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The sun, earth and moon systemTide-O-matic model
This "Tide-O-Matic" experiment from Exploratorium describes how to build a simple model to explore the influence of the sun and moon on our tides. In most places on the earth, where the ocean meets the land, there are two high tides and two low tides each day. This activity models the equilibrium theory of tides, showing why there are two tide cycles per day, why the heights of the tides change over the course of a month, and why the tides occur about an hour later each day.
Scope and Sequence connection: 8:3 The Sun, Earth and Moon System.
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