We use the coast in many ways.We use the coast in many ways.

How could some of How could some of these uses conflict with these uses conflict with tourism?tourism?

Use your earlier homework task to Use your earlier homework task to help you here.help you here.

Would Tourists want to

see this?

Why not?

Conflict at the CoastConflict at the Coast

Tourist and visitors would not want Tourist and visitors would not want ________ at the coast,________ at the coast,

Because ____________________Because ____________________ ____________________________.____________________________.

Today’s ObjectivesToday’s Objectives

Investigate:Investigate: What is changing the coastWhat is changing the coast

To identify some of the main erosion To identify some of the main erosion processes.processes.

Explain the jobs that waves do.Explain the jobs that waves do.

Explain how the waves erode the coastExplain how the waves erode the coast

Our Coast is always Our Coast is always changing.changing.

Why?Why?

It’s to do with the sea.It’s to do with the sea.

It is all about the Waves.It is all about the Waves.

What are waves? How are they What are waves? How are they created what do they do?created what do they do?

http://www.bbc.co.uk/education/http://www.bbc.co.uk/education/clips/zk23cdmclips/zk23cdm

The Coast is always changing.

Let’s have a look at examples in the West of Wales and the East of England.

http://www.bbc.co.uk/learningzone/clips/coastlines-drastic-erosion/8434.html

http://www.bbc.co.uk/education/clips/zx6g9j6

The Power of the wavesThe Power of the waves

Waves are changing the coast every Waves are changing the coast every day, they do this by following a day, they do this by following a master planmaster plan

Erode

Transport

DepositRecord this flow diagram!Record this flow diagram!

Title: Title: Waves at WorkWaves at Work

Title: Waves at WorkTitle: Waves at Work

Transport

Deposit

Record these keywords as a flow diagram Record these keywords as a flow diagram (3 mins)(3 mins)

Erode

What do waves do? KeywordsWhat do waves do? Keywords

Waves Waves erodeerode (wear down) the coast. (wear down) the coast. Waves Waves transporttransport (move) the eroded (move) the eroded

material.material. Waves Waves depositdeposit (drop) this material (drop) this material

in sheltered areas where they lose in sheltered areas where they lose their energy.their energy.

Waves at workWrite down the missing keywords to describe the 3 jobs that waves do..

Waves _____ ______ (erode) the coast. This is called E_________.

Waves ________ (move) the eroded material.

Waves ______ (drop) this material in _______ areas where they lose their e_____.

Wear away Deposit Erosion Sheltered Transport Energy

ErosionErosion

http://www.bbc.co.uk/education/clips/http://www.bbc.co.uk/education/clips/zdxg9j6zdxg9j6

This clip introduces 3 of the ways waves This clip introduces 3 of the ways waves erode (wear down) the coast.erode (wear down) the coast.

There are in total 4 erosion processes. There are in total 4 erosion processes. Let’s learn more…Let’s learn more…

There are 4 types of Erosion By WavesThere are 4 types of Erosion By Waves

erosion

Hydraulic action solution

Abrasionattrition

How do these types of erosion work?

Waves smash against the rock, breaking the rock up over time.Waves smash against the rock, breaking the rock up over time.

Hydraulic ActionHydraulic Action

Waves force water into cracks under Waves force water into cracks under pressure. This helps break up the pressure. This helps break up the rock.rock.

SolutionSolution

Water dissolves soluble material Water dissolves soluble material from the rock.from the rock.

AbrasionAbrasion

Waves fling sand,pebbles and large Waves fling sand,pebbles and large stones against the rock. This acts as stones against the rock. This acts as sand paper wearing away the rock.sand paper wearing away the rock.

AttritionAttrition

Waves knock together the pieces of Waves knock together the pieces of rock broken off by erosion. These rock broken off by erosion. These wear down into smaller and smaller wear down into smaller and smaller pieces. pieces.

The rock wears down into The rock wears down into shingle shingle (Pebbles) (Pebbles) and and sand.sand.

Use Page 8 of Geog 2 to find the Use Page 8 of Geog 2 to find the meanings of these key words.meanings of these key words.

Hydraulic Action is…?Hydraulic Action is…? Abrasion is…?Abrasion is…? Attrition is…?Attrition is…? Solution is…?Solution is…?

Title: Title: Waves at WorkWaves at WorkWrite down the definitions of these key Write down the definitions of these key

words in your bookswords in your books

Wave

Erosion

Hydraulic action Solution

AbrasionAttrition

Waves smash against the rock, breaking the rock up over time.

Waves ________ water into cracks under _________. This helps break up

the rock.

Water _________ soluble material from the rock.

Waves _______ sand, p________ and large stones

against the rock. This acts as ________

_________ wearing away the rock.

________ _________ together the pieces of rock broken off by

e__________. These wear down into smaller and smaller pieces.

The rock wears down into ________ (Pebbles) and sand.

Waves Sand paper Force Dissolves Fling Shingle Erosion Pebbles Knock Pressure

The waves don’t have all the The waves don’t have all the power!power!

Erosion of the cliffs also occur from Erosion of the cliffs also occur from weatheringweathering

What are the different types of What are the different types of weathering ?weathering ?

Water trickles into cracks.In icy weather it freezes, forcing the cracks wider until the rock breaks up.

In hot places, Like deserts, the rock heats up during the day and expands. At night it cools and contracts this weakens the rock. The outer layers of he rock break up- rather like an onion skin.

Plant and tree roots grow in cracks and widen them, causing the rock to break up

Remember Science?

Water reacts with Carbon dioxide in the air. The water becomes slightly acidic. (Carbonic acid). This dissolves the rock.

Water trickles into cracks.In icy weather it freezes, forcing the cracks wider until the rock breaks up.

Plant and tree roots grow in cracks and widen them, causing the rock to break up

In hot places, Like deserts, the rock heats up during the day and expands. At night it cools and contracts this weakens the rock. The outer layers of the rock break up- rather like an onion skin.

Water reacts with Carbon dioxide in the air. The water becomes slightly acidic. (Carbonic acid). This dissolves the rock.

Copy these down into your books!

_______ trickles into _______. In icy weather it ______, forcing the cracks _______ until the rock breaks up.

Plant and _____ roots g_____ in cracks and widen them, causing the _____ to _______ up

In hot places, Like deserts, the rock ______ up during the day and e________. At night it c_____ and c_________. This

weakens the rock. The outer l______ of the rock break up- rather like an onion skin.

Water reacts with _________ __________in the air. The water becomes slightly _________. (Carbonic acid). This

__________the rock.

WEATHERINGUse the keywords to complete these definitions

Cracks Grow Freezes Water Wider Break Layers Acidic Rock Expands Carbon Dioxide Dissolves Tree Heats Cools Contracts

_______ trickles into _______. In icy weather it ______, forcing the cracks _______ until the rock breaks up.

Plant and _____ roots g_____ in cracks and widen them, causing the _____ to _______ up

In hot places, Like deserts, the rock ______ up during the day and e________. At night it c_____ and c_________. This weakens the rock. The outer l______ of the rock break up- rather like an onion skin.

Water reacts with _________ __________in the air. The water becomes slightly _________. (Carbonic acid). This __________the rock.

WEATHERING Use the keywords to complete these definitions

Cracks Grow Freezes Water Wider Break Layers Acidic Rock Expands Carbon Dioxide Dissolves Tree Heats Cools Contracts

Cracks Grow Freezes Water Wider Break Layers Acidic Rock Expands Carbon Dioxide Dissolves Tree Heats Cools Contracts

Using what we have found out Using what we have found out this lesson….this lesson….

Complete the worksheet 1b Complete the worksheet 1b “Wearing the coast away” Q “Wearing the coast away” Q 1 and 21 and 2

Put your name on the sheet.Put your name on the sheet.