PPT-Weathering, Erosion, Deposition and Geologic Time Scale

Weathering Weathering is the process that breaks down rock and other substances at the Earths surface Heat cold water and ice all contribute to weathering Repeated freezing and thawing for example can crack rock apart into smaller pieces . Weathering. , Erosion and Deposition. . How can wind and water change our landscapes?. . Weathering- the . destructive processes . by which materials at or near the Earth’s surface are changed in color, texture, composition, firmness or form. . formation of landforms. 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. . Chapter 7 lesson 4. What is the geologic time scale?. Geologists use the geologic time scale to show Earth’s history.. It is a record of the geologic events and the evolution of life forms as shown by the fossil record.. 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.. 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. a. Fossils. 3. Geologic Time Scale. 4. Geologic Belts. 5. NC Geologic History. How do we know . geologic . history. ?. Earth's History. Earth's history spans over a length of . 4.5 billion . years. Geologists have divided that time into units based on major geologic events and life forms. Predict how weathering might reshape surface features (topography). Weathering and Erosion. The top part of the lithosphere—the earth’s surface—changes as rocks are broken down to smaller pieces and carried away.. 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?. Wind and Water. Weathering- the process of wearing of rock and clay with natural means. This can be caused by wind,water,and plants.. Ex. Landscape Arch in Utah is and example of weathering. Ex. New Mexico’s . 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. Normally we think of time in terms of days or years but geologists commonly refer to events that happened millions or billions of years ago. For example earth is approximately 4.6 billion years old. GEOLOGIC TIME. Weathering. : the breaking up of rock into smaller pieces . Erosion. : the movement of sediment from place to place by wind, water, ice, or gravity. Deposition. : the re-depositing of sediments in a new location following erosion . The. . Erosion-Deposition. . Process. Constructive vs. Destructive. Constructive process build up features on Earth’s surface. Lave erupting from a volcano hardens and forms new land on the area where lava falls..