Copy of KWAL 5 - Weathering GIZMO Activity A

G: Kolton R: Khai A: Stephen B: Makiya Date: 3-26-19 Hour: 6 G# 28 Activity A: Types of weathering Get the Gizmo ready: ● Select the ANIMATION tab. Check that Frost wedging is selected. Introduction: Mechanical weathering occurs when rocks are physically broken or worn down. Chemical weathering occurs when the minerals in the rock are changed by chemical reactions. Lesson Purpose: Identify the most common ways in which weathering occurs. 1. Observe: Read the text about frost wedging, then click Play. A. In the process of frost wedging, how does ice cause cracks in rocks to become larger? Whenever the water freezes into ice it gets bigger and cracks the rocks. B. Is frost wedging more important in a warm or a cold climate? Frost wedging more important in a cold climate. 2. Observe: Read about and look at the animations for the other major types of weathering: Abrasion, Pressure release, Dissolving, Clay formation, and Rusting. A. What are three different ways that rocks can be worn down by abrasion? Sand carried by wind, sediments that are carried by water, small rocks and stones dragged by glaciers. B. How can a large block of granite form layers like an onion? If granite gets exposed at the surface, it is not under a lot of pressure than it was when it formed deep under the Earth. This pressure release allows the rock to expand, & this causes it to crack and fall off in layers, like an onion. C. What type of rock is affected by dissolving, and what features result? Limestone isa rock that can dissolve when rain mixes with Carbon Dioxide. This can form underground caves, streams, and could lead to sinkholes. D. How does clay formation affect a rock? Clay absorbs up the water and can expand when it gets cold. The rock can crumble when it turns into clay from its reaction with the water. E. Which part of a rock will undergo rusting? The iron in the rocks can rust. 3. Fill in: Scientists use the terms “oxidation,” “carbonation,” “hydrolysis,” and “exfoliation” for different types of weathering. Identify each type of weathering below with the appropriate This study source was downloaded by from CourseH on 02-10-2022 03:20:00 GMT -06:00 term. Pressure release: : Exfoliation Dissolution: Carbonation Clay formation: Hydrolysis Rusting: Oxidation 4. Observe: Select Other. Read the descriptions of each type of weathering, then match each to its description below. Type of correct letter in front of each term. B 1. Salt weathering A. Weathering from chemicals produced by colonies of algae and fungi. D 2. Heat expansion B. Weathering that occurs when crystals grow. C 3. Root weathering C. Weathering caused by the growth of trees. A 4. Lichen growth D. Weathering common in desert climates