Question: Why we need a Moon

Sandra Greive answered on 10 Mar 2017:

Without the moon there would be no tides in the ocean. This change in water level along the coast is important because we think it might have allowed plants and animals that were adapted to living in the sea to learn to live in air. This is how the first land animals and plants came about. The moon also reflects light from the sun and moves through the earth’s shadow (from the sunlight) giving us an easy way of tracking the passing of time over a month. Finally when you compare the way earth and mars spin (mars doesn’t have a moon) earth spins around its axis without too much wobbling. Mars wobbles a lot. So maybe the moon helps keep the earth balanced so it doesn’t wobble to much as it spins (1 full turn every
day).