| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
| T |
Alfred Wegener observed
- Matched coastlines of Africa and S.America,
- Matched rock formations,
- Common fossils. |
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What 3 forms of evidence did Alfred Wegener base his theory of crustal movement on? |
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| W |
This could be explained if the continents drifted apart. |
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What was Alfred Wegener's explanation for the forms of evidence? |
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Alfred Wegener theory of crustal movement (continental drift) was not generally accepted for many years because he couldn't explain how it could happen.
We now believe... |
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Why was Alfred Wegener's theory of continental drift not generally accepted? |
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| W |
Convection currents within the Earth's mantle cause the plates. |
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What moves the tectonic plates? Demo convection current in flat tray with paper continents floating on water.
modelling diffusion using potassium permanganate in water could be a different temperatures for rates |
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| T |
The heat energy drives convection currents in the mantle, through the changing density (particle movement) of the heated mantle. |
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Where does the energy come from to cause the movement of the tectonic plates? |
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| T |
The heat in the core is released by natural radioactive processes. |
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What creates the heat in the core? |
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| W |
Nuclear energy is transformed into heat energy. |
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What is the energy transform occurring in the core? |
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| W |
The plates move at relative speeds of a few centimetres per year. |
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How fast do the plates move on average? This fence was put up 50 years ago:
http://static.flickr.com/134/355247789_c290ad8e7d.jpg
Do tectonic plates move at metres, centimetres or millimetre a year? |
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| W |
The movements can be sudden and disastrous. Earthquakes and / or volcanic eruptions occur at the boundaries between tectonic plates. |
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What do the sudden movements of the tectonic plates cause? Modelling earthquakes demo heating the Bunsen burner |
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