Earth science weathering and erosion

Game Similar to Types of Weathering Game mentioned above, except the teacher reads headlines from recent newspapers, such as "Landslide destroys village in South America," or " feared dead in Russian avalanche.

This program traces the development of plate tectonics, beginning with the contributions and methods of geologist Alfred Wegener.

The freeze-thaw cycle happens over and over again and the break finally happens. Disintegration involves the breakdown of rock into its constituent minerals or particles with no decay of any rock-forming minerals.

The program covers convergent boundaries, subduction, hotspots, and the debate over what drives plate motion. The texture of the rock will affect the type of weathering that is most likely to occur. The ice crystal growth weakens the rocks which, in time, break up.

Because the outer surface of a rock is often warmer or colder than the more protected inner portions, some rocks may weather by exfoliation — the peeling away of outer layers. Discuss when you return. Because many individual plant and animal species existed during known time periods e.

Weathering and Erosion

C By the end of grade 2. By the end of grade 5. In glacial areas, huge moving ice masses embedded with soil and rock fragments grind down rocks in their path and carry away large volumes of material. One of the most well-known solution weathering processes is carbonationthe process in which atmospheric carbon dioxide leads to solution weathering.

The salts which have proved most effective in disintegrating rocks are sodium sulfatemagnesium sulfateand calcium chloride. Some of these salts can expand up to three times or even more. This process can be seen in Dartmoor where it results in the formation of tors.

B and erosion, have destroyed or altered most of the very early rock record on Earth, some other objects in the solar system, such as asteroids and meteorites, have changed little over billions of years.

When it rains and water flows everywhere, it usually has ions and salts dissolved inside. In pressure release, also known as unloading, overlying materials not necessarily rocks are removed by erosion, or other processeswhich causes underlying rocks to expand and fracture parallel to the surface.

This program looks at the research submersibles and indirect methods used to study the bottom of the sea, providing a glimpse of volcanic activity, formations such as the continental shelf and mid-ocean ridges, and life forms that thrive at extreme depths.

Weathering PowerPoint Fun to hook up to your big screen T. Aspects of flooding are also discussed. Provide students with a worksheet to record their observations. This is an important reaction in controlling the amount of CO2 in the atmosphere and can affect climate.

Analyses of rock strata and the fossil record provide only relative dates, not an absolute scale. Several factors control the type of weathering and the rate at which rock weathers.

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Aluminosilicates when subjected to the hydrolysis reaction produce a secondary mineral rather than simply releasing cations. For example, cracks exploited by physical weathering will increase the surface area exposed to chemical action, thus amplifying the rate of disintegration.

Chemical weathering Comparison of unweathered left and weathered right limestone.

Mechanical Weathering

When you see rocks next to each other that are different colors often shades of red then you know chemical reactions have taken place. As some minerals expand more than others, temperature changes set up differential stresses that eventually cause the rock to crack apart.

Chemical weathering Look up weathering in Wiktionary, the free dictionary.Weathering: Weathering, disintegration or alteration of rock in its natural or original position at or near the Earth’s surface through physical, chemical, and biological processes induced or modified by wind, water, and climate.

During the weathering process the translocation of disintegrated or altered. This series shows the physical processes and human activities that shape our planet. From earthquakes and volcanoes to the creation of sea-floor crusts and shifting river courses, Earth Revealed offers stunning visuals that explain plate tectonics and other geologic concepts and principles.

Follow geologists in the field as they explore the primal forces of the Earth. Watch BBC video clips full of interesting facts about erosion, one of the processes that shapes the Earth's surface and sometimes creates beautiful.

Teaching Weathering, Erosion, Deposition and Soil by Marcia J. Krech is available PDF pages of ready-to-run materials covering: Weathering, Erosion, and Deposition as well as Soil Composition and Formation.

Weathering and erosion slowly chisel, polish, and buff Earth's rock into ever evolving works of art—and then wash the remains into the sea. back to top Index:Minerals & Rocks, Weather, Earth In Space (local astronomy), Climate & Insolation, Astronomy, Rivers, Glaciers, Wind & Deserts, Coastal Processes.

Earth science weathering and erosion
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