I made a an interactive PPT on Rivers,coasts and glaciation.Teachers and students simply love this PPT.

1. ncgiatiola
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2. What is this unit about?
 types weathering Different of
 rivers shapes the land materials How
 shapes How the coasts sea
 of coastal erosion problems The
 erosions may be reduced coastal How
 The results from rivers, coastal and glaciation process landforms that

3. What is this unit about?
 Different types of weathering
 How materials are eroded, transported and deposited.
 How rivers shapes the land
 How sea shapes the coasts
 The problems of coastal erosion
 How coastal erosions may be reduced
 The landforms that results from rivers, coastal and glaciation process.

4. Why is learning about rivers and coasts
important ?

5.  Are often attractive
 May be used for recreation purposes
 Provide sites for settlements and industries.

6. Angel falls

7. Grand canyon

8. Weathering

9.  Weathering describes the breaking down or dissolving of
rocks and minerals on the surface of the Earth. Water, ice, acids, salts,
plants, animals, and changes in temperature are all agents of weathering.
Once a rock has been broken down, a process called erosion transports
the bits of rock and mineral.

10. Articulate

11. Freeze thaw weathering
When water
leaks into the
cracks of rocks,
it freezes and
causes the rock
to crack.

13. Onion Skin weathering
When a rock
has heat
exerted upon
it, along with
pressure, it
separates into
layers.

15. Biological Weathering
This occurs when
burrowing
animals, humans,
or plants interfere
and work their
way into rocks.

17. Chemical weathering
 This is
caused by
the action of
acid water.

19. Erosion
 Erosion is the wearing away of rocks and its removal by streams, ice and
wind.
 Erosion, transportation and deposition help shape the land.

20. Agents of Erosion
 There are four main agents of erosion.
 Moving water, wind, gravity, and ice wear away or break up
rocks, sediments, and soil from the land's surface.
 When these materials are deposited or dropped in new places, it is called
deposition.

21. How do rivers shapes the land?

22. Features of a
river and its
valley.

24. What causes waterfalls?

25. What happens
on a river bend?

26.  A meander is one of a series of
regular sinuous curves, bends,
loops, turns, or windings in the
channel of a river, stream, or
other watercourse.
 Floodplain-an area of low-lying
ground adjacent to a river,
formed mainly of river
sediments and subject to
flooding.

27. How does the sea shapes the coast?

28. Spurn Head spit
 Beach is an example of
deposition landforms
 A spit is a special type of beach
extending out into the Sea.

30. What is the coastal erosion problem?
Land is eroded about 2 metres
every year in Holderness in
Yorkshire,England.

31. What is the
coastal erosion
problem?

32. How can coastal erosion be reduced?
 Sea wall
 Beach rebuilding
 Groynes
 Riprap

33.  Beach nourishment
(also referred to
as beachrenourishme
nt, beach replenishme
nt, or sand
replenishment)
describes a process
which sediment,
usually sand, lost
through longshore
drift or erosion is
replaced from other
sources.

34.  A seawall (or sea wall) is a
form of coastal defence
constructed where the sea,
and associated coastal
processes, impact directly
upon the landforms of the
coast. The purpose of a sea
wall is to protect areas of
human habitation,
conservation and leisure
activities from the action of
tides, waves, or tsunamis.

35.  Groynes a low
wall or sturdy
timber barrier
built out into the
sea from a beach
to check erosion
and drifting.

36.  Rip Rap - loose stone used
to form a foundation for a
breakwater or other
structure

37. How does ice shape the land?
 Glaciers are like powerful
 Earth moving machines:
 They dig out rocks(erosion)
 Then they move material
down the valleys(transportation)
Then they dump it in the lowlands
(deposition)

38. Formation of a corrie

39. Formation of arêtes and a pyramidal
peak.

40. Formation
of arêtes
and a
pyramidal
peak

41. What landforms
results from
glaciation?
Cirque-a half-open
steep-sided hollow at
the head of a valley
or on a mountainside,
formed by glacial
erosion.
Col-The lowest point of
a ridge
Horn :a hard
permanent
outgrowth.
A truncated spur is a spur, which is a ridge that
descends towards a valley floor or coastline from a higher
elevation, that ends in an inverted-V face and was
produced by the erosional truncation of the spurby the
action of either streams, waves, or glaciers.

42. Truncated spur
are ridges that
have been
shortened or cut
off by the moving
glacier.

43. Hanging valleys are
similar valleys that
have been eroded
less than the main
valley.

44. Ribbon lakes are
long narrow
lakes that form
in hollows in the
main valley.

45. Ribbon
Lakes

47. Erratics are
boulders
transported
by ice and
deposited
often in an
area of
totality
different
rock.