Rocks and Minerals
by Aaliyah Douglass
1. Geologists- Geologists are people who study the Earth
2. Properties- Properties are like methods. Geologists are a type of property.
2.1. Color- Color is like is it green, blue, or whatever color it is
2.2. Hardness- Can they scratch other things like a steel plate?
2.2.1. Mohs hardness Scale- The scale shows which mineral is harder then the other minerals. Like Diamond ranks the highest.
2.3. Crystalline Structure- A unique arrangement of atoms in a crystal.
2.4. Reaction with acid
2.4.1. Does it Fizz or not?
2.5. Transparency
2.5.1. If you can see through it or not
2.5.2. Opaque- Is hard to read but only a little blurry.
2.5.3. Transparent- Can see through it clearly.
2.5.4. Transluctent- Can't see through it.
2.6. Luster
2.6.1. Glassy-Dull-Brilliant
2.7. Light Refraction
2.7.1. Can you see a double image or a single image?
3. Rocks
3.1. Metamorphic
3.1.1. Is formed by high heat and or high pressure of the earth
3.1.1.1. Examples- Marble, Slate, and Phyllite.
3.2. Sedimentary
3.2.1. Is formed by tiny rock pieces cementing together
3.2.1.1. Examples- Coal and Fossils(fossils are found in sedimentary
3.3. Igneous
3.3.1. When Magma cools
3.3.1.1. Examples- Obsidian and Andesite