As the moon revolves around the earth, the lighted side appears to us at different angles. The phase you see on a particular night depends on the position of the moon in relation to both Earth and sun. The first four phases are the waxing phases and the last four are the waning phases. The orbiting time of the moon is 24.84 hours. Now students are ready to begin looking at the relationship between the moon, the sun and the tides.
Tides are slow-moving water waves with long wavelengths.
They produce an alternate rise and fall in the surface level of the oceans. When the tide comes in, the water level rises and the tides break further and further inland. At the point when the surface level of the ocean is at its highest point, it is high tide. Once the high point has been reached, the tides begin to subside. When the water surface level reaches its lowest point it is low tide.