Tropical – from the Equator – warm Polar – from the Polar regions – cold Arctic – from over the North Pole – very cold… Maritime – over the sea – wet Continental – over land - dry Given a double barrelled name, named after where they are from, then what they travel over.

These are isobars, they denote equal points of pressure. They never cross. Join points of equal pressure carefully with a pencil. Mark and shade the area of highest and lowest pressure. Draw an arrow to show the direction of air flow. Name the airmass passing over the United Kingdom. Suggest the weather over the United Kingdom.

Low High Polar Maritime Cold and Wet Weather. The larger the difference in pressure, the faster the wind. What type of air?