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PLATES AND CONTINENTAL RIDGES
Continental Drift
It is the theory that 200 million years ago
there was a single continent called Pangea on
the Earth

The Earth, s rotation caused this landmass to
move and break up. The huge pieces of rock
produced are tectonic plates. They are like
massive pieces of a jigsaw puzzle.
Plates and continental ridges
These tectonic plates move extremely
                slowly

• When two plates collide,     • The places where plates
  one can rise and form a        meet are very unstable
  mountain range. The other      areas that can produce
  can sink under the ocean       volcanoes and earthquakes.
  and form an oceanic trench
QUIZ


1. What is the theory of continental drift?



1. What happens when tectonics plates collide?
SOLUTIONS

1.Continental drift is the theory that 200 years
  ago there was a single continent on Earth:
  Pangea
2.In the case of two plates colliding, one may
  rise up and form a mountain range, while the
  other may sink to form an oceanic trench.
ACTIVITIES
                MAP P.27
1. Where are the most unstable places in the
   world? Where are the more stable places?

2. Which areas of Spain are the most unstable?
SOLUTIONS
1. The most unstable areas of the Earth are
   those which coincide with the points where
   tectonic plates are in contact. The most
   stable are those found in the middle of
   tectonic plates, far from their edges.
2. Andalusia and Catalonia are the most
   geographically unstable regions of Spain.
   Both, particularly Andalusia are close to the
   point where the African and Eurasian plates
   meet.
ACTIVITY 3
                 PAGE 27
a) The Earth´s structure consists of three large
   sections: the core, the mantle and the crust
b) The mantle is 84% of the Earth´s total volume
c) The Earth´s crust is between 10 and 70
   kilometers thick.
d) Mount Everest is the highest point in the
   world at 8848 metres

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Plates and continental ridges

  • 2. Continental Drift It is the theory that 200 million years ago there was a single continent called Pangea on the Earth The Earth, s rotation caused this landmass to move and break up. The huge pieces of rock produced are tectonic plates. They are like massive pieces of a jigsaw puzzle.
  • 4. These tectonic plates move extremely slowly • When two plates collide, • The places where plates one can rise and form a meet are very unstable mountain range. The other areas that can produce can sink under the ocean volcanoes and earthquakes. and form an oceanic trench
  • 5. QUIZ 1. What is the theory of continental drift? 1. What happens when tectonics plates collide?
  • 6. SOLUTIONS 1.Continental drift is the theory that 200 years ago there was a single continent on Earth: Pangea 2.In the case of two plates colliding, one may rise up and form a mountain range, while the other may sink to form an oceanic trench.
  • 7. ACTIVITIES MAP P.27 1. Where are the most unstable places in the world? Where are the more stable places? 2. Which areas of Spain are the most unstable?
  • 8. SOLUTIONS 1. The most unstable areas of the Earth are those which coincide with the points where tectonic plates are in contact. The most stable are those found in the middle of tectonic plates, far from their edges. 2. Andalusia and Catalonia are the most geographically unstable regions of Spain. Both, particularly Andalusia are close to the point where the African and Eurasian plates meet.
  • 9. ACTIVITY 3 PAGE 27 a) The Earth´s structure consists of three large sections: the core, the mantle and the crust b) The mantle is 84% of the Earth´s total volume c) The Earth´s crust is between 10 and 70 kilometers thick. d) Mount Everest is the highest point in the world at 8848 metres