Mar 21, 2016
Welcome to your firstfirst GCSE lesson in Geography!
Please sit down quietly.
On to the post-it note please write down…
1. Your name2. Any question you have about your GCSE course
in Geography
On my post-it note…Name:Miss Ainslie
Question:What would you like
to do more of in
Geography?
On your second post stick note write down what you would like to do more of in Geography...
Doing group work.
Going on fieldtrips
Using computers to
do work.
Making and creating
posters or leaflets
Doing roll plays and
using drama.
Watching DVD clips.
Please stick your post stick notes together so I can collect them in.
I will read these and answer all your questions next lesson!
What skills will I be What skills will I be developing?developing?
• Decision-making skills, thinking about how coastlines should be managed
• Independent enquiry skills, asking your own questions and finding out the answers
• Communication skills, backing up your ideas with well explained arguments
You will also need to understand and consider the views of different people and stakeholders
Put the title: The Coastal ZoneNow make two lists in your book using the photo below. Try to think of at least
3 for each column.Human features Physical Features
Learning Focus: What are waves and Learning Focus: What are waves and how do they work?how do they work?
• What: Identify the two main types of wave and learn the key terms
• How: Label diagrams and compare constructive and destructive waves
• Why: To begin to understand the importance of waves and the coastal zone
Who is affected by waves? How?
• Property Owners• Fishermen• Surfers
Add at least 2 more of your own…
The action of waves
Waves are created by wind blowing over
the surface of the sea
Friction is created - producing a swell in
the water
The water particles then rotate and the
wave moves forward
Wave length
CrestWave height
Seabed
Trough
Swash
Backwash
• Wave Frequency
• Velocity
• Fetch
Wind
Types of waves• When a wave breaks,
water is washed up the beach - called swash
• Then the water runs back down the beach - called backwash
http://www.youtube.com/watch?v=tN42EWWTP3w
Backwash
Swash
Note: Backwash is always at right angles to the beach
Whenever you see either one on the video, shout
‘SWASH’ or ‘BACKWASH’!
Waves can be constructive or destructive
• With a constructive wave, the swash is stronger than the backwash
• With a destructive wave, the backwash is stronger than the swash.
Destructive Waves
Constructive Waves
backwash>swash
swash>backwash
Constructive Waves
• Created in calm weather
• Break on the shore and deposit material, building up beaches
Destructive Waves
• Created in storm conditions when the wind is powerful and has been blowing for a long time
• Occur when wave energy is high and the wave has travelled over a long fetch, tend to erode the coast
Constructive or Destructive?
Check your
answers
Demonstrate: Decide whether the statements are talking about
destructive or constructive waves and add them to the correct diagram
• The swash is stronger than the backwash• The backwash is stronger than the swash• Short wave height• Tall wave height• Strong swash causes a lot of material to be
deposited on the beach• Strong backwash pulls sand and shingle back
to the sea eroding the beach
Dorset Fieldtrip!• 14th September 2012• £10 each• Leave school 7:30am (arrive by
7:15am)• Arrive back by 6pm• All details on the letter sent
home• Bring money and forms back
into school a.s.a.p.
Coastal Bingo
• Write down 4 key words from those you have learnt today
• If I say one you have written, cross it off and put your hand up to give its definition
• The first one to get all 4 words crossed off is the winner!
Constructive Destructive Swash Backwash Fetch
Frequency Wave Height Wave Length
Crest Trough Wave Frequency Velocity