Question

If you have a calendar that shows only the phases of the moon, can you predict when spring tides and neap tides will occur?

Answer 1

Yeah, it is known that the sun and moon exert a great gravitational force on the earth which cause tides. And it is obvious that Spring tides occur during the full moon and the new moon. During the moon's quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. The result is a smaller difference between high and low tides and is known as a neap tide. Neap tides are especially weak tides.