Science Topic 5, Lesson 1

Earth's surface is a thin layer of rock called

• crust

• mantle

• core

• atmosphere

The crust is the top part of large pieces of rock called ____________________

• hazards

• volcanoes

• tectonic plates

• earthquakes

A _______________ is a crack in the crust where two sides slide past each other

• mantle

• earthquake

• crust

• fault

A __________________ is a shift within Earth that causes the Earth to shake.

• earthquake

• tsunami

• volcano

• hurricane

A _____________ is a danger to humans resulting from an event

• tectonic

• fault

• crust

• hazard

Which earthquake would cause the most damage according to the Modified Mercalli Intensity Scale?

• M5.0

• M2.5

• M7.0

• M9.1

Which earthquake would most likely not be felt by a person according to the Modified Mercalli Intensity Scale?

• Earthquakes that are higher than M6.0

• Earthquakes that are lower than M3.0

• Earthquakes that are higher than M7.0

A massive wave that can cause damage when it reaches land.

• earthquake

• tide

• tsunami

• volcano

Are tsunamis always caused by earthquakes?

• Yes

• No

When an underwater earthquake produces a tsunami, what happens first?

• Waves reach the coast.

• Large waves move in all directions away from the source of the plates shifting underwater.

• Waves get slower and increase in height as they reach the coast.

• The movement of the seafloor causes the ocean to form large waves.