Earth’s Interior and Plate Tectonics Earth’s Interior Weathering Physical and Plate and Erosion Evidence Weatheri Tectonics for Plate ngWhat isEarth’s Tectonics ChemicalInterior Weatheri like Transform ng Erosion Fault Boundaries Earthquake Plate Convergent Minerals Tectonics s and Plate and Rocks Boundaries Volcanoes Divergent How old Plate What are Structure are Rocks Boundaries Earthquake Volcanoes and s Origin of Rocks
The Rock Cycle Cementation Cementation Weathering Sedimentary Sediment Sediment Heat and/or pressure Weathering Weathering Heat and/or pressureCopyon a Metamorphic Igneousposter Melting Coolingboard Magma & Lava
Rocks and MineralsROCKS –All rocks are made of 2 or more minerals, but minerals are notmade of rocks.There are many common names for rocks and theusually give you an idea of how big the rock is.
Rocks and MineralsRock Words:1. mountain - huge, giant hunk of rock that is still attached to the earths crust, doesnt move, tall2. boulder - large, taller than a person3. rock - large, you could get your arms around it or a bit smaller but it is usually jagged, broken off a bigger piece of rock4. river rock - round rocks that are along the edge & at the bottom of fast-flowing rivers
Rocks and Minerals5. stone - medium, you could hold it in two hands6. pebble - small, you can hold it with two fingers, could get stuck in your shoe, usually rounded7. sand - made up of tiny pieces of rock, grains of sand8. grain - tiny, like a grain of rice or smaller, often found on a beach9. dust - really fine powder that is mixed in with sand or soil10. speck - as in a speck of dirt
Rocks and Minerals Rocks are composed of Minerals Rocks dolomite Mica Minerals are non-living substances with definite Calcite internal structure Olivine Quartz Coal Granite Pyroxine Clay Feldspar amphibole
Igneous Rock Igneous Rocks are molten rocks that cooled and solidified. Nearly all igneous rocks are made of crystals of various minerals.
Igneous Rock The faster the rock cools the less the crystals grow.
Igneous Rock Obsidian rocks are smooth stones used by early American Indians to make tools. Their composition is much like that of granite.
Igneous Rock Obsidian becomes smoother as they cool much more quickly. Because they cool more quickly, they have less or no crystals.
2 kinds of Igneous Rock Extrusive igneous rock cools on Earth’s surface.
2 kinds of Igneous Rock Intrusive igneous rock forms from magma that cools while trapped beneath Earth’s surface. They are insulated and cools off slowly
2 kinds of Igneous Rock Because of long cooling period, the crystals form. Crystals on intrusive igneous are larger than those on extrusive igneous.
Weathering Weathering is the process by which rocks are broken down as follows: Pieces of boulders fall down hillsides due to gravity, wind or rain. Rivers carry rocks down into deltas, lakes or the sea. Waves beating against cliffs.
Weathering Gravity, waves, rivers, wind, etc. break the pieces into pebbles, sand and even smaller pieces. As pieces of rock accumulate, they can form another type of rock: Sedimentary rock. Page 578: Read “Remains of Older rocks and organisms form sedimentary rocks. Explain the two ways loose sediment become a rock.