click below
click below
Normal Size Small Size show me how
rocks and mins
Review for 6th grade rocks and minerals test
| Question | Answer |
|---|---|
| A naturally occurring, inorganic solid with a definite chemical composition and crystal structure | mineral |
| the powdered form of a mineral left when striking on a porcelain tile | streak |
| the amount of light reflected by a mineral | luster |
| You perform a scratch test to check this property of minerals | hardness |
| orthorombic, monoclinic are examples of this property of minerals | crystal form |
| This happens when a mineral breaks in flat sheets | cleavage |
| This happens when a mineral breaks in chunks with jagged edges | fracture |
| This chart tells us 10 common minerals and how strong they are in relation to each other | Moh's Scale of Hardness |
| A combination of 2 or more minerals | a rock |
| formed by pressure of layers piling up over a long period of time | Sedimentary rock |
| Types include organic, detrital and chemical | sedimentary rocks |
| Type of sedimentary rock formed from the remains of living things | organic |
| Type of sedimentary rock formed from the layering of sediments on top of each other | detrital |
| Type of sedimentary rock that forms when minerals are dissolved in water...the water evaporates and leaves behind mineral | chemical |
| This type of rock is formed through compaction and cementation | sedimentary |
| Small pieces of rock and other material that help form sedimentary rock | sediments |
| The breaking up of rocks into smaller pieces/sediments | weathering |
| The carrying away of small pieces of rock after it has been broken up | erosion |
| Melted rock below the earth's surface | magma |
| melted rock that comes above the surface of the earth | lava |
| rock that forms as a result of cooled magma or lava | igneous rock |
| rock that forms inside the earth's surface | intrusive igneous rock |
| rock that forms on the surface of the earth | extrusive igneous rock |
| Rock that forms as a result of heat and pressure deep in the earth | metamorphic rock |
| examples of this type of rock include granite, pumice and obsidian | igneous rocks |
| examples of this type of rock include gneiss and marble | metamorphic rock |
| This diagram shows us that a rock can change over time and become a different type of rock | rock cycle diagram |
| This extrusive igneous rock is rough and has holes all over. It is formed from a violent eruption. It is also the only rock that can float. | pumice |
| This shiny extrusive rock cools quickly and was prized in ancient times for its trading value | obsidian |
| A metamorphic rock that has layers | foliated |
| A metamorphic rock that does not have layers | non-foliated |