Across
- 3. When two tectonic plates move toward each other
- 5. Volcano
- 7. When two tectonic plates move away from each other
- 8. an instrument that measures earthquakes
Down
- 1. the point on the earth's surface above the focus
- 2. the innermost of the earth
- 4. A type of lava that is smooth, billowy, or ropy
- 6. the outermost shell of the earth