1. Weather and Climate part 2 Tools to Measure Weather: Thermometer: A liquid-filled tube used to measure air temperature. Temperature @ BainPop

2. Weather and Climate part 2 Tools to Measure Weather: Anemometer: An instrument that measures wind speed with small cups that spin in the wind. Wind Vane and Wind Socks: Show wind direction. Barometer: Measures air pressure. A spring inside can squeeze or relax as air pressure increases or decreases

3. Weather and Climate part 2 Air Mass: A huge body of air with similar air temperature and humidity throughout. Front: Boundaries where warm and cool air masses meet.

4. Weather Fronts

5. MAP TAP 2002-2003Weather Fronts5 Air Mass A large body of air with similar temperature and moisture. Air masses form over large land or water masses.

6. MAP TAP 2002-2003Weather Fronts6 Frontal Boundaries Where air masses interact – also know as a front. 4 kinds of fronts: – Cold front – Warm front – Occluded front – Stationary front

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

8. MAP TAP 2002-2003Weather Fronts8 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

9. MAP TAP 2002-2003Weather Fronts9 Comparing Warm and Cold Fronts Cold fronts move faster than warm fronts. The weather activity in a cold front is often violent and happens directly at the front. Cold fronts have sudden gusty winds high in the air creating turbulence. The weather activity in a warm front generally happens before the front passes. In a warm front the cloud formation is very low often creating situations of poor visibility.

10. MAP TAP 2002-2003Weather Fronts10 Occluded Fronts When a warm front is trapped by 2 cold fronts. Shown on a weather map by a purple line with alternating triangles and semicircles pointing the direction the front is moving. Back to activity

11. MAP TAP 2002-2003 Stationary Fronts A front that stops moving or is moving very slowly. Shown on a weather map with alternating red semicircles pointing away from the warm air and blue triangles pointing away from the cold air. Back to activity

12. Locate the 4 types of fronts on this weather map. Hint 1 Hint 2 Hint 3 Hint 4

13. Cold Fronts

14. Warm Front

15. Stationary Front

16. Occluded Front

17. Weather Fronts17 Be a Weather Forecaster You are planning to travel to Alabama in 2 days. The high temperature there for today is 68 º F. Use the map to help you predict whether the temperature in Alabama will increase, decrease, or stay the same. Explain why you think so.

18. 18 Be a Weather Forecaster There is a cold front approaching. The temperatures will probably be cooler behind the front.

19. MAP TAP 2002-2003Weather Fronts19 Be a Weather Forecaster Of course, meteorologists (weather forecasters) use much more data than fronts and air masses to help them forecast the weather more accurately. But any forecast is just a prediction of what might happen. Even with the best data, weather forecasts can be wrong.

20. Weather and Climate part 2 Cold Front: Develops when a cold air mass moves into a warm air mass. Cold Fronts often bring brief, strong storms followed by cooler, drier weather.

21. Weather and Climate part 2 Warm Front: Develops when a warm air mass moves into a cold air mass. Warm fronts tend to bring steady, light precipitation followed by warmer, more humid weather.

22. Weather and Climate part 2 So, what occurs where air masses with different temperatures meet?

23. Weather and Climate part 2 So, what occurs where air masses with different temperatures meet? Precipitation!

24. Weather and Climate part 2 Climate: The average weather pattern in an area over many years. Climate @ BrainPop

25. Weather and Climate part 2 How can a mountain range impact an area's climate?

26. Weather and Climate part 2 How can a mountain range impact an area's climate? Often one side of a mountain range receives a lot of precipitation because air cools and loses its moisture as it rises over the mountains. This causes a Rain Shadow, or dry area on the other side of a mountain range.

27. Weather and Climate part 2 Greenhouse Effect: Gasses that trap heat keeping Earth's climate warm. Global Warming: A warming of the Earth caused by more greenhouse gases in the atmosphere. Global Warming @ BrainPop