| A | B |
|---|
| Shape of the earth | oblate spheroid |
| What causes the earth to bulge | caused by the spinning of the earth |
| Define Atmosphere | a blanket of gasses surrounding the earth |
| Define Hydrosphere | all earth's water |
| Define Lithosphere | thin outer of the earth consisting of the crust & the rigid upper mantle |
| Name the three major zones of the earth | crust mantle core |
| Define crust | thin, solid outermost covering of the earth |
| Define mantle | a zone of rock nearly 2,870 km thick below the crust |
| Name two types of seismic waves | Primary or P waves and Secondary or S waves |
