last Ice Age.

• Earthquakes will continue long after hurricanes and tsunamis have stopped.

Why are surface waves more destructive to buildings than the initial seismic wave in an earthquake?

• It creates more sustained motion on the surface.

• It reaches the surface faster.

• It reaches deeper below the surface.

• It travels farther from the hypocenter.

What is this instrument called?

• Richter

• Barometer

• Electrograph

• Seismograph

Why are faults sometimes referred to as "active boundaries?"

• Because they are all volcanically active

• Because they serve as boundaries between nations

• Because Earth's crust shifts on either side of them

• Because people must actively avoid faults to escape injury

In the phrase, "The Richter scale measures the potency and duration of seismic events," what does "potency" mean?

ASpeed BStrength CType DTime

• Speed

• Strength

• Type

• Time

Which city is most likely to experience a strong earthquake?

• Los Angeles (at the Pacific Ocean on the west coast of America)

• Chicago (in the top-middle of America)

• New York (at the Atlantic Ocean on the east coast of America)

• Miami (at the south west of America on the Atlantic ocean)