8 E 5 A 1 Develop and use

8. E. 5 A. 1 Develop and use models to explain how the process of weathering, erosion, and deposition change surface features in the environment

• Weathering, erosion, and deposition are processes that act together to wear down and builds up Earth's surface. • These processes have occurred for billions of years.

Weathering • any process that breaks down rocks and creates sediments. • There are two forms of weathering, chemical and mechanical (physical) • Chemical weathering is decomposition of rock caused by chemical reactions resulting in formation of new compounds. • Mechanical (physical) weathering is the breakdown of rock into smaller pieces.

Erosion • the process by which natural forces move weathered rock and soil from one place to another • Gravity, running water, glaciers, waves, and wind all cause erosion. The material moved by erosion is sediment.

Deposition • occurs when the agents (wind or water) of erosion lay down sediment • Deposition changes the shape of the land

• Erosion, weathering, and deposition are at work everywhere on Earth. • Gravity pulls everything toward the center of Earth causing rock and other materials to move downhill. • Water’s movements (both on land underground) cause weathering and erosion, which change the land’s surface features and create underground formations

The effects of these processes are as follows • Changes in shape, size, and texture of landforms (i. e. mountains, riverbeds, and beaches) • Landslides • Buildings, statues, and roads wearing away • Soil formation • Washes soil, pollutants, harmful sediments into waterways • Causes metals to rust • Reduces beaches, shorelines • Forms new landforms

Geologic Cycle • a collective term used to describe the complex interactions between the component sub-cycles of tectonic, hydrologic, rock, and the biological cycling of elements known as the biogeochemical cycle • These various sub-cycles influence each other and may produce natural hazards and processes important to environmental geology such as landslides, earthquakes, volcanic activity, flooding, groundwater flow, and weather • The rock cycle is influenced by all the other geologic sub-cycles

Create a foldable… • Terms included: WEATHERING, EROSION, DEPOSITION, & GEOLOGIC CYCLE • In the flaps… • Write the definition • Include BOTH TYPES of WEATHERING • What did we do to the crayon for WEATHERING, EROSION, & DEPOSITION? Explain and/or draw • GLUE IN NOTEBOOKS