____________ is the amount of water vapor in the air.

______________ is a ridge of sand that connects an island to the mainland.

______________ is changes in the angle of axis.

____________ is the sawing and grinding action of water armed with rock fragments.

_______________the average of all weather data, including extremes, that helps to describe the environment of a place or region.

_______________ is known as the blue planet.

______________are huge magnetic storms on the Sun’s surface

___________ are known as bottom dwellers.

What is the name of layer 13?  

_____________is the water hemisphere.