1. Changes to Earth’s Surface Unit Week 24 Directions 1.Prepare your desk for science. Science notebook 2.Use voice level 2 (conversation) and notebook pg. 60 to discuss the following question: What is weathering? What are some of the causes of weathering?

2. Targets & Warm Up Targets: Students will describe causes and effects of changes to Earth’s surface. Students will determine how weathered material moves. Warm Up: What is weathering? What are some of the causes of weathering?

3. How can you observe a mineral wear away? (pg. 260) 4 groups of students Materials: – 1 plastic jar with a lid – 4 pieces of chalk You need to split each piece into 2 so you have a total of 8 pieces – 10 rocks – 1 plate

4. Table of Contents DateTitlePage 3-10-15Erosion61 Once you are finished with the Table of Contents, go to page 61 and add the title and date to the top of the page.

5. Erosion The moving of pieces of soil or rock by mechanisms including gravity, wind, water, ice, or plants or animals. Causes: Moving water Moving ice (glaciation)

6. Erosion: Moving Water Moving water carries away materials from the land – Streams and rivers carry pieces of rock far away – The running water carves into the land and forms valleys or canyons

8. Erosion: Moving Water Moving water carries away materials from the land – Waves pound against cracks in rocks on the shore and pieces of rock break off (weathering) – The waves carry the pieces away – Beaches and other landforms develop

10. Erosion: Ice (Glaciation) Occurs in colder parts of Earth – Antarctica and Greenland Moving ice erodes landforms Glaciers are huge sheets of ice – Move very slowly as gravity pulls them downhill – As it slides, it wears away bits of rock and soil – Even small glaciers can easily rip rocks apart and carry large chunks for long distances

11. Erosion: Ice (Glaciation)

12. Weathering vs. Erosion How are weathering and erosion similar and different?

13. StudyJams: Weathering and Erosion (3 minutes) Video

14. Writing Activity Answer the following question: How are weathering and erosion similar and different? 4 th grade paragraph (6 – 8 sentences) Include examples to help explain your thoughts

15. Targets (Revisited) Students will describe causes and effects of changes to Earth’s surface. Students will determine how weathered material moves.

16. Homework SubjectHomeworkDue Date ScienceScience Fair Experiment3/16 March 16th