Quiz #11 on rocks
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Igneous rock uses
Hard, dense, and durable - Building materials and tools
Igneous rock formation
• Made of magma that cooled/hardened • Cools faster near surface • Smaller the grain & less crystals the faster it cooled
Metamorphic rock uses
Building/sculpting materials
Metamorphic formation
• Collisions between Earth’s plates - pressure • Magma rising up - heat
Metamorphic rock characteristics
Foliated - thin, flat layers
Sedimentary rock uses
Soft and easy to cut - Building materials
Sedimentary rock formation
• Made of sediments that were compacted • Big layers
Deposition
Sediment settles out of the wind/water carrying it
Erosion
Water/wind/ice loosen and carry rock fragments
Compaction
Sediments press together
3 characteristics to identify rocks
Color, texture, mineral composition
Why is color not enough to classify a rock?
Rocks share colors and often have different colors
Rocks are made of ________ and ________
Minerals and sediment
Minerals in rocks provide…
Color
Texture
No grain, fine grain, coarse grain, banded grain
No grain
Smooth rock
Fine grain
Tiny, tiny grains
Coarse grain
Rough rock
Banded grain
Layered
5 processes in the rock cycle
• Compaction and cementation • High temperature and pressure • Weathering and erosion • Melting • Cool/harden