What changes the scenery?

Slides:



Advertisements
Similar presentations
Natural Agents of Change
Advertisements

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.
Changes to Earth’s Surface Chapter 9
Weathering and Erosion
Rocks and Weathering Booklet
Weathering D. Crowley, Weathering To know how rocks are weathered.
Science Focus Lesson SC.4.E.6.4 Weathering and Erosion
Weathering and Erosion
UNIT SEVEN: Earth’s Water  Chapter 21 Water and Solutions  Chapter 22 Water Systems  Chapter 23 How Water Shapes the Land.
Earth History Concept 1: Forces that Shape the Earth.
Science Focus Lesson SC.4.E.6.4 Weathering and Erosion Polk County Public Schools.
1 Ways moving water and ice changes the landscape.
Essential Question How does weathering and erosion impact earth’s surface features?
Chapter 8.  Erosion is the process that wears away surface materials and moves the sediments from one place to another.
Rocks and Weathering.
1 Drawing things together About how the scenery is changed.
THE ROCK CYCLE.
Forces That Shape Earth’s Surface 6.E.2.3 Explain how the formation of soil is related to the parent rock type and the environment in which it develops.
Forces that Shape the Earth Chapter 5, lesson 4.  Weathering: the breaking down of rock into smaller pieces by natural process  Ice  Moving Water 
At this very moment, although you may not see it, Earth’s land features are changing. Wind and water are working together to wear down the land in some.
The Rock Cycle Objective: Student will identify and classify the characteristics of the rock cycle by the end of the lesson.
5-3.1 Explain how natural processes affect Earth's oceans and land in constructive and destructive ways.
Weathering, Erosion and Deposition
Weathering and Erosion.
Forces That Shape Our Earth:
The Rock Cycle.
Weathering and Erosion.
How Do Weathering and Erosion Change the Land?
Rocks and weathering.
Weathering Test Review
8.4 Sedimentary rocks Weathering breaks up rocks into smaller pieces, or sediments. There are 3 types of weathering…
External Forces that change the Earth
4th grade Earth Science Part 2
The Rock Cycle.
Changes to Earth’s Surface Chapter 9
Erosion What are the agents of erosion? Erosion acts through weathering, the force of gravity, and through the movement of streams, groundwater, glaciers,
Physical Weathering How does physical weathering affect rocks?
10.4 Water’s Effect on Shaping Earth’s Surface
Weathering and Erosion
Weathering and Erosion Unit 4 Study Guide
LANDFORMS Science Standard 5-3
Introduction to Weathering and Erosion
Why does Earth’s surface change?
Sedimentary rocks Thursday, 15 November 2018 Learning objectives;
Weathering The process in which rocks are FIRST broken down by chemical and/or physical mechanisms into smaller particles. There are three types of weathering:
Weathering, Erosion, & Deposition
Weathering and Erosion
KS3 Chemistry 8G Rocks and Weathering.
Weathering and Erosion
Changes to the Earth's Surface
Ch. 3 Sec. 1 EROSION by GRAVITY!
SC.4.E.6.4 Weathering and Erosion
Breaking Down Building Up Picture This! Vocabulary What Happens Next?
Weathering, Erosion, and Deposition
Constructive and Destructive Forces that effect Earth’s Landforms
Incremental Changes Wind, Water, Ice.
Earth and Space Science
Erosion and Weathering
Chapter 4, Section 1 Landforms (part 2)
Weathering and Erosion
Aim: How can we identify the forces that break down rocks?
Weathering D. Crowley, 2008.
Weathering & Erosion.
The Rock Cycle.
Weathering.
Weathering, Erosion, Deposition Intro Notes
Rocks and Weathering.
Forces That Shape Earth’s Surface
Slow Changes to the Earth’s Surface
Presentation transcript:

What changes the scenery?

The world is always changing The plates are on the move New rocks form when volcanic matter reaches the surface The plates push up layers of sediments to form new mountain ranges Mountains become smaller as they are worn away Loose material slithers down slopes under gravity or is moved away by other forces. It is squashed and heated and changes chemically to form new rocks – like diamonds and metals.

But what processes change what we can see? These processes remove rock from mountains There are those that carrying them from one place to another And when they cannot carry them any further, they drop them. Then there are processes that turn these bits and pieces into new rocks by piling them up and squashing them.

We are going to look at 4 processes today 2 that removes pieces 1 that moves I that drops Now one the removing processes is right on its own But the other 3 all formed part of a whole. So first of all lets look at the one on its own.

It is called weathering Which makes you think that it is all to do with weather, which it was when they started looking at this process, but later they found it was not JUST weather that make the effects, but they went on calling it weathering anyway, just ‘cos! There are 3 types of weathering: Lets look briefly at the first 2 as we will not need them again when we look at glaciers and the Ice Age Chemical weathering Biological weathering This one however we will meet again: Physical weathering

This is a brilliant example of biological weathering In the picture, you see a rock that was obviously one piece – it probably have had a bit of a crack - but before the seed fell into the crack and started to grow, that was all it was. As the tree grew, it was strong enough to force the 2 parts of the rock apart!

There several types of chemical weathering The acid in acid rain is quite strong enough to do this So instead of one big hard solid lump of granite, you have pile of small pieces which will fall down and become smaller and smaller eventually to make soil But they all depend on similar processes. In this case, acid rain is the major player. This is granite, a very hard rock made from magma But is has weaknesses in made of minerals that will dissolve away if attacked by acid.

The last type of weathering – physical weathering – which the most weather-like of all Freeze-thaw is one version – one we will talk again about next week, In this, water creeps into a crack During the night it freezes – and ice is very strong AND it takes up more space than water so it pushes sway at the rock. Next day, the ice melts and occupies the new bigger space left by the ice The next night that water freezes and …. Until you see what happens in the end!

I just said ice takes up more space that water I hoped if I said it quickly enough, no-one would notice! But actually, this picture explains how I know what I said was true! Anyone care to explain?

Besides weathering, there are other processes at work Erosion Transport Deposition What do you think these words mean? [the pictures give hints] We are going to skate quickly through a number of different ways these can be achieved, with the help of a number of forces, not just ice, as you will need to have an awareness of them next year.

What is erosion? Erosion is the way in which rock is worn away by something else There 3 things that can do this. They are called agents of erosion – without them no erosion would take place. I am sure in science you have come across forces? Can you think of any natural forces that could wear away and break off rock?

Is fairly obvious that the bank has been eroded – by what do you think?

This rock has also been eroded – by what this time?

What is going on here?

Finally, one you might see again! What could have given that mountain peak its peculiar shape – there is a hint in the picture!

So we have a group of ideas about erosion A river can do it, The air can The sea can And so can ice But this is 4 and I said there were 3 agents of erosion So question number 1 – which 2 of the 4 are the same in some way? But how could bucket of water or snow, or a balloonful of air have a force? When they have a force they would all have to be m…..?

OK, erosion wears away pieces of rock – so what next? If that is all there was too it, you would have large pieces of rock surrounded by lots of fragments – but that would not really change the scenery very much, so what do you think happens then? Think back to our 3 little men on slide 10.

What is happening here?

What is happening here? Why is it like that? Another one? What is happening here? Why is it like that?

This is a long river of ice – what is it called? Can you see anything apart from ice in in it? Remember ice can erode – so what do you think is happening here?

You can probably work out what has happened here?

So now we have the agents moving the eroded material Do you think that once the water or the wind or ice is carrying along the eroded material that it will do so for ever? Back to slide 10 – what happens next?

How did all those pebbles get, where it says HERE?

This may look like a painting – but its not – it is a photograph How did it get there?

How did the sand and pebbles get there?

How did these rocks get here? This is a glacier

In summary What are the 2 processes that remove parts of the scenery – E and W? What is the process that moves the loose material from one place to another? What are the 3 agents of E and T? The agents are all F, so that only when they have enough E can the break off pieces and move them. If the agents run out of energy, then they D the load they are carrying.

What process do each of these pictures show and what is the agent?

What process do each of these pictures show and what is the agent?

What process do each of these pictures show and what is the agent?

So we have looked in general at the processes that change scenery Also the agents that help bring it about Armed with this, we can look at the impact of one agent, ice on scenery next week. What does it do and how does it do it? In the meanwhile to give you a bit of a flavour of what is to come, I want you to look at a little puzzle.

Homework http://www.sln.org.uk/geography/flash/cannock01.swf Or it is on the wiki It is a bit of a pain to get into – just keep pressing next I would suggest you go through it all first before you decide what to write down.