Lab 5 Assignment

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School

Georgia State University *

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Course

1113L

Subject

Geography

Date

Apr 3, 2024

Type

docx

Pages

7

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Lab 5: Weathering GEOG 1113L – Introduction to Landforms Lab Name: __ Thuan Nguyen ___________ I. What is Weathering? 1. What does weathering create/provide and what would Earth’s surface be composed of if weathering did not happen? - It produces the inorganic substances in the soil that plants need to grow. The Earth's surface was previously made up of solid bedrock. 2. What is the difference between weathering and erosion? - The difference between weathering and erosion is that weathering breaks down and alters rock material, while erosion is the process that transports the weathered rock debris. Weathering prepares the rock to be moved, while erosion is when the rock gets transported . 3. Describe the process of frost wedging (frost action). - Water enters rock pores and freezes. The expanding ice builds up internal pressure, fracturing the rock. 4. Similar to frost wedging, _ Salt crystal growth ________ fractures rocks through crystal growth within the pores of the rock. These crystals originate from ____ minerals dissolved in the water ______ inside the rock that later evaporates and leaves behind _ mineral grains ______. 5. The two previously mentioned types of weathering are both forms of what? - Granular Disintegration 6. Which type of weathering causes metal to rust? - Oxidation 7. Weathering that alters minerals in a rock via water, oxygen, carbon, and/or other organic acids is called what? - Chemical Weathering 8. Which type of weathering causes karst topography? - Carbonation weakens limestone. 9. Name three features you might find in a karst landscape. - Caves, Dry valleys and Sink holes. 10. What is one fact (from the video) about caves that you find interesting? - Caves contain unique ecosystems that support life.
11. Tree roots, lichen, and humans all play a part in weathering as well. Which type of weathering is this called? - Biological Weathering
II. Weathering Resistance Use the two images below to answer questions about weathering resistance. Assume all rock layers in both images have been subjected to the same type/amount of weathering. Image A: 1. Which color/pattern represents a rock layer that is MOST resistant to weathering compared to the others? - Dark Grey 2. Which color/pattern represents a rock layer that is LEAST resistant to weathering compared to the others? - Black layer 3. Which colors/patterns represent rock layers that share the same level of resistance to weathering compared to the others? - White player with black line.
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