1. Earth Science BL. 1 Rate of Weathering Isabella, Rebecca, and Danny

2. I. What is “rate of weathering”? Rate of weathering is how fast or how slow a rock is weathered, chemically or physically.

3. II. Factors that affect the rate of weathering 1.Rock Composition- The materials in a rock can have an affect on the rate of weathering. Top: Granite Bottom: Limestone

4. II. Factors cont. 2. Surface Area- The more surface area that is exposed, the faster the rate of weathering. Above: crushed rock Below: whole

5. II. Factors cont. 3. Climate- Temperature and moisture, or humidity, are huge factors in the rate of weathering.

6. II. Factors cont. (Will this end?) 4. Topography- Steep slopes= massive movements of rocks (thanks to gravity, of course) Top: topographic map Bottom: land slide

7. II. Factors cont. (last one!) 5. any others? Differential weathering- different types of weathering occurring in different parts of a rock Top: Chemical Bottom: Mechanical

8. III. Examples Hot and dry climate= very slow weathering Hot and humid climate= very fast weathering

9. III. Examples Mid temp and moderate precipitation= fair amount of weathering