P1 | Mind Map

Milky Way Galaxy
1. Solar System
  1. Stuff In Space
    1. Asteroids
    2. Comets
    3. Planets, Dwarf Planets and Moons
      1. Mercury
        Venus
        Earth
        Mars
        Jupiter
        Saturn
        Uranus
        Neptune
        Pluto
  2. Earth
    1. 5000 Million Years old
    2. Sun
      1. 5000 Million Years old
      2. Universe
        14000 Million Years old
Speed Of Light
1. 300,000 km/s
Parallax Method
1. Astromeners take pictures 6 months apart
  1. Apparent movement of a star between the two photos, lets you work out how far away it is
    1. Stars further away move less than stars closer to earth
2. Red Shift
  1. When a galaxy is moving away from us, the wavelength of the light changes - The light becomes redder
The Earth is an active place
1. Rocks provide a record of change in the Earth
2. Rocks are constantly being recycled
Wegner's Theory Of Continental Drift
1. Theory
  1. That all continents were once together as one and they have all drifted apart
  2. Evidence
    1. The continents look like they fit together like a puzzle
    2. Matching rock layers in South America and Africa
    3. Similar fossils in South America and Africa
    4. Wasn't accepted at first. Why?
      1. Erosion Theory was just accepted
      2. Wasn't detectable
      3. Couldn't be recreated in a lab
      4. Wegner was a meteorologist not a geologist
      5. BUT THEN ...
        In the 1950s, scientists investigated the Mid-Atlantic ridge
        The found that magma rose up through the sea floor. This magma cools and create underwater mountains
        The evidence suggested that the sea floor was spreading and the continents were moving apart

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	Created by Matthew Jones over 11 years ago