PPT-Chapter 12 – Weathering, Soil and Erosion

Ms Martel Weathering Weathering is the breakup of rock due to exposure to processes that occur at Earths surface Geologists group weathering processes under two headings mechanical and chemical weathering . Rose . AnnAgo. IV-6 . BEEd. WHITTLING . WIND . Bryce Canyon in Utah is a weathering wonder. Weathering and erosion have whittled away the rocks there for millions of years.. Today . huge hoodoos rise from the canyon floor. Hoodoos are rock pillars with shapes on their tops. They tower nearly 610 meters (2,000 feet) above the ground.. Earth’s Changing Surface . Earth is a constantly changing body affected by . natural forces. :. On the . Inside. :. Plate Tectonics . = moving of Earth’s Plates driven by . convection currents. Earthquakes & Volcanoes. Scenario #1. Flood water pounds against a canyon wall and wears it down.. Weathering. Scenario #2. Rain washing soil away from a hillside. Erosion. Scenario #3. Layers of sediment forming at the bottom of the ocean. another.. 2 . kinds:. 1) . Rill erosion. is the erosion by running water in small channels. , on the side of a slope.. 2) . Gully erosion. is when a rill channel evolves to become deep and wide.. By the end of this section you will be able..... To name and explain the causes of soil erosion.. Describe in detail how human activities can cause soil erosion.. Name and explain the primary methods of soil conservation.. What Is An . Ecoregion. ?. Ecoregion. - . a major ecosystem with distinctive geography, characteristic plants and animals, ecosystems, and receiving uniform solar radiation and moisture . Sometimes called an ecological region or bioregion. V-Map. 1 side for chalk. 1 side for . m&m’s. . Do Now. SWBAT describe mechanical weathering. 1. Where do pebbles and small particles of rock come from?. 2. . Did anyone carve pumpkins this weekend?. Unit 7 notes. Weathering. What is it?. Disintegration and Decomposition of rocks . Where does it happen?. At or near the surface of the Earth. Weathering. What does this process look like?. Weathering. Unit 7 notes. Weathering. What is it?. Disintegration and Decomposition of rocks . Where does it happen?. At or near the surface of the Earth. Weathering. What does this process look like?. Weathering. Weathering. Notes. Weathering. - The surface processes that break down rock into small pieces called sediment. . Two Types of Weathering. MECHANICAL WEATHERING. – . . Physical. processes that break rock into fragments with the . The creation of sedimentary rocks. Weathering and Mass Movement. Objectives:. 1. Describe the processes by which erosion wears down and carries away rock. 2. Distinguish between chemical and mechanical weathering. weathering and erosion. The process of weathering and erosion are the main forces behind landscape types. . However, they are not the only reason for a plain, plateau, or a mountain region to form. . Chapters 14, 15, 16, 17, and 18. SES3. Students will explore the actions of water, wind, ice, and gravity that create landforms and systems of landforms (landscapes). . a. . Describe how surface water and groundwater act as the major agents of physical and chemical weathering. . What processes cause this to happen?. What can you say about the speed of these processes?. Inference Point. Rockies. 80 milllion years old. Appalachians. 480 million years old. Soil: the foundation for agriculture.