David science 12/13
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What is a rock?
Rocks are created by Earth's natural forces and made of minerals
How are minerals classified?
Color, luster, and texture
How are rocks classified?
Sedimentary, Igneous, Metamorphic
How are sedimentary rocks formed?
When rock sediments are deposited in layers and harden
How are igneous rocks formed?
When molten rock cools
How are metamorphic rocks formed?
When rocks deep underground are heated and squeezed
What is weathering?
The wearing down of rocks, forming sediment
What is erosion?
When sediment moves to another place
Describe landslide, tornado, volcano?
- Landslide-gravity pulls earth down
- Tornado-A funnel of wind that moves earth
- Volcano-melted rock erupting from underground
Identify 3 tests to help classify a mineral
- Streak test
- Hardness test
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