The crust and the outer mantle are known together as the ....
Lithosphere
1 of 17
The widest section of the earth (2900km thick)
Mantle
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The semi-liquid lower mantle the tectonic plates float on
Asthenosphere
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Oceanic crust is made of....
Sima
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The centre of the Earth
Core
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Created original theory of 'continental drift'
Alfred Wegener
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The original supercontinent
Pangaea
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Evidence of continental drift- jisaw fit of South America and ....
Africa
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Evidence of continental drift- matching .... in northwest Scotland and eastern Canada
Rocks
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Evidence of continental drift- ..... found under Antarctic ice cap
Coal
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Evidence of continental drift- a unique Permian fossil reptile (mesosaurus) only found in Southwest Africa and .....
Brazil
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In the 1950s, when nuclear submarines began to map the ocean floor with accuracy this was discovered, along with similar features, in seismically active regions
Mid-Atlantic Ridge
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1962- this American geologist studied the age of rocks on the Atlantic Ocean floor
Harry Hess
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The concept that the American geologist's evidence led to
Sea-floor spreading
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The study of the history of changes in the Earth's magnetic field-effectively confirmed the American geologist's theory
Palaeomagnetism
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The pattern of rock polarity on either side of the Mid-Atlantic Ridge is...
symmetrical
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Tectonic plates move due to ..... in the mantle
Convection currents
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Other cards in this set
Card 2
Front
The widest section of the earth (2900km thick)
Back
Mantle
Card 3
Front
The semi-liquid lower mantle the tectonic plates float on
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