map symbols Pressure Air Masses Fronts Atmosphere 200 200 200 200 200 400 400 400 400 400 600 600 600 600 600 800 800 800 800 800 1000 1000 1000 1000 1000 large body of air that forms over water or land What is an air mass? type of air mass forms over land in Northern Canada. What is a Continental Polar? air mass forms over warm ocean waters near the tropics What is a Maritime Tropical? warm air mass that forms over dry land What is a Continental Tropical? air mass forms over the northern Pacific Ocean where it is very icy What is Maritime Polar? 200 Points the boundary between two different air masses What is a front? 400 Points This front occurs when warm air moves over slower moving colder air. What is a warm front? 600 Points This front occurs when cold air moves under slower moving warmer air. What is a cold front? 800 Points This type of front occurs when a warm and cold air mass are too weak to move the other. What is a stationary front? 1000 Points This type of front occurs when a warm air mass is trapped in between two cold air masses. What is an occluded front? 200 Points Layer where all weather occurs What is the troposphere? 400 Points Layer containing the ozone What is stratosphere? 600 Points What happens to density as altitude increases What is decreases? 800 Points The coldest atmospheric level What is the mesosphere? 1000 Points The densest layer of the atmosphere What is the troposphere? 200 Points This is the symbol for… What is a cold front? 400 Points This is the symbol for… What is a warm front? 600 Points This is the symbol for… What is a stationary front? 800 Points This is the symbol for… What is an occluded front? 1000 Points The capital letter H What is an area of high pressure? 200 Points A low pressure system that can begin as thunderstorm over northern Africa and develop into a powerful Category 4 by the time it reaches the U.S. What is a Hurricane? 400 Points What the weather is often like in times of high pressure What is fair and dry? 600 Points This is a low pressure storm that forms in a cumulonimbus cloud and brings rain, wind and lightning. What is a thunderstorm? 800 Points A funnel cloud that forms out of a thunderstorm What is a tornado? 1000 Points A rhyme that may save your life during a flood What is “Turn around. Don’t drown”?