Ch 5-6, 17-18 Test Review
Rock Types Metamorphic-formed w/ heat & pressure (mica, slate) Sedimentary-layered dirt, compacted (limestone, sandstone) Igneous-cooled Magma (lava rocks-granite, basalt) Can change into the other (p. 139)
Characteristics Color-most common Streak-powder residue Texture (rough, smooth) Luster (how shiny) Density (how heavy) Hardness (Moh’s scale up to 10)
Ch 17 Pangaea-1 landmass broke apart thru Continental Drift (Alfred Wegener) Laurasia & Gondwanaland & Panthalassa (ocean) Evidence-fossils, plants, etc Sea Floor Spreading-magma rises & cools to form new land-continuous
Plate Tectonics Occur at plate boundaries Divergent-moves apart Convergent-collides Subduction-overlaps causes a deep trench Transform-slide side by side New land can form, earthquakes, tsunamis, etc as results
Volcanoes Shield Cinder-Cone Composite Magma (basaltic, andesitic, rhyolitic) Basaltic-forms intrusive rocks (inside) Rhyolitic- forms extrusive rocks (on surface)
Volcanoes Cont’d Ring of Fire-chain of volcanoes Hot Spots-active volcanoes not at plates Black Smokers-under H2O volcanoes Calderas-craters Pyroclastic flow-fast moving, dangerous