Chapter 1
What is a Jolt?
a sudden rough shaking.
What does underground mean?
Below the surface of Earth.
What does magnitude mean?
Axis
an imaginary line around which Earth rotates.
There were landslides off steep hills, deep cracks in the ground. The Mississippi River Rose up in huge waves and usually rivers flow downstream. But these earthquakes made the water move the other way, flowing upstream.
Where do Shock Waves begin?
underground
Seismograph was also used where?
Ancient China
Magnitude
amount or size
The two biggest American earthquakes happened in?
Alaska
Tsunami
It becomes a huge wall of water.
plates
very large sheets of rock that form part of Earth's surface.
What does the star mean/show on the Map?
What does the circles show/mean?
The star shows the center of the quake.
The circles mean the areas it affected.
What does Tsunami mean?
How do scientist study earthquakes?
They use a machine called a seismograph.
Tsunami
a huge ocean wave that hits shore.
Where do earthquakes most often happen?
near fault lines. Which are deep cracks in the ground.
How tall can a Tsunami be?
Some earthquakes are too minor to be felt. What does minor mean?
Lesser in importance.
Glaciers