Earthquakes Study Guide Review

1. Earthquakes are the shaking or sudden shocks of the surface of the Earth.

• True
• False

2. How many earthquakes happen in the world each year?

• more than 10,000
• more than 1,000,000
• more than 100,000

3. When do foreshocks happen?

• before an earthquake
• during an eathquake
• after an eathquake

4. When do mainshocks happen?

• before and earthquake
• during an earthquake
• after an earthquake

5. When do aftershocks happen?

• before an earthquake
• during an earthquake
• after an earthquake

6. How long do most earthquakes last?

• less than a minute
• 10 minutes
• 1 hour

7. Where the earthquake strikes at the surface is called the ________________.

• hypocenter
• epicenter

8. Earthquakes are formed in the crust along the edges of the plates called fault lines.

• True
• False

9. When energy forces the tectonic plates to slide, move over and collide against each other that is when an earthquake happens.

• True
• False

10. Where was the strongest earthquake ever recorded? It registered 9.6 on the Richter scale.

• Chile
• San Francisco
• Alaska