| A | B |
|---|
| cleavage | process of breaking into distinct shapes |
| fossils | remains or traces of an organism that lived long ago that are preserved in the earth |
| fracture | no distinct shape |
| geologist | scientist who studies rocks & minerals to learn more about the history of our earth |
| hardness | resistance to scratching |
| igneous | rocks formed by cooling magma |
| magma | melted rock |
| magnetite | mineral used to help invent the compass |
| metallic | reflects light, polished |
| metamorphic | rock that has been changed into new rock |
| Mohs scale | what scientists use to classify the hardness of minerals |
| non-metallic | dull, waxy, pearly and brilliant luster |
| opaque | no light passes through |
| sedimentary | rocks formed by layers of loose material which solidified |
| translucent | varying degree of light |
| transparent | all light shines through |
