| A | B |
|---|
| crust | Earth's most outer layer |
| mantle | Earth's inner part |
| core | Earth's most inner part |
| outer core | liquid |
| inner core | solid |
| earthquakes | is the vibration or shaking caused by movements within Earth |
| fault | a fracturealong which rocks move is called a what |
| 1906 | earthquake in San Andreas killed 700 people |
| 8.25 | the Rictor Scale for the earthquake in San Andreas |
| seismograph | measures and records the earthquake |
| what was the Rictor Scale in 1989 | 6.9-7.0 |
| volcano | is the opening in the Earth's crust through which lava and Earths material flow |
| shield | is a broad volcano with gently sloping sides |
| cinder | a volcano with steep sides |
| composite | is made from both lava flows and cinders |
