Weathering & Erosion
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- Jade Cole
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1 Weathering & Erosion Directions: You ve been assigned a Discovery Education Video (22 minutes) you will need to log in to the Discovery Education site, watch the video and complete the following! You can stop and rewind at your leisure! 1. Define Physical (Mechanical) Weathering: Chemical Weathering: 2. How are ice and water involved in mechanical weathering? 3. How is temperature related to mechanical weathering?
2 4. Explain how oxygen is connected to chemical weathering. 5. What are some factors that you think can control the rate at which a rock weathers? 6. Video Review Question #1 The Statue of Liberty has greeted both visitors and immigrants to the shores of New York for many years. Periodically this majestic statue, which sits on Liberty Island in the Hudson River, must be repaired due to the damage caused by weathering. What might you suggest can be done to the statue that may help to prevent, or at the very least, slow down the damage? 7. What types of weathering can cause a car to age? Be as specific as possible. 8. What type of weathering created this formation? How can you tell? 9. Describe what you would expect a rock to look like after being recently weathered by frost action. (Use descriptive adjectives such as smooth, rough, jagged, rounded, etc.)
3 10. If a cubic shaped rock was left in an energetic stream, how would you expect it to look after a few years? 11. What would you do to (or use on) a building to prevent it from weathering too quickly? Mechanical and Chemical Weathering Use your notes or the ipad to answer the following questions: 1. Compare chemical and mechanical weathering. 2. How are ice and water involved in mechanical weathering? 3. How is temperature related to mechanical weathering? 4. What is hydrolysis, and what type of weathering is it? 5. Explain how oxygen is connected to chemical weathering. 6. What are some factors that you think can control the rate at which a rock weathers?
4 7. Consider the climate and physical features of the region in which you live. Does it rain frequently? Is it dry or windy? How does the temperature vary during the year? Based on your knowledge of the climate and physical features of your area, predict what types of weathering are likely to occur. 8. What type of weathering created this formation? How can you tell? 9. What type of weathering created this formation? How can you tell?
5 Part 2: Multiple Choice: Write the letter of the correct answer on the line. 1. An example of an agent of erosion is (a) water (b) glaciers (c) wind (d) all answers are correct 2. When two pieces of different types of rock are rubbed together, one of the rocks often breaks into smaller pieces, this is an example of (a) chemical weathering (b) mechanical weathering (c) fission (d) deposition 3. Rust forming on the surface of bridges is an example of (a) chemical weathering (b) fusion (c) mechanical weathering (d) fission 4. Which climate would result in the least amount of weathering? (a) rain forest (b) desert (c) tropical forest (d) pine forest 5. This results when compacted snow accumulates over a period of time and begins to slide forward (a) delta deposit (b) blizzard (c) glacier (d) ice cap 6. Abrasion and deflation are technical terms that refer to weathering and erosion caused by the (a) wind (b) water (c) chemicals (d) seasons 7. Which property of water makes frost action a particularly effective means of weathering? (a) water dissolves many substances (b) water cools that environment when it evaporates 8. The reason why a variety of different soils exist in North Carolina is (c) water is vital it living things (d) water expands when frozen (a) distance from rivers and lakes (b) bedrock composition and climate (c) amount of water available (d) amount of human activities 9. Which force of erosion acts to produce avalanches and landslides? (a) sea waves (b) running water (c) winds (d) gravity 10. As the amount of plant life, such as trees, is decreased in a region by human activity such as lumber cutting practices, the amount of erosion in these areas (a) Increase (b) Decrease (c) Remain the same
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