| The tide stages are flood tide, high tide, ____ tide, and low tide. |
drumlin |
| The Earth's ____ is mostly solid rock between its crust and core. |
ebb |
| A ____ is an elongated whale-shaped hill formed by a glacier. |
full moon |
| An underwater earthquake could generate a ____. |
mantle |
| Clay, humus, sand, and ____ (quartz grains) are found in soil. |
ozone |
| The scientific study of earthquakes is called ____. |
seismology |
| A molecule of ____ contains three oxygen atoms. |
silt |
| The Earth is between the Sun and the Moon during a ____. |
tsunami |
