The document outlines the topics and objectives for a lesson on coastal landforms and processes. It includes sections on agents shaping coasts like waves, tides, and currents; coastal processes; coastal landforms; coastal protection measures; and diagrams and videos illustrating concepts. The lesson will describe factors affecting wave energy, types of wave movement including swash and backwash, and different types of constructive and destructive waves.
2. The big picture- text pg 207
LESSON TOPICS
1 AGENTS SHAPING COASTS
2 COASTAL PROCESSES
3 COASTAL LANDFORMS
4
WELL LABELLED
DIAGRAMS
5
COASTAL PROTECTION
MEASURES
6 LEVEL DESCRIPTORS,
2
3. Wave
Waves
energy
Wave
movement
Coasts
are Tides Wave types
shaped
by ...
Currents
3
4. Today's objective
• Describe the factors affecting
wave energy and the types
of wave movement
• Describe and account for the
different types of waves
4
5. Q: What is a coast vs a shore?
Coas
t
Sho
r
e 5
6. Waves
• Wind energy on the
water surface
• Water particles on
top moves, but
below doesn't
• Creates circular
motion
• Seawater rises and
drops
6
7. Wave
Waves
energy
Suggest factors that determines
the different size of the 2 waves?
7
8. Text pg
Waves Wave energy 186
Wind
duration Fetch
Wind speed
8
9. Wave
movement Swash / backwash
Watch the
video and
decide which
is a swash
and a
backwash?
9
10. Wave
movement Refer to the vide
and text pg 187,
Elab orat e on the
diffe renc es betw een
swa sh and back was h
[3]
10
11. Wave movement
Swash Backwash
Forward
Formation movement of Pull of gravity
waves
Direction Up shore Back to sea
Sediments Deposit Erosion
11
12. Constructive or
Wave types
Destructive waves?
Small waves
grinding the
rocky shore of
the Bengtskar
island
12
13. How to deter mine the types of
waves?height and
• Wave Text pg
188
length
• Wave frequency
• Breakers
• Swash and backwash
• Gradient of slope
• Open or sheltered
coast
• Deposition or erosion
13
16. Activity- pair work:O level Geog Elect N2010 P2
Use information from Fig. 8 to explain
why some waves are described as
constructive, whilst others are
described as destructive.
16
17. Use information from Fig. 8 to explain why some
waves are described as constructive, whilst others
are described as destructive.
Constructivewaves
waves Destructive waves
• Low energy
• High energy waves
(small)
(large)
• Swash stronger than
• BW is stronger
backwash as BW is weak
because energy is used than swash due to
to overcome friction with strong winds
gentle seabed
• Strong BW
• Deposition of sediments removes the
occurs as BW is too eroded materials
weak to carry load back into the sea
to sea
17
18. Coasts are shaped by ...
Text pg
Tides 189
• Daily alternate rising and
falling of the sea level
• Cause by gravitational pull of
the moon
• Each coastal area receive two
high tides and two low tides
daily
• During high tide, waves tend
to erode more than deposit
18
19. Coasts are shaped by ...
Text pg
Currents 189
• Large scale
movement of water
in the ocean driven
by wind
• Longshore current:
flow parallel to a
coast ( form by
waves approaching
at an oblique angle)
19
21. 5 (a) (i) State the differences
between
destructive and
constructive
waves. [3]
(ii) Explain how constructive
waves
may form beaches. [3]
21
Editor's Notes
Good noise ( response) Ask questions
Write on whiteboard
Wind speed: greater velocity results in greater energy Duration: time taken to generates the waves Fetch: distance or length of the sea( greater fetch greater wave energy)
