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EROSION

EROSION. JORGE MEDRANO. EROSION. WHAT IS EARTH EROSION ?.

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EROSION

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  1. EROSION JORGE MEDRANO

  2. EROSION

  3. WHAT IS EARTH EROSION ? • Erosion is a natural process which is usually made by rock and soil being loosened from the earth's surface at one location and moved to another. Erosion changes the landscape by wearing down mountains, filling in valleys, and making rivers appear and disappear. It is usually a slow and gradual process that occurs over thousands or millions of years.

  4. Igneous rock-obsidian

  5. Metamorphic rock

  6. What is igneous rock ? • Obsidian...even the name is exotic. Ever since I had my first rock collection as a child, I've loved obsidian. Sharp and shiny, obsidian is so different from other rocks. But until a few years ago when I made my first obsidian collecting trip to Glass Buttes, Oregon, I thought obsidian was pretty much just black glass. That amazing trip really opened my eyes. The ancient volcanic hills called Glass Buttes hold a dazzling variety of gem-quality obsidian, including: mahogany, red, flame, midnight lace, jet black, pumpkin, brown, rainbow, gold sheen, silver sheen, green, lizard skin, snowflake and more. My goal in this article is to increase your awareness of some of the more fascinating aspects of this incredible stone.

  7. What is metamorphic rock ? • Metamorphic rocks are sedimentary or igneous rocks that have been altered by heat and/or pressure. As they are derived from previously existing igneous, sedimentary or even metamorphic rock, their appearance is variable. They are identified by the types of minerals they contain and their texture.

  8. Sedimentary rock

  9. What is sedimentary? • Sedimentary rocks make up about three-quarters of the rocks at the Earth’s surface. They form at the surface in environments such as beaches, rivers, the ocean, and anywhere that sand, mud, and other types of sediment collect. Sedimentary rocks preserve a record of the environments that existed when they formed. By looking at sedimentary rocks of different ages, scientists can figure out how climate and environments have changed through Earth’s history.Fossils of ancient living things are preserved in sedimentary rocks too.

  10. Chemical

  11. What is chemical weathering? • The minerals in rocks formed beneath the surface are in equilibrium with the temperature and pressure conditions at time of their formation and thus are quite stable. However, many minerals are no longer in equilibrium with their environmental conditions when exposed at the surface and are susceptible to weathering. Chemical weathering results in the formation and retention of minerals in equilibrium with environmental conditions at the Earth's surface.

  12. PHYSICAL

  13. What is physical weathering? • Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water.

  14. Rock races

  15. The fastest one was the gravel. It went the fastest downstream. The second fastest was going to be sand. Third, was clay soil. Then the slowest to deposit was potting soil.

  16. Is inclined to erode?

  17. Results What is the variable in this experiment? • We change the height of the slope it is the variable. • What is the relationship between the slope of a streambed and the amount of erosion that occurs? The steeper the slope the faster it will erode.

  18. Volcano part.1

  19. Volcano part.2 • A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time. • Volcanoes are generally found where tectonic plates are diverging or converging. A mid-oceanic ridge, for example the Mid-Atlantic Ridge, has examples of volcanoes caused by "divergent tectonic plates" pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by "convergent tectonic plates" coming together. By contrast, volcanoes are usually not created where two tectonic plates slide past one another. Volcanoes can also form where there is stretching and thinning of the Earth's crust (called "non-hotspot intraplate volcanism"), such as in the African Rift Valley, the Wells Gray-Clearwater volcanic field and the Rio Grande Rift in North America and the European Rhine Graben with its Eifel volcanoes. • Volcanoes can be caused by "mantle plumes". These so-called "hotspots" , for example at Hawaii, can occur far from plate boundaries. Hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.

  20. Volcano • I wouldn’t like to live by a volcano because it could erupt any minute or years and we could die and + its extremely hot.

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