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2
|
Process for producing ammonia from nitrogen and hydrogen
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4
|
A negatively charged electrode
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5
|
A type of rock formed by high heat and pressure
|
6
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The crust and top part of the mantle
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7
|
A positively charged electrode
|
8
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In the mantle causes the plates to move
|
10
|
Used to make fertilisers
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11
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The theory of Alfred Wegner
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12
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A type of rock that is formed by the deposition of material
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14
|
Solution used to purify copper
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