Presentation on theme: "The Rock Cycle By: Mr. Meringolo Before We Begin… Write down the following questions and answer throughout the presentation What is Sediment? What are."— Presentation transcript:
The Rock Cycle By: Mr. Meringolo
Before We Begin… Write down the following questions and answer throughout the presentation What is Sediment? What are the three different types of rocks? How are each of these three rocks formed? Give an example of igneous and sedimentary rock. How does Igneous rock change to Sedimentary rock? How does Sedimentary Rock change into Metamorphic Rock?
Sediment Sediment can either be: Material, originally suspended in a liquid, that settles at the bottom of the liquid when it is left standing for a long time Material eroded from preexisting rocks that is transported by water, wind, or ice and deposited elsewhere
Igneous Rock Igneous rock is formed when magma or lava cools and hardens to become solid. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool. Igneous rock can form below the ground where the magma cools slowly or igneous rock can form above ground, where the magma cools quickly.
Igneous Rock Intrusive igneous rock- Rock that forms when magna cools beneath Earth’s surface. Extrusive igneous rock- Rock that forms when lava cools on Earth’s surface. An example of Igneous Rock is Granite, which is igneous rock that has cooled slowly and minerals have crystallized and grown.
Sedimentary Rock Sedimentary rocks are made up of minerals formed from solutions or sediments from older rock. Sedimentary rock forms due to the pressure weighing down on the layers of minerals or sediment or when minerals dissolved in water solidify between sediment pieces and cement them together. Two examples of Sedimentary rocks are sandstone and limestone
Metamorphic Rock Metamorphic Rock is formed when rocky material experiences intense heat and pressure in the crust of the earth. Through the metamorphic process, both igneous rocks and sedimentary rocks can change into metamorphic rocks, and a metamorphic rock can change into another type of metamorphic rock as well. Heat and pressure do not change the chemical makeup of the rocks but they do change the mineral structure and physical properties of those rocks.
The Rock Cycle The Rock Cycle is a group of changes in which: Igneous rock can change into sedimentary rock or into metamorphic rock Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock.
Melting Melting is the result of continued heating Leads to production of magma and new igneous rocks which are formed when the the magma cools.
Heat and Pressure Metamorphic rocks trapped underground are still subject to enormous heat from rising magma, or heated water, and pressure. Sometimes the heat can get so intense the rocks actually melt. Pressure comes from the incredible weight of material surrounding the rock on all sides. The pressure pushes new minerals into the rock and drives other minerals out; the result, is that the rock is chemically changed.
Weathering The process in which rocks are broken down into smaller particles. Two types of weathering: Physical weathering: physical action which breaks up rocks. Chemical Weathering: when the rock is attacked by chemicals. An example of this is how acid rain breaks down limestone.
Erosion Erosion is the wearing away of exposed surfaces of rock by agents such as wind, moving water and ice.
How do tectonic plate motion affect the rock cycle? Rocks can be changed into Metamorphic rock by the collision of tectonic plates due to increased temperature and pressure. Uplift- The rising of regions of the crust to higher elevations where the rate of erosion on rock increases Subsidence- The sinking of regions of the crust to lower elevations which leads to the formation of basins where sediment can be deposited.