1. Changes to Earth’s Surface Unit Week 25 Directions 1.Prepare your desk for science. Science notebook Analysis sheet Green sheet Green sheet 2.Use voice level 2 (conversation) to continue to work on the analysis.

2. Targets & Warm Up Targets: Students will describe causes and effects of changes to Earth’s surface. Warm Up: What is weathering? What is erosion? What is deposition? Share an example of each.

4. Table of Contents DateTitlePage 3-18-15W.E.D. and Landforms63 Once you are finished with the Table of Contents, go to page 63 and add the title and date to the top of the page.

5. We can see weathering, erosion, and deposition occur in the formation of many landforms. Deltas Sand Dunes Beaches Rock pedestals Moraines Drumlins

6. Rock Pedestal Rock pedestals form when a more resistant layer of sedimentary rock sits above a softer layer. The desert wind blows sand particles against the rock. The lower, softer rock is eroded faster than the higher, more resistant rock. The most erosion is found about one meter above the ground. Here, more and larger sand particles are carried by the wind. Higher up, fewer and smaller particles are able to hit the rock.

7. When glacial ice melts, different types of rock are laid down that have been carried along by the glacier. Piles of these deposits are called moraines. Ground moraines are disorganized piles of rocks of various shapes, sizes and of differing rock types.

8. Drumlins are elongated hills of glacial deposits. They can be 1 km long and 500 meters wide, often occurring in groups. A group of drumlins is called a drumlin swarm or a basket of eggs. These would have been part of the debris that was carried along and then accumulated under the ancient glacier. The drumlin would have been deposited when the glacier became overloaded with sediment.

9. In a 4 th grade paragraph (6-8 sentences), choose one landform and explain how you can see weathering, erosion, and deposition in the formation of this landform. Deltas Sand Dunes Beaches Moraines Drumlins Rock pedestals

10. Example - Canyons Canyons are created by moving and flowing water from a river. First, a river travels over land. The water slowly wears away at the rock in its path and breaks it up into smaller pieces. As this happens, the river carves a shallow indent into the land. The river continues to flow and make the indent deeper until it forms a canyon. The rock that is weathered by the flowing water is eroded and carried away by the river’s water. When it reaches the end of the river, it is deposited in an area and may form a landform, such as a delta.

11. Reflection Activity Share paragraphs.

12. Extra time? Erosion Game http://www.kineticcity.com/mindgames/warper/

13. Targets (Revisited) Students will describe causes and effects of changes to Earth’s surface.

14. Homework SubjectHomeworkDue Date ScienceFinish landform paragraphThursday ScienceAnalysisMonday 3/23 ScienceDisplay BoardMonday 3/30