| A | B |
|---|
| cause of an earthquake | movement of the Earth along a fault line |
| one warning to predict an earthquake | strange animal behavior |
| one warning to predict an earthquake | change in speed of s and p waves |
| one warning to predict an earthquake | change in the tilt of the land |
| one warning to predict an earthquake | change in water level in wells |
| epicenter | point on Earth's surface directly above the focus of an earthquake |
| focus | underground point of origin of an earthquake, where the rocks move and break |
| Describe the 1812 New Madrid Earthquake | occurred near Mississippi River; few deaths; course of Mississippi changed |
| Describe the1886 Charleston, South Carolina Earthquake | This was a strong earthquake. Church bells in Ohio rang. Much damage to Charleston, felt in Chicago |
| Describe 1989 Loma Prieta (Candlestick Park) Earthquake | It was a strong quake. Buildings cracked and fell. Bay Bridge damaged. Highways collapsed. |
| Describe the 1906 San Francisco Earthquake | It was a strong quake. San Andreas Fault moved about 25 feet. 3 day fire killed people. Town was almost destroyed. |
| Describe the 1964 Alaska Earthquake | largest U.S. quake; caused tsunamis; bears came out of hibernation early |
| Richter Scale | scale used to measure the strength of earthquakes with scale 1-10 |
| Mercalli Scale | scale based mostly on eyewitness accounts and measures the intensity and amount of damage done with scale 1-12 |
| seismograph | instrument that detects and measures seismic waves |
| How does a seismograph work? | A pen attached to a weight moves and records seismic movement on a drum under the pen |
| What are 3 types of seismic waves | p or primary wave; s or secondary wave; l or surface wave |
| What type of matter does each kind of seismic wave travel through? | p waves through solids, liquids, gases; s waves through solids; l waves on surface of land |
| speed of each type of seismic wave | p waves are the fastest; s waves are next; and l waves are slowest |
| Damage done by each kind of wave | p waves stretch rocks; s waves ripple rocks; l waves twist and bend the surface |
| How does each wave travel or what does it look like | p waves are push-pull waves; s waves travel up and down or side to side; l waves travel like ocean waves |
| where seismic activity is in Ohio | occurs mostly in northeastern Ohio in the Cleveland area and "mid western" around Anna |
| Tell about the earthquakes in Anna Ohio | The largest happened in 1937. Chimneys fell and walls cracked. |
