The Earth and the Atmosphere

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  • The earth + the atmosphere
    • The Earth's structure
      • Crust - Mantle - Core
        • Tectonic Plates
          • Made from crust + upper mantle
            • If plates move quickly - Earthquake
              • Volcanos and earthquakes often happen when two tectonic plates meet.
        • Iron + Nickel
    • Rocks
      • Igneous
        • Formed from magma.
      • Sedimentary
        • Layers of sediment laid down in lakes or seas for millions of years.
          • Cemented together by other minerals.
            • Fossils can form in the sediments. (remains of plants or animals).
              • The type of fossil is used to work out the relative age of the rock.
                • Limestone, Chalk, Sandstone.
        • Water evaporates leaving dissolved sold (like salt) behind.
      • Metamorphic
        • Result of increased heat or pressure
          • Marble, Schist, Slate.
      • Elements -Compound  -  Minerals - Rocks.
    • The Rock Cycle
      • Weathering
        • Erosion
          • Transport-ation
            • Deposition
              • Burial / Compression
                • Heat / Presure
                  • Melting
                    • Cooling
                      • Exposure
    • Climate
      • The level of carbon dioxide is increasing.
        • Burning fossil fuels  to power cars and to make electricity in power stations
          • The level of greenhouse gases are increasing, making the Earth to gradually get hotter and hotter.
            • Global Warming
        • Deforestation means less carbon dioxide is removed form the atmosphere by photosynthes-is.

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