Why Is There a White Circle Around the Moon?

Very, very high up in the sky there sometimes flows a stream of warm air. When it meets the cold air from the lower level, the cold and warm air mix and become cirrus.

Cinus is a kind of very thin cloud. It cannot hide the moon. It only covers the moon with a "thin gauze", which is made of countless small ice grains. When the moon shines over these ice grains and the light reflects back to the moon, we see a circle of white light around the moon. This means the weather is going to change soon.

1. Why Does the Sea Sometimes Rise and Sometimes Fall? The rising

   and falling of the sea is known as rising tide and ebb tide. Why does the tide rise? Actually, it is the sun and the moon that are pulling the tide. When the water on one side is pulled, the other side of the sea falls. The earth has a special kind of attraction known as gravitation. It is this gravitation that pulls you back when You JUMP; it is also this gravitation that attracts the sea water. When there is a strong gravitation, the tide rises; when there is a weak

gravitation, the tide ebbs.