Tuesday, May 24, 2011

Tides

Tides: Information
  • Gravity- is the force that pulls everything together. It keeps us on earth and the all the planets in orbit. 
  • Tides: are the rise and the fall of the oceans water that occurs every 12.5 hours. 
  • As the oceans bulge the tides rise.
  • Tides can be used as alternative energy.
  • Moon has a bigger impact on the earth because it is closer. 

  • These are caused mainly by the difference in how much the moons gravity pulls on different parts of Earth. 
  • This is the force of gravity pulls the earth and the moon towards each other. 

  • The moons gravity causes high tides on the side closest to the moon
  • Low tides occur between the two high tides 
  • The force of the moons gravity pulls Earth towards the moon, leaving the water behind. 
Spring Tides 

  • The sun's gravity also pulls on the Earth
  • The combined forces of the sun and the moons produce a tide with the greatest difference between consecutive low/high tides = SPRING TIDE

Neap Tides:
  • 1/4 and 3/4 of the moons phases line up between earth and the sun, this is at right angles. The different arrangement produced a neap tide.
  • This occurs 2 times a month. Not as strong as a spring tide. 



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