Tides



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=http://www.tuppenceworth.ie/images/lorraine_art/images/tides%20in.jpg= =Tides occur because of the gravatational effect from the moon and earth on the earth's surface. These effects pull the earth's surface causing the water to change it's apperance on the beach. The names of the tides are high tide and low tide. In high tide, which occurs later in the day, the water is farther up the beach. Low tide happens in the morning and moves back down the beach so that there is tide pools on the beach.= = = =__Experiment__= =1. Fill a bucket 1/4 full of water= =2. Hold the bucket one foot from your knee= =3. Swing the bucket in a full 360 degree circle and stop when the bucket is back at your knee.= =This experiment shows how the earth's and moon's gravational field affect the earth's water. It shows how tides occur. The moon has a dominate pull because it is closer, but the sun also has an affect. When the moon gets closer to the earth in its rotation, it pulls the tide towards it.= = = =On occasion, the moon, sun, and earth will all be lined up causing a bigger gravitational pull, one of the largest high tides every. This is called a spring tide, which has nothing to do with the season. A neap season is when the moon nor the sun has no gravitational pull on the earth's surface. This is one of the lowest low tides of all. == = = = = = =http://content.answers.com/main/content/wp/en/0/02/NorfolkTides.gi=