Rocks
Terms
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- Igneous rocks
- Rock formed when magma or lava cools and hardens
- metamorphic rocks
- formed from preexisting rock subjected to heat and pressure (rock is solid, but minerals break down, form, change shape)
- sedimentary rocks
- Rocks formed from the weathering, erosion, deposition, and compaction of other rocks
- Erosion
- The process by which wind, water, ice, or gravity transports soil and sediment from one location to another
- Deposition
- the process of dropping, or depositing, sediment in a new location
- Compaction
- The process by which sediments are pressed together under their own weight.
- Cleavage
- physical property of some minerals that causes them to break along smooth, flat surfaces
- olivine
- green, naturally occurring mineral
- augite
- small, black naturally occurring mineral
- tourmaline
- rectangular, black naturally occurring minerals
- quartz
- clear naturally occurring minerals
- plagioclase
- pink naturally occurring minerals
- orthoclase
- white naturally occurring minerals
- Streak
- color of the powder in a mineral
- mineral
- Naturally occurring solid that has a crystal structure