Name: Block: Date: Interactive Weathering and Erosion

Transcription

1 Name: Block: Date: Interactive Weathering and Erosion Directions: Go to the following website ducational%20materials/documents/elearning/module07swf.swf and complete the questions. Slide Title Weathering Overview: read the screen and answer the questions 1. What is weathering? 2. What is mechanical weathering? 3. What is chemical weathering? 4. Describe differences between mechanical and chemical weathering. 5. What two processes are intimately involved in weathering? 6. What type of climate conditions enhance (speed up) chemical weathering? 7. What type of climate conditions enhance physical weathering? 8. What is a rain shadow effect? Explain what causes it (use pictures to help with your explanation). Click the Next button and advance to slide title Mechanical Weathering Overview: read and answer the questions 1. Define mechanical weathering.

2 2. List seven different types of mechanical weathering. Click the Next button and advance to slide title Mechanical Weathering Frost: read and answer the questions 1. Why is water one of the most effective processes of mechanical weathering? 2. Where does most frost wedging occur? 3. Why can t the water expand upwards when freezing in a crack of a rock? Click the Next button and advance to slide title Mechanical Weathering Exfoliation: read and answer the questions 1. In what regions does most exfoliation occur? 2. What is exfoliation? 3. Why do rocks break off in layers parallel to the rock face? 4. Which rock type does exfoliation most commonly occur on? Click the Next button and advance to slide title Mechanical Weathering Thermal Expansion: read and answer the questions 1. Where does thermal expansion and contraction mostly occur?

3 2. Are rocks good conductors of heat? 3. Is thermal expansion and contraction a slow or fast process? What other factors can help a rock break apart once thermal expansion has begun? 4. Can fires fracture rock? If yes, how? Click the Next button and advance to slide title Mechanical Weathering Crystal Growth: read and answer the questions 1. What type of environment does crystal growth occur in? 2. Why is the environmental setting for weathering by crystal growth fairly restricted? 3. During winter why should you be careful about how much salt is put on icy roads or walkways? Click the Next button and advance to slide title Mechanical Weathering Tree Roots: read and answer the questions 1. Where does tree root growth occur most often? 2. Explain how tree roots break apart rock. Click the Next button and advance to slide title Mechanical Weathering Abrasion: read and answer the questions 1. Where does abrasion occur? 2. What is abrasion?

4 3. Where is abrasion typically the harshest? Click the Next button and advance to slide title Chemical Weathering Overview: read and answer the questions 1. What is chemical weathering? 2. List three types of chemical weathering. 3. What type of climate is optimal for chemical weathering? 4. How do plant rootlets cause chemical weathering? 5. Why is soil an effect of chemical weathering? Click the Next button and advance to slide title Chemical Weathering Dissolution: read and answer the questions 1. Where does most dissolution occur? 2. What is dissolution? Give a couple of examples. 3. What role does acids plays in chemical weathering with regards to dissolution? Be specific. 4. What types of climates are particularly suited to enhancing dissolution reactions?

5 5. What type of climate produces karst? Click the Next button and advance to slide title > Chemical Weathering Oxidation: read and answer the questions 1. What type of region does most oxidation occur in? 2. What is oxidation? Describe the process. Also, give an example. Click the Next button an advance to slide title Chemical Weathering Hydrolysis: read and answer the questions 1. Explain hydrolysis. 2. What type of regions is hydrolysis most common? 3. How do clays form? 4. How does soil, a renewable resource, become a nonrenewable resource?