Tides

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  • Hey Sarah, wasn´t the water a lot higher up before? What happened? 
  • How do tides work?
  • It´s the tides! Before the tide was high tide and now it´s low tide.
  • Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the moon and sun, and the rotation of the Earth.
  • There are two high and two low tides at any given time.
  • High and low tides happen because the moon´s gravity pulls whatever water is facing it towards itself. This water is the high tide. The water on the sides is the low tide, because all of the water is being pulled to the moon.  The side opposite of the moon is also high tide, because it is not impacted by the moon´s gravity and is left alone.
  • Whatever tide your area is experiencing, the other side of the Earth is also experiencing. 
  • There are other types of tides, called neap tides and spring tides. Neap tides happen during quarter moons, and are when the moon and sun work at a right angle and the tides have a small difference. A spring tide is when the high tide and low tide have the biggest difference. This happens during new and full moons.
  • The Earth´s rotation puts different areas of Earth´s water into the moon´s path of gravity, also called the tidal bulge. 
  • Ohhhh.... I get it now. That´s really cool! Thanks!
  • No problem. I´m glad I could help you out.
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