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Tides

Tides. What causes tides?. Gravitational force Moon (mostly) and sun. Water “bulges” on both sides of Earth. Spring tide Neap tide Full moon New moon. Apogee Perigee Aphelion Perihelion. Vocabulary. Lunar Phases Picture. Orbits are not circular…. Closest – peri Furthest – apo

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Tides

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  1. Tides

  2. What causes tides? • Gravitational force • Moon (mostly) and sun

  3. Water “bulges” on both sides of Earth.

  4. Spring tide Neap tide Full moon New moon Apogee Perigee Aphelion Perihelion Vocabulary

  5. Lunar Phases Picture

  6. Orbits are not circular… • Closest – peri • Furthest – apo • Moon – gee • Sun - helion

  7. Why 50 minutes later each day?

  8. Types of Tides • Semidiurnal – 2 equal highs and lows • Mixed – 2 unequal highs and lows • Diurnal – 1 high and 1 low

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