Notes What are tides? Tides are the daily and As the tide comes the level of water level of water on the beach goes of Earth's waters on its coastlines. and as the tide goes th High Tides and Low Tides High tides are when the water reaches its Low tides are when the water reaches its point. point. What causes tides? Tides are caused by the of Earth, the Moon, and the The of the sun and the moon is the reason for tides. The moon exerts a much greater gravitational force on the Earth because it is much closer to the Earth to it more than it pulls on Gravity – Tidal Bulges The Moon pulls on the water on the side of the Earth. This creates a bulge of water, called a the Moon. on the sides of Earth Tidal Bulges - High Tide In places where there are tidal bulges, is occurring along the coastlines. Tidal Bulges - Low Tide • In places between the bulges, is occurring Station 1 - Spring Tide How are the Earth sun and moon positioned during a spring tide? 2. In the diagram below, draw the moon in two positions that would cause a spring tide. Earth Sun During which lunar phases do spring tides occur?​