Test 8, Chapter 8

The basic cause of all weather is the

Scientists who study the weather are called

The imaginary line running through the earth from North Pole to South Pole is the

The air that we live in receives most of its warmth from the

Different seasons are caused by the ___ of the earth’s axis.

Winds are produced by ____ differences on the earth.

Warm air is ____ than cool air.

The earth’s surface spins at over ____ miles per hour.

You will label the following on a diagram of the earth & mark the 2 areas that have the most changeable weather.

The amount of water vapor that the air can hold at a given temperature is the ____ of the air.

The lowest possible temperature at which air is able to hold all of its water vapor is its

the process in which water vapor leaves the air and changes into liquid water is called

Air is saturated when the humidity of the air is ___ percent.

Water vapor that condenses to form liquid water on the ground is called

water vapor that condenses and forms frozen water on the ground is called

An ice crystal in a cloud becomes too heavy, falls, melts, and lands on the earth as liquid water.

falling ice crystals melt slightly, stick, and freeze together into snowflakes

falling ice crystals melt into raindrops, then refreeze and land on earth as tiny pieces of ice.

falling ice crystals melt, hit the earth as liquid rain, but refreeze as soon as they land

a small piece of ice is tossed up and down inside a cloud, forming several layers of ice, until it is too heavy and falls to earth.

puffy, bulgy clouds belong the the ___ family

layers of flat clouds belong to the ___ family

wispy, curly clouds very high in the atmosphere belong to the ___ family

sheets of clouds that often produce rain are___ clouds