Waves currentstides

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Waves currentstides

  1. 1. Waves <ul><li>Caused by wind . </li></ul><ul><li>Wind is caused by unequal heating of the Earth. </li></ul><ul><li>Size </li></ul><ul><ul><li>Distance winds blows (further=bigger) </li></ul></ul><ul><ul><li>Speed of the wind (faster=bigger) </li></ul></ul>
  2. 2. Currents – River in the Ocean <ul><li>Surface Currents </li></ul><ul><ul><li>Caused by wind . </li></ul></ul><ul><ul><li>Cold (from polar regions) and Warm (from Equator) </li></ul></ul><ul><ul><li>Affect climate </li></ul></ul><ul><ul><ul><li>Ex. Gulfstream makes England warmer than it should be </li></ul></ul></ul><ul><li>Deep Currents </li></ul><ul><ul><li>Caused by differences in density, </li></ul></ul><ul><ul><ul><li>Temperature </li></ul></ul></ul><ul><ul><ul><li>Salinity </li></ul></ul></ul>
  3. 3. Tides – the daily rise and fall of the Earth’s water on the shore <ul><li>Gravitational pull of the moon (70%) and the sun (30%) </li></ul><ul><li>One high tide and one low tide every six hours. </li></ul><ul><li>High tide – one every 12 hours </li></ul><ul><li>Low tide – one every 12 hours </li></ul><ul><li>Spring Tide </li></ul><ul><ul><li>Biggest difference between high tide and low tide </li></ul></ul><ul><ul><li>When moon, Earth, and sun are in straight line (full & new moons) </li></ul></ul><ul><li>Neap Tide </li></ul><ul><ul><li>Smallest difference between high tide and low tide </li></ul></ul><ul><ul><li>When moon, Earth, and sun are at right angles (1 st & 3 rd quarter) </li></ul></ul>

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