Rock Cycle Review Tuesday, November 3rd 2015 Textbook pages 217 – 219

Some Parts of the Earth’s Surface Build Up and Some Wear Down Internal geologic processes Generated by heat from the earth’s interior, generally build up the earth’s surface in the form of continental and oceanic crust including mountains and volcanoes External geologic processes Weathering : driven directly or indirectly by energy from the sun(mostly in the form of flowing water and wind) Physical, Chemical, and Biological Erosion: Wind, Flowing water, Human activities

Weathering: Biological, Chemical, and Physical Processes

Earth’s Rocks are Recycled…….. The three major types of rocks found in the earth’s crust — sedimentary, igneous, and metamorphic — are recycled very slowly by the process of erosion, melting, and metamorphism.

Earth’s crust is composed of minerals and rocks Three broad classes of rocks, based on formation Sedimentary Igneous Sandstone Granite Shale Lava rock Dolomite Metamorphic Slate Anthracite Lignite Slate Bituminous coal Marble Leave space under each rock type for in-class and homework notes!

The Earth’s Rocks Are Recycled Very Slowly Rock cycle: the interaction of physical and chemical processes that change rocks from one type to another. Slowest of the earth’s cyclic processes

The Life of a Rock Layers of sediment join together. Melted rock cools and hardens Changes are made from pressure and heat.

Rocks become smaller, and smaller, and smaller, and smaller. . . By erosion By wind By earthquake By floods By rain By slides By man Rocks change………….. By earthquakes By volcanoes By heat and pressure

Weathering: the breaking up of rocks and soil into different products (clay, sand, rock fragments like pebbles & stones) Erosion: the moving of weathered rock and soil. Weathering allows erosion to take place.

Sedimentary Rock is . . . Rock formed when layers of small particles of shell, rock, and sand join together. Types of Sedimentary Rocks Include… Conglomerate Sandstone Gypsum Shale Limestone

Sedimentary Rocks How They are Made Wind and water break down the earth Bits of earth settle in lakes and rivers Layers are formed and build up Pressure and time turn the layers to rock

Metamorphic Rock is . . . Types of Metamorphic Rocks Rock that is formed when pressure and heat create changes to sedimentary or igneous rock. Types of Metamorphic Rocks

Metamorphic Rocks What are They? Rocks that have changed They were once igneous or sedimentary Pressure and heat changed the rocks

Igneous Rock is . . . Rock that is formed when melted rock cools and hardens. Types of Igneous Rocks Granite

Igneous Rocks What are They? Fire Rocks Formed underground by trapped, cooled magma Formed above ground when volcanoes erupt and magma cools