Earthquakes!

Earthquakes are caused by...

• tsunamis crashing into the shore.
• lava flowing down a mountainside. towards the surface.
• gravitational pull of the moon.
• the movement and collision of plates.

People are most often inured or hurt during earthquakes from...

• fires.
• tsunamis.
• being knocked over.
• falling debris.

Which waves arrive first and are the fastest?

• surface waves
• s waves
• p waves
• seismic waves

This layer of the earth consists of the crust and the rigid upper part of the mantle.

• asthenosphere
• atmosphere
• lithosphere
• magmasphere

The inner core is the hottest layer and made of ...

• liquid iron
• taffy like rock
• solid iron and nickel
• liquid nickel

This layer of the earth is 83% of the Earth's interior.

• crust
• inner core
• mantle
• outer core

The crust is...

• cool, thin and the least dense.
• made of rock.
• part of the tectonic plates.
• all of the above

Magma pushes up under the crust causing earthquakes and volcanic eruptions. This is caused by...

• conduction.
• surface waves.
• convection.
• subduction.

Mountains form when...

• plates pull apart.
• oceanic plates slide under continental plates.
• continental plates collide.
• two plates slide past each other.

This tool is used to record an earthquake's s-waves and p-waves.

• seismogram
• seismograph
• anomometer
• mercalli stick