Jacks crossword

12345678
Across
  1. 3. what does the modified mercalli intensity scale measure
  2. 5. what boundary is it when two tectonic plates pull apart.
  3. 7. what is the center part of an earthquake
  4. 8. secondary waves are bigger than primary
Down
  1. 1. what type of boundary is it when two tectonic plates push together
  2. 2. an earthquakes strength
  3. 4. what type of stuff does a Richter magnitude scale measure
  4. 6. seismic surface waves do more damage than p,s waves