| A | B |
|---|
| sphere | a ball or globe |
| hydrosphere | the part of the earth's surface covered by water |
| lithosphere | the solid part of the earth |
| atmosphere | the air around the earth |
| crust | the thin outside layer of the earth |
| mantle | the thick layer of the earth just under the crust |
| core | the center part of the earth |
| mineral | a material found in the crust of the earth |
| quartz | a mineral made of silicon dioxide |
| physical properties | facts about an object that help identify it |
| identify | tell what something is |
| luster | the amount of shininess of a mineral or object |
| streak | the powder a mineral leaves when it is rubbed |
| density | the weight of an object compared to its volume |
| cleavage | the splitting of a mineral along a flat surface |
| fracture | the way a mineral breaks along uneven surfaces |
| crystal | a piece of a mineral with a definite shape |
| magnetite | a mineral that is attracted to a magnet |
| ore | a mineral that has a large amount of metal in it |
| classification | grouping things together that are alike in some way |
| igneous rocks | rocks formed from the cooling of hot, melted materials |
| sedimentary rocks | rocks formed by the cementing of materials together |
| metamorphic rocks | rocks formed when other rocks are put under great heat and pressure |
| molten | melted |
| magma | melted rocks and minerals inside the earth |
| lava | magma that comes through the earth's surface |
| texture | the size of the crystals in a rock |
| sediment | solid material that settles to the bottom of a lake or ocean |
| particle | a small piece of a solid material |
| limestone | a sedimentary rock made of calcite |
| coquina | sedimentary rock formed from sea shells that are cemented together |
| conglomerate | sedimentary rock made of pebbles and gravel |
| sandstone | sedimentary rock made of sand |
| shale | sedimentary rock made of mud and clay |
| metamorphic rocks | rocks formed by changes in other rocks |
| pressure | a pressing force |
| gneiss | a metamorphic rock with bands of minerals |
| schist | a metamorphic rock showing minerals flattened into bands or layers |
| slate | a metamorphic rock made from shale and that breaks in flat sheets |
