Rocks

What are the origins of igneous rocks? 2. How is the composition and texture of igneous rock determined? Begin as magma Formed when magma cools and solidifies Volcanoes Extrusive – formed from lava that erupts onto Earth’s surface Intrusive – formed when magma hardens beneath the Earth’s surface Depends on how fast or slow the magma cools. Fine-grained igneous forms by fast cooling lava EX. Basalt, obsidian, rhyolite Coarse-grained igneous forms by slow cooling magma EX. Granite, gabbro

What are the origins of sedimentary rocks? Examples of sedimentary rock. Weathering and Erosion (sediments) Deposition (sediments deposited) Compaction (sediments compressed) Cementation (sediments glued together) Sandstone Shale Conglomerate Siltstone

What are the origins of metamorphic rock? Examples of metamorphic rock What is the rock cycle? HEAT and PRESSURE Can be formed from all 3 types of rocks Slate Phyllite Schist Gneiss Marble A series of processes that change one type of rock into another type of rock.

Rock Cycle Cut out The Rock Cycle diagram and stages on the handout. Color code The Rock Cycle by coloring the arrows according to the following chart: Follow the arrows to determine where to glue each stage. Glue completed Rock Cycle into your Science Notebook. Summarize the picture in a minimum of 3 sentences. Melting – RED Deposition – BLUE Erosion – GREEN Heat and Pressure - YELLOW Volcanic Activity – ORANGE