Crystals. Found in minerals and have a regular geometric shape.

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Crystals. Geologists Found in minerals and have a regular geometric shape.
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Presentation transcript:

Crystals

Found in minerals and have a regular geometric shape.

Geologists

Scientist who study rocks and minerals to help us learn about the formation of the earth.

Granite

Rock composed of the minerals: Quartz, Mica, and Feldspar.

Hardness

How resistant a mineral is to being scratched.

Igneous rocks

Formed from minerals that have melted deep within the Earth.

Luster

The way a mineral reflects light.

Magnetic minerals

Minerals which show magnetic properties. Two examples are magnetite and hematite.

Metamorphic rocks

Formed from igneous, sedimentary, or other metamorphic rocks which contain minerals that have been changed by heat, pressure, or chemical action.

Mineral

Occur in nature and have definite chemical compositions and physical properties. They are the raw materials of rocks.

Mohs Scale

Used by geologists to classify a given minerals hardness.

Rock

Earth materials made up of different kinds of minerals.

Scratch test

Used to determine the hardness of a mineral.

Sedimentary rocks

Formed as particles settle to the bottom of oceans and lakes.

Streak color

When an unknown mineral is rubbed against a streak plate, (unglazed piece of porcelain) it may produce a colored line if it is softer than the streak plate.

Streak plate

Unglazed porcelain material that is used to determine the streak color of a mineral by rubbing a mineral over its surface.