1. Warm Up What does this symbol mean on a topographic map? ***Remember! Your vocabulary for chapter 3 is due tomorrow!***

2. Minerals: What are they??

3. Mineral Structure Mineral: Naturally formed, inorganic solid with a definite crystalline structure Most are made up of compounds of several different elements

4. Crystals Crystals are formed from repeating patterns of atoms that are present throughout the mineral.

5. Crystal Shapes

6. Two Groups of Minerals Silicates –Contain oxygen and silicon –Makes up more than 90% of Earth’s crust Non Silicates –Do not contain oxygen and silicon

7. Uses of Minerals Metallic Minerals – good conductors of heat and electricity. –airplanes, cars, computers, electronic equip. Nonmetallic Minerals – good insulators of electricity. –roads, buildings, bridges, other structures Gemstones – Rare and colorful. Used in jewelry.