1. Record homework. Unpack (notebook, pencil). Title your next page “Geologic Natural Resources.” Update ToC. If you have a t-shirt order, please bring it to me now. Agenda: 1) Notes, notes, 2) and more notes.

2. Natural Resources: naturally produced materials that are useful to us because of their physical or chemical properties. physical property examples: texture, density, color, hardness… chemical property examples: ability to burn, how it reacts to acids… Some examples of natural resources?

3. Four Groups of Natural Resources Four Groups of Natural Resources ( that we will be studying) : Minerals: naturally occurring, inorganic solids with crystal structure and a specific chemical composition (more on this later) ; identified by the unique properties of each Rocks: naturally occurring solids that can be made of just about anything found in or on the crust grouped into igneous, sedimentary, or metamorphic based on the processes that form them further classified into subgroups based on texture or formation Ores: material mined for profit Fossil fuels: naturally occurring objects that come from the remains of once living things; give off energy when burned

4. Where do these natural resources come from? The “rock cycle” describes an on-going series of processes that produce the three main rock types, and in one way or another, all four types of geologic natural resources. The processes include: melting slow cooling rapid cooling extreme heat and pressure weathering/erosion deposition compaction cementation

5. Recap: What are the five requirements of an object for it to be considered a mineral? New page: Minerals

6. mineral crystal structure naturally occurring solid unique chemical composition inorganic

7. unique chemical composition = ingredients are always the same Sodium (Na) is a metal; explosive in water Chlorine (Cl) is a gas; poisonous Together = NaCl or table salt! Safe, inert, and necessary for our health

8. crystal structure organized, repeating atomic or molecular pattern

9. Physical properties of minerals are used to determine which mineral they are. 1.Color 2.Luster 3.Density 4.Hardness 5.streak 6.cleavage

10. Color – simple observation; not very useful Luster – description of the way it reflects light; metallic or non-metallic (non-metallic is further divided into glassy, silky, pearly, dull) non-metallicmetallic

11. Density – You know this already! d = m/V Hardness – comparison of the unknown mineral to objects with a known hardness; values are on Mohs’ Hardness Scale; test is to scratch the mineral with the objects or see if the objects scratch the mineral Streak – the color of the powder of a mineral

12. Cleavage or fracture: to cleave: break on parallel planes fracture: break in irregular, non- repeating shapes

13. Mineral crystals form from: cooling magma precipitation out of a solution

14. Study ALL of this new vocabulary! Tomorrow you will attempt to identify unknown minerals by doing several of the mineral tests we discussed today.