Weathering and Erosion

Slides:



Advertisements
Similar presentations
Ms. Leung C1 Review. Changing of the Earth’s surface by breaking it down 2 processes- WEATHERING- the breaking down of the materials of Earth’s crust.
Advertisements

SOL 5.7 Weathering
Rocks and Weathering (pages 238–245)
Weathering.
Weathering Essential Vocabulary.
I will only call on 3 of you to share
Topic 4: Weathering, Erosion and Deposition
The pieces or particles of rock (large and small)… ADD HERE
Weathering & Erosion.
Rocks and Weathering Chapter 6 Section 1. Weathering and Erosion  Weathering is the process that breaks down rock and other substances at Earth’s surface.
Weatheri ng Weathering is the physical and chemical breakdown of rocks at the Earth’s surface. The pieces or particles of rock (large and small) that are.
Physical (Mechanical) Weathering
Formation of Sedimentary Rock!
Weathering.
WEATHERING AND EROSION. WEATHERING Weathering is a type of erosion. Weathering happens when rocks are exposed to… – Atmosphere – Hydrosphere – Living.
Mechanical and chemical forces break down rock When you are walking in your neighborhood how do you think the small rocks are formed?
Weathering and Erosion
Weathering and Erosion Weathering is… When rocks are broken apart and create sediments.
8-1 Rocks and Weathering How do rocks and weathering affect Earth’s surface? What are the causes of mechanical weathering ands chemical weathering? What.
W EATHERING Weathering, Soil, and Erosion
Earth Science With Mr. Thomas. What is weathering & erosion? The breakup of rock due to exposure to processes that occur at Earth’s surface. There are.
Weathering.
Weathering and Soil Formation
AIM: What causes weathering and erosion?. Weathering is the physical and chemical breakdown of rocks into smaller pieces called sediment. Due to: Air.
Weathering and Soils Practice Test. QUESTION: What kind of weathering is represented by the following picture?
Weathering. What is Weathering? The physical, chemical, and biological processes that break down rocks and minerals, turning large particles into smaller.
» Weathering is the breakdown and the wearing a way of rocks.
Aim: What is weathering ? I. Weathering – the breakup of rock due to exposure to the atmosphere. A. Erosion – is the removal and transport of earth materials.
Mechanical and Chemical. _ jpg
Weathering, Erosion, and Deposition
Chapters 4 & 5 Weathering and Erosion Weathering Weathering is the breaking down of rocks and other materials 2 types of weathering –Mechanical –Chemical.
Weathering Chapter 10. Essential Questions What causes mechanical weathering? What causes chemical weathering? What factors determine how fast weathering.
Soil Formation By :Reynaldo Thomas. Formation of Soil  Soil is an accumulation of tiny particles of rock which are formed when rocks are weathered. 
Weathering and Soil Formation
1 9.1 Weathering. 2 Describe how potholes form. Describe how water flows down into cracks that form of potholes.
Weathering, Erosion, and Deposition
WEATHERING AND EROSION WEATHERING AND EROSION Questions: What is meant by weathering? How does weathering happen? What areas tend to have more weather.
Weathering. I can…. Identify the layers of the earth Describe how landforms can be changed by weathering and erosion Explain how water can change landforms.
Weathering & Erosion Weathering & Erosion. Weathering and Erosion Weathering is the break down of rocks that have been exposed to the atmosphere Once.
Weathering 01/05/ pgs IN: How is sediment/soil formed?
Weathering The process by which rock is broken down into smaller pieces May be physical or mechanical (they mean the same thing) May be chemical May be.
Weathering 1/4/ a pgs IN: How does sediment form? Glue in the new Table of Contents.
Weathering The breakdown of rocks into small particles at the Earth’s surface.
Weathering and Erosion. 1.Weathering – The chemical and physical processes that break-down rock at Earth’s surface. 2.Mechanical weathering – The type.
Weathering.
Weathering, Erosion, and Deposition
Rock Cycle Unit 3 – What is weathering
Lab: What effect does increased surface area on weathering?
Weathering is the physical and chemical breaking down of rocks (the lithosphere) into smaller pieces or particles by wind, water, ice, plants, animals,
7-1: Weathering
Weathering and erosion
Weathering Weathering is the physical and chemical breakdown of rocks at the Earth’s surface. The pieces or particles of rock (large and small) that are.
Forces That Shape Our Earth:
Mechanical and chemical forces break down rock
Mechanical & Chemical Weathering
Chapter 12 Weathering The breakup of rock due to exposure to processes on the Earth’s surface.
Weathering.
Weathering & Erosion.
Physical (Mechanical) and Chemical Weathering
Weathering is the process that breaks down rock and other substances at Earth’s surface.
Weathering and Erosion Mr. Scichilone
Weathering Chapter 5.1.
Rock is physically broken into smaller pieces
Weathering.
TOPIC IX: WEATHERING AND EROSION
Weathering Chemical and Physical & Erosion.
Weathering Chapter 5.1.
Weathering.
9.1 Weathering.
Three Basic Definitions
Presentation transcript:

Weathering and Erosion

Definition: weathering Weathering is the physical or chemical alteration of rocks near or at the Earth’s surface As a rule: ROCKS are NOT HAPPY BEING EXPOSED TO THE AIR!

Types of weathering: Physical weathering: when a rock is broken down into smaller parts by being acted on physically. There are several types of physical weathering: Frost wedging (aka frost action) Root wedging Abrasion (aka sandblasting)

Frost Wedging Frost wedging occurs as a result of a special property of water. Nearly all matter contracts or shrinks when it is cooled – water, however EXPANDS!

Definition: Frost wedging is physical weathering where rock is split apart by the expansion of water freezing in small cracks.

Some examples of frost wedging:

Root Wedging Plants and trees send out roots to seek water and nutrients from the ground. These roots can move into small spaces and cracks in their search. When roots end up in cracks in rocks, they eventually grow larger and can split the rock apart.

Definition: root wedging is physical weathering caused by plant and tree roots splitting rock apart.

Abrasion (including sand-blasting) Wind and water can carry tiny particles of debris – rock and dust. When these particles are washed against or blown past rock, it can wear the rock down like sanding wood.

Definition: abrasion is physical weathering where small particles moving in wind or water abrade rock, smoothing it out. Some rocks are abraded by wind-blown sand in arid regions.

Abrasion also happens at beaches and in rivers and streams – here the particles doing the weathering are carried by the water.

Types of weathering: Chemical weathering: when a rock is broken down into smaller parts by having its chemical structure changed. There are several types of chemical weathering. We will be most concerned wtih: Oxidation Dissolution

Oxidation: When oxygen is added to the chemical structure of a mineral or rock, it changes the physical structure of the mineral or rock. This is best seen in rust.

Definition: oxidation is chemical weathering where oxygen is added to other elements. A chemical formula change might look like this: Iron + oxygen = iron oxide or…. Fe + O -> Fe2O3 Iron oxide is rust. Notice that while iron is hard and strong, rust is not – it easily breaks apart… (Chemical weathering)

Dissolution Many materials are dissolved by water. From salt and sugar to carbon dioxide and other gases, water dissolves many things. Acids can also dissolve materials.

Definition: dissolution is chemical weathering where rock is dissolved by water or acid.

Factors that increase weathering: Exposure Particle size Mineral composition Climate Why????? Think about it! Meet with a partner, and talk about why each of these things would increase weathering. Then find another two people and share your ideas. We’ll talk about them!