| Question |
 |
|
| Answer |
|
|
| Def. Peridotite |
Rock carried up to surface by lava |
| Earths Average density? |
5.5 t/m3 |
| Crusts average density? |
2.7 t/m3 |
| Def Focus |
Point where breaking rocks occur on the fault |
| Def. Epicenter |
Point on surface directly above focus |
| P-Wave? |
Subsurface primary wave |
| S-Wave? |
Subsurface secondary wave |
| Shock wave velocity? |
increases with rigidity, decreases with density |
| What happens to shockwaves at boundaries within the earth? |
they get refracted |
| The asthenosphere? |
'low velocity zone' 100 - 300kms deep |
Poultry
