| A | B |
|---|
| Earthquake | movement of the crustal plates |
| Seismic waves | waves caused by earthquakes |
| siesmograph | machine that measures earthquakes |
| P waves | secondary waves go through liquids and solids rocks move in same direction |
| S waves | Secondary waves, rocks move at right angle, waves only go through solids. |
| Atmosphere | a blanket of air that protects the Earth from Ultra violent rays contains O2 we breathe |
| Lithosphere | solid part of the earth- land |
| Hydrosphere | all the water |
| Focas | actual point of an earthquake |
| Geoligist | person who studies the structure, history and composition of the earth |
