| A | B |
|---|
| imprint | A fossil created by a print or impression |
| mold | A hollow fossil showing the outside feature of the organism |
| cast | fossil formed or shaped within a mold |
| amber | Hardened tree sap |
| glacier | A large mass of snow and ice that moves over land. |
| humus | Left over decomposed plant and animal matter. |
| topsoil | The top layer of soil, rich in humus and minerals |
| subsoil | A hard layer of clay and minerals below topsoil |
| pore space | The space between soil particles. |
| Permeability | The rate which water passes through a material |
| bay | A piece of land partially surround by water, smaller than a gulf. |
| Gulf | A piece of land partially surround by water, larger than a bay. |
| Island | A piece of land totally surrounded by water. |
| Fault | A break in Earth's layer caused by the movement or rocks. |
| Earthquake | Movements or vibrations in Earth. |
| Excavation | To dig out and remove fossils. |
| Fossil | Any evidence of an organism that lived in the past. |
