Bell Work 9/13/2017 Get your comp book and add page 11 “What is a mineral?” to your table of contents.

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Presentation transcript:

Bell Work 9/13/2017 Get your comp book and add page 11 “What is a mineral?” to your table of contents.

Today’s Goals: Know how to tell if something is a mineral or not Explain how color and luster are used to identify minerals

What is a mineral? CARD SORT

What is a mineral? Plates=silica and feldspar Toaster=copper, iron, nickel, mica, chromium Radio=aluminum, copper, gold, iron

What is a mineral? To be a mineral, it must have all five of the criteria below. They are NOT made by humans. They have NEVER been alive and are NOT made up from plants or animals. They are SOLIDS. Each one is made of a particular mix of chemical elements. Minerals “grow” as CRYSTALS because the elements that make them up are arranged in a certain way.

What do you think… Object #1: Wood No

What do you think… Object #2: Quartz Yes

What do you think… Object #3: Plastic No

What do you think… Object #4: Graphite Yes

What do you think… Object #5: Copper Yes

What makes up a mineral?

Two Groups of Minerals: Silicate Minerals Nonsilicate Minerals silicon Made up of ________ and __________ Does not contain __________ or oxygen oxygen silicon Made up of Carbon, Fluorine, and _____________ 90 Make up ______% of Earth’s crust Sulfur Mica Ex: Quartz, ________, and Feldspar Ex: Native elements, ____________, Halides, Oxides, Sulfates, and Sulfides Carbonates

Examples of Minerals: Silicate Minerals

Examples of Minerals: Nonsilicate Minerals

Properties of Minerals How to identify minerals… Color Luster – the way a mineral reflects light (metallic or non-metallic) Hardness – the ability of a mineral to resist being scratched Streak – powder scraped off is the same color as the mineral Density Crystal shape – 6 basic crystal shapes Cleavage and fracture – how a mineral breaks Special properties – individual properties that individual minerals have (ex. Magnetite is naturally magnetic)

COLOR Most minerals occur in more than one color.

LUSTER Luster refers to how light is reflected from the surface of a mineral. Is it shiny? Does it look oily?

Luster: Yes or No? Yes

Luster: Yes or No? Yes

Luster: Yes or No? No

Luster: Yes or No? Yes (glassy luster)

Luster: Yes or No? Yes

Luster: Yes or No? No

Why is color not the best property to use to identify a mineral?

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