What is the Earth's surface called?
The mantle
The crust
What is the crust made of?
One big solid piece
Broken pieces called plates
Can we feel the Earth's plates moving?
Yes, all the time
No
How do the plates move?
They jump up and down quickly
They slide and pull away slowly
What can happen when plates move?
Chunks of rock can explode and cause shock waves
The plates turn into lava
Where do shock waves begin?
On the Earth's surface
Deep underground at the focus
What do shock waves cause when they reach the surface?
An earthquake
A thunderstorm
What is the earthquake’s epicenter?
The place on Earth’s surface right above the focus
The bottom of the ocean
Where do people feel the earthquake the most?
Far away from the epicenter
At the epicenter
What can happen if an earthquake happens underwater?
It makes it snow
It can cause a tsunami
What is a tsunami?
A giant ocean wave
A small rain shower
How tall can some tsunamis be when they hit shore?
As tall as a ten-story building
As tall as a tree
How do tsunami waves start out at sea?
Huge
Small
What happens to tsunami waves near land?
They suck up water and grow taller and wider
They get smaller and disappear
What can some earthquakes do to buildings?
Make buildings fall down
Make buildings float
What machine tells us how strong an earthquake is?
A seismograph
A thermometer
