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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 |