Geography  Yr7 revision

  • Created by: ams9
  • Created on: 17-05-18 16:50
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  • Geography  Yr7
    • Weather
      • Definitions
        • Weather is the effect of the atmosphere at a particular place and time, regarding heat, rain, dryness and cloudiness.
        • Climate is the description of the long-term pattern of weather in a particular area.
        • Microclimate is the climate of a small area, which can be different to the general area.
      • How we measure weather
        • Campbell-Stokes sunshine recorder
          • This has a glass ball that focuses the sunrays onto a piece of paper. You then measure the length of the burn against the hourly markings.
        • Barometer
          • This measures air pressure by recording the force of air exerted on it.
        • Anemometer
          • This measures wind speed. Cups are pushed around the pole by the wind, the stronger the wind the faster they spin.
    • USA
      • The Grand Canyon
        • The Grand Canyon was formed 5.6milion years ago when the Colorado River wore down the layers of rock, making a big hole.
        • Impacts of tourism
          • The biggest positive impact of tourism because of the Grand Canyon is that 9,800 jobs have been provided. This is good because it provides the locals with more money.
          • The biggest negative is that many tribes have been forced to move from their sacred land, this is bad because they have lived there for a long time.
    • Tectonics
      • Plate boundaries
        • Constructive plate boundaries. When 2 plates move away from each other. Makes volcanoes, new land, and ridges.
        • Collision plate boundary. When two continental plates meet they both rise, making mountains.
        • Conservative plate boundaries.When two plates slide past each other. Makes massive earthquakes.
        • Destructive plate boundaries. When the oceanic plate goes under the continental plate. Makes earthquakes, destructive volcanoes, and ocean trenches.
      • Structure of the earth
        • Crust
          • This is the outside layer. There are 2 types of crust-continental (older) and oceanic (thinner). they are mainly made of Basaltic and Granitic, it is solid rock. It ranges from 10-30 miles thick. the temperatures range from -50-50*C.
        • Mantle
          • This is the second layer of the earth and the thickest, consisting of 1800 miles of semi-molten rock. the average temperature is 3000*C. It is 2/3 of the earths mass.
        • Outer Core
          • This is the 3rd layer and is roughly 1400 miles thick. It is made up of liquid molten magna, which is mostly iron and nickel. It is probably 5000*C
        • Inner Core
          • This is last layer of the earth. It is 900miles thick and 5500*C. It is a solid ball of iron and nickel. It is placed under immense pressure.
    • Map Skills
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