OBJECTIVES: 1. TO REVIEW TERMS INTRODUCED DURING YESTERDAY’S LESSON – DENUDATION, WEATHERING, EROSION, AND FREEZE- THAW ACTION. 2. TO INTRODUCE STUDENTS.

Slides:

Advertisements

Similar presentations

Weathering and Erosion

Advertisements

EQ: What is chemical and mechanical weathering?

DENUDATION: Erosion and Weathering

Shaping the Earth’s Crust

The Earth’s Crust Weathering & Erosion.

Weathering and Erosion

I will only call on 3 of you to share

Weathering, and Soil Formation

5th year Geography Ms Carr

Chemical Weathering.

Any comments????. Now how about this image??? CHAPTER 3 Weathering and Erosion FIRST YEAR GEOG MS CLIFFORD St Tiernans CS.

Objectives: 1. To review the terms ‘denudation,’ ‘erosion,’ and ‘weathering’ (freeze-thaw action & carbonation), along with surface landforms found in.

Earth’s Surface: Chapter 4 Section 1 Mechanical and Chemical Weathering Learning Targets: 1) I can describe how mechanical weathering breaks down rocks.

1A2 Geography 14 th April, 2015 Objectives: 1. To review the causes of carbonation and the formation of karst landscapes. 2. To explain the formation of.

Warm-up: What has occurred in these pictures? Please write a brief description.

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.

Weathering and Erosion

As you observe the following pictures think about this… Have the landforms undergone changes? What do you think caused the changes? How long do you think.

Weathering The breakdown of the materials of Earth’s crust into smaller pieces. It can happen through physical or chemical means and through natural and.

Weathering and Erosion Weathering means the process of breaking down rocks and other substances at Earth’s surface.

Weathering, Erosion and Distinctive Landscapes

Weathering and Erosion

Science Starter Pick up a post-it note at the front desk and answer the following questions… What is weathering? What is erosion? Place your post-it note.

The Earth’s Changing Surface

Weathering & Erosion.

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.

Weathering and Soil Formation

World Geography 3200/3202 October 7, 2010

Weathering Pg. 69.

Weathering and soil formation – section 2-1 Rocks and Weathering

Do you know the answers?  What is the salinity of water? the amount of salt dissolved in the water  Why is salinity important? if the salinity is too.

Weathering Weathering

Weathering and Soil Erosion

Constructive and Destructive Forces

R OCKS & W EATHERING Section 2.1 R OCKS & W EATHERING Weathering is the process that breaks down rock & other substances at Earth’s surface. Heat, cold,

Weathering The breakdown of the materials of Earth’s crust into smaller pieces. It can happen through physical or chemical means and through natural and.

Graphic organizers— Print off the blank pages for each student

Limestone Scenery.

Warm-Up How would you describe the difference between a new tombstone and one that is 100 years old?

Weathering and Erosion. Weathering The breakdown of the materials of Earth’s crust into smaller pieces.

Weathering and Erosion NOTES

EQ: What is chemical and mechanical weathering?

Weathering and Erosion Unit 3 Chapter 7. Weathering – the process by which rocks are broken up into smaller pieces by the action of water, the atmosphere.

Objectives: 1. To discuss lesson plans for the current term, and a revision schedule for the summer exam. 2. To collect Easter assignments and return exam.

Weathering and Soil Formation

WEATHERING AND EROSION WEATHERING AND EROSION Questions: What is meant by weathering? How does weathering happen? What areas tend to have more weather.

October 1st Pg The process of mountain building thrusts rock up to the surface of Earth. There, the rock is exposed to weathering. Weathering: is.

Investigation 3: Rocks and Weathering. Key Question How do different types of rocks weather?

Rocks and Weathering Chapter 2 Section 2 6 th Grade Team.

What is chemical weathering?

Land and Water Forms Wearing Down Landforms

What is Weathering? Weathering is a set of physical, chemical, and biological processes that change the physical and chemical properties of rocks and soil.

Learning Outcomes: 1.To be able to understand the terms Weathering and Erosion 2.To be able to understand and describe the different types of weathering.

Weathering and Erosion. 1.Weathering – The chemical and physical processes that break-down rock at Earth’s surface. 2.Mechanical weathering – The type.

 Take the title “Landscape Evolution”  Task:  Discuss with number 9 date all the different things that cause landscapes to change. 2 minutes  Now.

In this lesson you will: Distinguish between the terms physical weathering and chemical weathering. (k) Describe the mechanical processes by.

Weathering and Erosion

Weathering and Erosion

Weathering and Erosion

Weathering and Erosion

Shaping the Earth’s Crust

Weathering and Erosion

Weathering, Erosion and Deposition

Weathering and Erosion

Rocks and Weathering.

Weathering, Erosion, and Deposition

Weathering and Erosion

Denudation: Weathering and erosion

Warm-Up: Thur 5/1 What is the difference between weathering and erosion?

Weathering and Erosion

Presentation transcript:

OBJECTIVES: 1. TO REVIEW TERMS INTRODUCED DURING YESTERDAY’S LESSON – DENUDATION, WEATHERING, EROSION, AND FREEZE- THAW ACTION. 2. TO INTRODUCE STUDENTS TO CHEMICAL WEATHERING. 1A2 Geography 14 th April, 2015

Homework Let’s take a look at last night’s homework assignment. What answers did you give in response to questions 1& 2, page 103?

During yesterday’s lesson… We learned about: i. Denudation. ii. Erosion. iii. Weathering. iv. Freeze-thaw action – what kind of weathering is this an example of? What are the key differences between these processes?

Review 1. Denudation is the term used to describe the collection of processes that wear away the rock and soil of Earth’s crust. 2. Erosion refers to the breakdown of rock and the removal of rock particles. (Caused by moving air, moving water and moving ice.) 3. Weathering refers to the breakdown of rock in areas where it is exposed to the weather. Two categories of weathering – mechanical and chemical. Weathered rock is not transported. It accumulates on site to form scree.

Chemical Weathering Chemical weathering takes place when rocks are dissolved due to a chemical reaction. carbonation One example of chemical weathering is carbonation.

Carbonation We depend on fossil fuels in our daily lives, but their use has the potential to damage the environment. Fossil fuels provide energy for industry, power millions of cars around the globe, and provide heat for homes. The burning of fossil fuels for these purposes is leading to the release of a large amount of carbon dioxide (a greenhouse gas) into the atmosphere. Carbonation occurs when water vapour in the air combines with this gas.

Carbonation As rain forms in the atmosphere, it combines with the carbon dioxide to form a relatively weak carbonic acid. Although this carbonic acid is weak, it can make a significant impact on rock, particularly limestone. Limestone contains 80% calcium carbonate (a white mineral). The acid reacts with this, causing the rock to dissolve. As limestone is permeable, rainwater can pass down through it.

Rain water mixing with carbon dioxide. Effects of carbonation Carbonation

Carbonation: Karst Landscape Carbonation occurs in areas where bare limestone rock is exposed to the weather. These regions are known as karst landscapes, named after a limestone region in Slovenia called Karst. There is an example of a karst landscape in Ireland, the Burren, Co. Clare (we’ll be learning more about this place on Tuesday 21 st ).

Carbonation: Karst Landscape Limestone rock was exposed here millennia ago when enormous glaciers stripped the landscape of its soil covering. Carbonation has created a unique landscape here, resulting in the development of landforms on the surface and underground.