Year 9 Restless Earth Earthquakes and Plate Tectonics Revision PowerPoint.
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Transcript of restless earth,3
How many faces do you see?
Seating plan…
My Desk
The d
oor
Rules and Expectations
• 1. Respect each other, the teacher and the
room
• 2. Listen when other people are speaking.
• 3. Do not speak when the teacher is
addressing the class.
• 4. Do not graffiti your books or text books
• 5. And most importantly, try your best and you
will succeed
Connect: Recap Quiz!
Last term you started your first GCSE
module:
The Restless Earth
You have 5 minutes to complete the recap
quiz to see how much you remember!
04 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Time Left …
Back to Clock Home
Swap your quiz with your partner to
check your answers…(max 14 marks!)
1. Crust, Mantle, Inner Core, Outer Core (1 mark for each)
2. Solid
3. A Peach
4. Pangaea (1 mark for identification, 1 extra mark for correct spelling!)
5. Oceanic and Continental (1 mark for each)
6. Oceanic crust is more dense.
7. The boundary on which the earths crust is split up
8. The current within the earths mantle (1 mark) which causes the earth’s plates to move (1 mark)
Big Picture: What landforms are
found at different plate boundaries?
Know what is a fold mountain and an ocean
trench.
Be able to describe and explain the main
characteristics of these features.
Create a representation of these features.
Activate: There are 3 main types
of plate margins.
Read the description and match
it up to the diagram you think
best illustrates the plate
movement.
Extension: Use the information to write
definitions for the key terms.
Collision Plate Margin
When continental plates meet continental plates neither can subduct the other
because they both have the same density. The plates are being forced together
at great pressure so the rocks crumble together and form massive mountain
chains like the Himalayas. The Himalayas are still growing today as the plates
continue to be pushed together at about 1 or 2cm a year!
The Himalayas are an example of fold mountains, where the rocks are
colliding and folding together to form mountains. The Earth’s crust is thickest at
this point (70km thick)
Demonstrate:
1. Use the information about Fold Mountains to create
a representation of how they form using the play dough.
2. Use your representation as a visual tool to help you
label your diagram:
Include the following labels:
-Fold Mountains
-Collision plate margin
-Mountain range
-Continental crust
-Oceanic crust-Subduction
-Collision (pushed together)
-Same density
Oceanic crust is denser (heavier) than continental crust so the continental crust
forces the oceanic crust underneath it. This is a process called subduction.
At the subduction zone a deep sea trench is formed where the plate is being
forced downwards under the continental plate. When the oceanic crust begins
to melt as it goes down into the hot mantle it starts to float back up, because it
is made up of lighter material than the mantle. This means that the magma
erupts back to the surface creating volcanoes.
Destructive Plate Margin
Demonstrate: 1. Use the information about Fold Mountains to
create a representation of how they form using
the play dough.
2. Use your representation as a visual tool to help
you annotate your diagram:
Include the following labels:
-Ocean Trench
-Destructive plate margin
-Oceanic Crust
-Continental Plate
-Subduction Zone
-Collision (pushed together)
-Denser crust (heavier crust)
World Map of Fold Mountains and
Ocean Trenches
1. How are fold mountains formed? Collision boundary – two continental plates
crashing into each other forces material between them to compact into mountains
2. Give an example of a range of fold mountains
Himalayas – South Asia 3. On what type of plate boundary do ocean
trenches occur? Destructive (subduction) – oceanic and continental
crusts crash into each other, and oceanic (densest/heaviest) sinks, leaving deep ocean trench
Reflect: What have we learned?