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183273
P1
Description
Physics (P1) Mind Map on P1, created by Matthew Jones on 08/30/2013.
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p1
physics
physics
p1
Mind Map by
Matthew Jones
, updated more than 1 year ago
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Created by
Matthew Jones
over 11 years ago
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Resource summary
P1
Milky Way Galaxy
Solar System
Stuff In Space
Asteroids
Comets
Planets, Dwarf Planets and Moons
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
Earth
5000 Million Years old
Sun
5000 Million Years old
Universe
14000 Million Years old
Speed Of Light
300,000 km/s
Parallax Method
Astromeners take pictures 6 months apart
Apparent movement of a star between the two photos, lets you work out how far away it is
Stars further away move less than stars closer to earth
Red Shift
When a galaxy is moving away from us, the wavelength of the light changes - The light becomes redder
The Earth is an active place
Rocks provide a record of change in the Earth
Rocks are constantly being recycled
Wegner's Theory Of Continental Drift
Theory
That all continents were once together as one and they have all drifted apart
Evidence
The continents look like they fit together like a puzzle
Matching rock layers in South America and Africa
Similar fossils in South America and Africa
Wasn't accepted at first. Why?
Erosion Theory was just accepted
Wasn't detectable
Couldn't be recreated in a lab
Wegner was a meteorologist not a geologist
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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