Day 5 How do igneous rocks form Igneous

Day 5 How do igneous rocks form? Igneous rocks form when molten rock (magma or lava) cools and hardens. How do metamorphic rocks form? Metamorphic rocks form when an existing rock changes due to heat and/or pressure. Daily Warm-Up Exercises 1

Igneous and Metamorphic Rocks (Part 1, steps 1 -6) Investigation 8 One Rock to Another 2

Rock Identification A and B Using the hand lens and the acid, complete the Rock number and Description columns. When you finish with your group of rocks, switch rock containers. 3

Rock Identification A (#11 - 13) 11 igneous granite 12 13 • pink, white, black, grey • shiny flat crystals • dense • grey, black, white • dense basalt, fine-grained • fine-grained igneous basalt, vesicular • black, grey • holes of various sizes • dense intrusive extrusive 4

Rock Identification A (#16 - 19) 16 igneous obsidan 17 igneous pumice 19 igneous scoria • black, dark brown • very shiny, like glass • forms sharp edges extrusive • grey, tan with holes • not very dense • would float in water extrusive • browns, reds • holes like pumice • does not float in water extrusive 5

Rock Identification A (#21) 21 igneous tuff • mostly white, some tan • chalky, grainy extrusive 6

Rock Identification B (#1 - 15) 1 metamorphic • black, shiny comes from shale or mudstone • white, tan, black with lines comes from shale or granite • fizzes in acid • white, crystalline comes from limestone schist 14 metamorphic gneiss 15 metamorphic marble 7

Rock Identification B (#18 - 20) 18 metamorphic • pink, crystalline comes from sandstone • black, hard, smooth comes from shale quartzite 20 metamorphic slate 8

Relative Scale and Magnification Exercise 8. 3 9

Are these objects the same size in real life? 10

What Size Is This? 11