Weathering
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This document defines weathering as the process of disintegration and decomposition of rocks at the Earth's surface. It discusses two main types of weathering: mechanical and chemical. Mechanical weathering is the breakdown of rocks through physical processes without changing their chemical composition. Some key agents of mechanical weathering discussed are frost action, pressure release, insolation, and block disintegration.
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Precipitation. by engr. ghulam yasin taunsvi
1. Rain - liquid deposits falling from the atmosphere
to the surface
- with a diameter > 0.5 mm
- < 0.5 mm: drizzle
- max. size: about 5 - 7 mm
(too large to remain suspended)
- beyond this size, inter-molecular cohesive
forces become to weak to be held in the
mass of water together as a single drop
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1. Rain - liquid deposits falling from the atmosphere
to the surface
- with a diameter > 0.5 mm
- < 0.5 mm: drizzle
- max. size: about 5 - 7 mm
(too large to remain suspended)
- beyond this size, inter-molecular cohesive
forces become to weak to be held in the
mass of water together as a single drop
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The document discusses the main types of precipitation: rain, snow, sleet, and hail. Rain falls as liquid when temperatures are above 0°C and is the most common type. Snow forms from ice crystals when temperatures are cold enough to freeze water vapor directly into ice. Sleet consists of frozen rain droplets that form when rain passes through a layer of freezing air. Hail develops when rain freezes into balls or chunks of ice that accumulate additional layers of ice and vapor as they are pushed between cold and warm air currents.
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Aravind J is seeking an environment that exposes him to varied situations to enhance his learning. His long term goal is to develop expertise in technology and its applications. He has a B.Tech in computer science from B.S. Abdur Rahman University with a 7.13 CGPA. He has experience with programming contests, symposiums, and soft skills training. His mini projects include an online bank application and online aptitude test. His main project involved task scheduling in a cloud computing environment using scheduling and mapping algorithms. He has technical skills in languages like C, C++, Java, and frameworks like PHP. He completed inplant training at HCL Technologies in software development and security.
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This document discusses different types of weathering and mass movement. It describes weathering as the breaking down and decay of exposed rock at or near the Earth's surface. Weathering occurs through mechanical, chemical and biological processes. Mechanical weathering breaks rocks into smaller pieces without changing their chemical composition, through processes like thermal expansion and frost cracking. Chemical weathering alters the chemical composition of rocks through processes like oxidation and hydrolysis involving water and climate factors. Mass movement involves the downward and outward movement of rock and soil under the force of gravity, such as through rock falls, landslides, and talus slopes.
Weathering and erossion
Weathering and erosion shape Earth's surface through physical and chemical processes. Weathering breaks down rocks and minerals through mechanical and chemical processes. Mechanical weathering breaks rocks into smaller pieces without changing their composition, while chemical weathering alters the chemical makeup of rocks and minerals. Erosion transports weathered materials from their source, most commonly by water, wind, ice or gravity. Mass wasting specifically refers to the downslope movement of earth materials under the force of gravity by various processes such as rock falls, debris flows, slides and slumps. Factors like steep slopes, water saturation, earthquakes and removal of vegetation can make areas more prone to mass wasting.
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Weathering
- 2. Introduction Definition Weathering Types of weathering Mechanical weathering Agents of Mechanical weathering Frost Action Pressure Release (Exfoliation) Insulation Some minor Agents of Mechanical weathering
- 3. “Weathering is the process of disintegration and decomposition of rocks of the earth’s surface”. Weathering
- 4. Mechanical weathering Disintegration by physical agents Composition of rock does not change
- 5. Frost Action Weathering process by ice Water increases in volume by about 9% when it freezes Produces about 1890 metric tons pressure for every 1 ft2 Common in high altitude zones
- 7. Pressure Release (Exfoliation) Metamorphic and intrusive igneous rocks are under pressure Upper layer is removed by erosion Due to pressure release the cracks are formed
- 9. Insolation Common in arid and desert regions Temperature is high in day time and low in night Disintegration due to expansion and contraction Block Disintegration Granular disintegration
- 11. Rainfall Gravity Salt wedging