Download Task to i) Explain how continental drift works to move tectonic plates

Task to
i)
Explain how continental drift works to move tectonic plates over time.
ii)
Explain 3 pieces of Wegener’s evidence for continental drift.
iii)
Explain new evidence of continental drift
Key Words:
Tectonic plates
fossils
evidence
Continental drift
peer review
volcanoes
Pangaea
Earthquakes
1. In the 1800’s how did geologists explain how mountains had formed? _______________
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2. Name the meteorologist who came up with the theory of continental drift. __________
3. Which 3 pieces of evidence did he give for his theory.
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4. Why didn’t other scientists believe him? ___________________________________
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Sketch a Diagram of
Sea Floor spreading.
Explain how sea floor spreading
happens:_________________
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Plate techtonics
Your Tas:. Draw a picture to explain the bullet points of plate techtonics.
The earth’s structure is the
solid crust on the surface, the
semi solid mantle beneth it,
the liquid outer core and the
solid inner core.
Ocean floor is created when
two tectonic plates are
moving apart, because hot
molten rock rises and creates
a ridge.
This is called seafloor
spreading.
It is made up of dozens of
giant slabs of rock called
tectonic plates
The lower mantle is hot and
soft. It can flow slowly.
Convection Currents in the
mantle carry the plates along.
Ocean floor is destroyed when
one plate moves beneath
another (called subduction).
This can cause volcanoes to be
created.
When tectonic plates collide it
can make fold mountains.
When tectonic plates slide
past each other it can cause
earthquakes.