| A | B |
|---|
| geode | rounded, hollow rock that is lined with mineral crystals |
| crystallization | process by which atoms are arranged to form a material with crystalline structure |
| magma | molten material from inside Earth that hardens to form rock |
| lava | magma that reaches the surface |
| solution | mixture in which one substance is dissolved in another |
| vein | narrow channel or slab or a mineral that is different from the surrounding rock |
| size of crystal | depends on the rate at which magma cools |
| halite | formed when ancient seas evaporated |
