Warm front and cold front video 3:50

Transcription

1 Construct an explanation of the relationship between air pressure, weather fronts, and air masses and meteorological events such as tornados and thunderstorms Unpacked :

2 Warm front and cold front video 3:50

3 Factors influencing Climate The water cycle affects both climate and weather Solar Distance Latitudinal Location Water Presence Bodies of Water Currents

4 Difference between climate weather

5 Analyze the pictures, Then write the information the picture is providing on movement, density, pressure, wind.

6 Turn to a seat partner and explain why some air masses are cool, cold, warm, and hot as well as moist or dry. Cool/Moist Air Cold/Dry Air Cool/Moist Air Warm/Moist Air Hot/Dry Air Warm/Moist Air

7 With your seat partner, explain which air masses would be high pressure and which air masses would be low pressure. Why? Cool/Moist Air Cold/Dry Air Cool/Moist Air Warm/Moist Air Hot/Dry Air Warm/Moist Air

8 Air form in large clumps and move over the Earth s surface and slowly change. These huge bodies of air that cover thousands of kilometers are called AIR MASSES. Two Properties of air masses are: 1. Moisture content 2. Temperature An air mass has some of the same general properties as the land or water that it forms over. Air masses with moisture form over water and dry air masses form over land. Air masses that form at the poles are cold and the ones that form in the tropics (or near the equator) are warm.

9 Air Masses A huge section of the lower troposphere that has the same kind of weather throughout

10 mt Types of air masses Maritime Tropical Warm Moist Air usually over tropical waters

11 Name the air mass that will influence our weather.

12 mp Maritime Polar Cold Humid air coming from over cold ocean waters

13 ct Continental Tropical Hot dry Air originating over desert areas

14 cp Continental Polar Cold dry air coming from high latitudes

15 ca Continental Arctic Extremely Cold dry air coming from high latitudes

16

17 When 2 air masses meet, they do not mix. What happens is that they form a border that is known as a front. Most of the weather that we think of happens along fronts.

18 Flip book

19 Cold Front Facts Forms when a fast moving cold air mass moves under a warm air mass pushing the warm air up. Brings thunderstorms, snow or heavy rain. Weather that follows-clear Cooler temperatures behind the front.

20 Cold Front A cold air mass is replacing a warmer air mass. Back to activity Shown on a weather map by a blue line with triangles pointing the direction the cool air is moving.

21 Green is Notice the speed of the cold front This area is where the T- Storms are during this front.

22 Cooler Temperatures Notice the speed of the cold front

23 Warm Front Facts Forms when a slow moving warm air mass overtakes a cold air mass. Because the cold air is more dense than warm air, the warm air moves over the cold air rising Brings clouds and long steady rain. Weather that will follow-clear & warm

24 Warm Front Warm air mass replacing a cooler air mass. Shown on a weather map by a red line with half circles pointing the direction the warm air is moving. Back to activity MAP TAP Weather Fronts 24

25 Stationary Front Facts The front is not in a hurry, it is very slow or not moving. Forms when a cold air mass collides with a warm air mass and neither is strong enough to move/overtake the other. This usually means really long periods of clouds and steady precipitation. Clear weather will follow The symbol for this front is alternating blue triangles and red half-circles facing in opposite directions.

26 Stationary Front

27 Occluded Front Facts Forms when a warm air mass is caught between two cold air mass pushing the warm air mass off of the ground and higher. Weather it brings-cool temperates and heavy/large amounts of rain or snow Weather that will follow is clear symbol for this front is alternating purple triangles and half-circles pointing in the direction that the front is moving.

28 Occluded Front

29

30 Where are the Fronts? L

31 Where are the Fronts? L H L

32 High pressure brings dry and clear weather Low pressure brings clouds and rain There it is, and this is the area of steady rain.

33 Cyclone-Low Pressure Symbol L Name- Cyclone Weather it brings- Storms and precipitation Type of pressure- Low pressure

34 Anticyclone/High Pressure Symbol- H Name- Anticyclone Weather it brings - dry, clear weather Type of pressure High pressure

35