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Mineral Properties
List the five main characteristics of a mineral. | A solid, naturally occurring, inorganic, crystalline structure, with a definite chemical composition. |
A mineral that DOES split apart evenly has the property of | cleavage |
A mineral that DOES NOT split apart evenly has the property of | fracture |
What is an element | pure minerals |
What does inorganic mean? | the mineral CANNOT come from materials that were once part of living things. |
What is a crystal? | particles in a mineral that line up in a pattern that repeats itself. |
What is Moh's Hardness Scale | a scale that rates minerals from 1 - 10 depending on the mineral's hardness. |
What is the HARDEST known mineral according to Moh's Hardness Scale? | diamond |
What is the SOFTEST known mineral according to Moh's Hardness Scale? | talc |
Explain how you test for a mineral's streak? | you observe streak by rubbing a mineral against a piece of unglazed tile called a streak plate |
streak | the color of a mineral's powder |
luster | how a mineral reflects light from its surface |
cleavage | when a mineral breaks/splits along flat surfaces |
fracture | when minerals break unevenly along rough or curved surfaces. |
What is a mineral's luster? | how a mineral reflects light from its surface. |
What are four terms to describe a minerals luster? | Earthy, waxy, pearly, glassy |
Name five uses of minerals? | ores, gemstones, food, drugs, and fertilizer. |
Why are minerals always solids? | it is always a solid because it has a definite volume and shape. |
Can a mineral scratch a material softer than itself? | yes, it can because a mineral can scratch minerals softer than itself. |
Shiny minerals, such as galena, are said to have what? | metallic luster |
What is mining? | when minerals are taken from the ground. |
What is an ore? | a rock that contains a metal or economically useful mineral |
Why are ore's so important to our society? | to make products, cars and machines. |
What is a gemstone? | a rare, colorful mineral with a brilliant luster. |
Hardness | a mineral's resistance to being scratched. |
Explain how to test for a mineral's hardness. | Use Moh's Hardness Scale. Use the numbers from 1-10 starting with the softest metal. |