1. TIDES

2. Tide Formation Rise/fall of water at coastline Rise/fall of water at coastline High tide – water comes in High tide – water comes in Low tide – water goes out Low tide – water goes out Occur in all bodies of water Occur in all bodies of water HIGH TIDE LOW TIDE

3. Gravity “pulls” on the water causing a tidal bulge MOON EARTH Tides are caused by the interaction of Earth, the moon, and the sun. Tides are caused by the interaction of Earth, the moon, and the sun. CAUSES OF TIDES

4. Cause of Tides… continued High Tide High Tide Occurs on 2 sides of the Earth Occurs on 2 sides of the Earth 1.The side of the Earth that is closest to the moon 2.The side of the Earth that is farthest away from the moon Low Tide Low Tide Occurs on 2 sides Occurs on 2 sides of the Earth 1.The sides of the Earth that are between the high tide

5. Daily Tide Cycle There are 2 high tides every day There are 2 high tides every day There are 2 low tides every day There are 2 low tides every dayWHY?????? … Because any given spot on the Earth faces the moon and then faces away from the moon all in 1 day

6. Monthly Tide Cycle 2 times every month there are two special tides. This occurs when the sun, moon, and Earth line up in specific ways. They are called… Spring Tides Spring Tides Neap Tides Neap Tides

7. Spring Tide Moon, Sun, and Earth are in a straight line. Moon, Sun, and Earth are in a straight line. High Tides are higher than normal, low tides are lower than normal. High Tides are higher than normal, low tides are lower than normal. SUN MOON EARTH MOON SUN - OR -

8. Neap Tides Moon, Sun, and Earth are at a 45 degree angle. Moon, Sun, and Earth are at a 45 degree angle. High tides are lower than normal, low tides are higher than normal. High tides are lower than normal, low tides are higher than normal. SUN MOON EARTH

9. Tides Diagram HH H H L L LL