| A | B |
|---|
| conglomerate | a type of rock formed from rounded pieces of other rock |
| crystal | a solid substance with a definite shape or pattern |
| dull | not able to reflect light; not bright or shiny |
| fossil | remains or traces of an organism that lived long ago that are preserved in the earth |
| gem | a precious stone that has been cut and polished (ruby, diamond) |
| igneous | a type of rock that forms when melted rock cools |
| lava | melted rock that erupts out of a volcano |
| luster | how the mineral reflects light |
| magma | melted rock that is underground |
| metamorphic | a type of rock that has been changed as a result of underground heat, pressure, and water |
| mineral | a solid substance found in nature with a crystal form |
| opaque | not able to let light pass through |
| property | something about an object that helps tell what it is |
| rock | material made up of minerals, clay, sand, and other materials |
| sediment | pieces of rocks, minerals and organic materials that are carried by water, wind or ice |
| rock cycle | the process by which rocks change to form new rocks |
| sedimentary | a type of rock formed from sediments that are carried by wind or water, dropped, and cemented or packed together |
| translucent | able to let some light pass through |
| transparent | clear; able to let light through |
| weather | to age and break down as a result of the effects of wind, rain and ice |
