Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Name Date Class Note taking Outline LESSON 1 Weathering Objective: Students should be able to explain what weathering is and describe the differences in how mechanical and chemical weathering break down rock and change landforms on the surface of Earth. A. Weathering and Its Effects (Pg. 149) 1. The chemical and physical processes that change objects on Earth’s surface over time are called . 2. Over thousands of years, breaks up rocks into smaller pieces. B. Mechanical Weathering (Pg. 150-151) 1. During , physical processes break rocks into smaller pieces. 2. Mechanical weathering does not change the of the rock. 3. When mechanical weathering breaks a large rock into smaller pieces, the total of the rock increases. 4. Between sandy and clay soils, soil holds more water and nutrients because it consists of smaller particles that have more surface area. 5. In , water enters cracks in rocks and freezes. Water when it freezes and makes the cracks larger. 6. Grinding rock away by friction or impact is called 7. . growing in a crack in a rock and animals burrowing through loose rock can cause mechanical weathering. C. Chemical Weathering (Pg. 152-153) 1. During , the materials that make up rocks are changed into new materials. 2. Water is an important agent of weathering because most substances in water. 3. A(n) is a more powerful weathering agent than water. a. The measure of acidity is called b. An acid has a pH less than . c. Rain weathers rock because rain is slightly d. . . rain contains pollutants that make its pH less than 5. 4. Oxygen combines with other elements or molecules during . a. Most oxygen used in oxidation comes from the . b. The product of oxidation is a(n) . c. Oxides are useful because they form , which people use to obtain metals. d. The part of a rock oxidizes the most because it has more contact with oxygen in the air. D. What affects weathering rates? (Pg. 154) 1. Mechanical and chemical weathering depend on and temperature. a. Mechanical weathering occurs fastest in areas that have a lot of changes. b. Chemical weathering is fastest where the climate is warm and . c. Overall, weathering occurs fastest in regions near the 2. The type of . also affects how fast weathering occurs. The most easily weathered in a rock determines how quickly the rock weathers. Directions: Complete the chart by choosing terms from the word bank and completing each sentence. abrasion intense temperatures acid rain animals oxidation ice wedging normal rain plants Mechanical Weathering 1. cause(s) weathering because 2. because because . cause(s) weathering because 5. . cause(s) weathering because . is the process that combines 7. . cause(s) weathering 4. 6. . cause(s) weathering 3. Chemical Weathering . has a pH of about 5.6 and can cause 8. . has a pH of 4.5 or less and causes . Name Date Class Content Practice A LESSON 1 Weathering Directions: Complete this concept map by choosing statements and writing them in the correct spaces. Rock and water grind other rock. Pollutants dissolve in water. Animals burrow into soil. Ice expands cracks in rock. Molecules combine and form oxides. Plants cause rocks to crumble. Intense temperature causes rocks to expand. 1. Mechanical Weathering Weathering 2. Chemical Weathering Key Concept Builder LESSON 1 Weathering Key Concept How does weather break down or change rock? Directions: Use the clues and the terms listed below to complete the puzzle. abrasion chemical weathering pH acid crumbling surface area acid rain ice wedging burrowing oxide Clues Across 2. weathering caused by grinding away at rock 5. what animals do that breaks down rock 7. the process that changes minerals into new minerals 9. weathering caused by plants and animals 10. rain with a pH of 4.5 or less Weathering and Soil Down 1. weathering caused by water that freezes 3. all the space on the surface plane of an object 4. the product of oxidation 6. a measure of acidity 8. anything with a pH between 0 and 7 For Your Notebook: Mechanical and Chemical Weathering Define weathering: Mechanical Weathering Cause Effect 1. Ice Wedging 2. Explain how ice wedging causes weathering. 3. Abrasion. 4. Explain how abrasion causes weathering. 5. Plants-Mechanical 6. Explain how plants cause weathering. 7. Animals- 8. Explain how animals cause weathering. 9. Water Chemical Weathering Effect 10. Explain how water causes chemical weathering. 11. Chemicals 12. Explain how chemical causes chemical weathering. 13. Oxidation 14. Explain how oxidation causes chemical weathering.