C1 PART 2 - earth

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C1P2/28.Name the structure of the Earth
Inner core,Outer core,Mantle,Crust
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C1P2/29.Describe the structure of the Earth
Crust-Is rocky & thin. Mantle-Has solid properties but can flow very slowly. Core-Made of iron & nickel
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C1P2/230.What was the name of Wegner's theory?
Continental Drift/movement
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C1P2/31.Name reasons as to how Wegner explained his continental drift theory
-Shapes of Africa & S.America look as if they might once have fitted together.-Fossils of the same plants had been found in both Africa & S.America-The two continents have the same rock types at the edges where they might have been joined
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C1P2/32.Describe the theory of Plate Tectonics
-The plates are less dense than the mantle below, so they rest on top of it. Convection currents deep within the solid mantle carry the plates along.The convection currents are driven by heat from radioactive processes happening deep inside the Earth
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C1P2/33.What is the primordial soup theory
Theory that life on earth originated when molecules in the atmosphere reacted together in the presence of sunlight
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C1P2/34.What causes the Tectonic Plates to move?
Convection Currents in the mantle
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C1P2/35.How can volcanoes erupt?
If an earthquake is nearby-the shape of the volcano changes-the volcano can give off more gases than usual
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C1P2/36.How can Earthquakes occur?
Tectonics plates move past each other in opposite directions but because of friction the plates can't slide smoothly.Huge forces build up as they keep trying to pass each other. Eventually the 2 plates overcome the frictional forces.They slip suddenl
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C1P2/37.Name the different gases and their percentages in the earth's atomsphere
Nitrogen[78%],O2[21%],CO2[0.038%],Argon[0.9%]
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C1P2/38.Describe the volcanic activity in the first bill years
During the first bill years of the Earth's existence there was intense volcanic activity. This activity released the gases that formed the early atom. & water vapour that condensed to form the ocean
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C1P2/39.Describe of the theories of how the Earth was formed
One theory suggests that during this period the Earth's atmosphere was mainly Carbon dioxide and there would have been little or no oxygen. There may also have been water vapour and small proportions of methane and ammonia. Plants & Algae produced th
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Card 2

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C1P2/29.Describe the structure of the Earth

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Crust-Is rocky & thin. Mantle-Has solid properties but can flow very slowly. Core-Made of iron & nickel

Card 3

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C1P2/230.What was the name of Wegner's theory?

Back

Preview of the front of card 3

Card 4

Front

C1P2/31.Name reasons as to how Wegner explained his continental drift theory

Back

Preview of the front of card 4

Card 5

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C1P2/32.Describe the theory of Plate Tectonics

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