Regents LAB Review 3 9 minutes for each station 1) Properties of one mineral Classification of two rock samples 2) Epicenter Location 3) Elliptical Orbit

Mineral Properties LusterMetallicNon-metallicLuster Cleavage Flat planes Fracture UnevenCleavage Fracture StreakColoredWhite/NoneStreak HardnessScratch-hardNot-softHardness

The Main Physical Properties Used to Identify Minerals Luster how light reflects off a mineral metallicnon-metallic looks like a polished metal looks earthy, waxy, greasy, or brilliant

Cleavage The Main Physical Properties Used to Identify Minerals the mineral breaks in a predictable pattern because of its arrangement of atoms

The Main Physical Properties Used to Identify Minerals Streak the powder form of a mineral

Hardness The Main Physical Properties Used to Identify Minerals resistance to being scratched It is NOT the same as breaking! For example: You can break glass easily with steel. However, steel will not scratch glass.

ROCK Identification Igneous Rocks –Large, interlocking crystals –Vesicular – gas pockets (holes) –Glassy *Cooling rates affect texture

Igneous Granite – Interlocking Pumice - crystals vesicular

Igneous Obsidian - glassy

ROCK Identification Sedimentary Rocks –pieces/fragments of other rocks –Flat layers of particles –Fossils and shells –Ripple marks or mud cracks *Cemented/glued together

Sedimentary Pieces of rocks – Fossils glued together

Sedimentary Particles in flat layers:

Sedimentary Ripple marks

Sedimentary Mud cracks

ROCK Identification Metamorphic Rocks –Banding of crystals…. Foliation: “I see Stripes” –Twisting or folding…. distortion *Heat & Pressure

Metamorphic Gneiss – banding (“I see stripes”)

Metamorphic banding