1. Explain how humidity change with temperature? The higher the temperature, the higher the humidity... the higher the humidity... warm air can hold more water vapor warm air can hold more water vapor than cold air. than cold air.

2. MYP Unit Question: What should I wear today? Area of Interaction: Environment Learner Profile: Communicator Standard: Understand how the distribution of land and oceans affect climate and weather.

3. Learning Standard: Learning Standard: Today Im learning about clouds because they form as a result of weather. Opening: Opening: Cloudiest place on Earth Work Session: Work Session: Cloud Formation & Types Presentation Cloud Worksheet Closing Closing: Cloud Review

4. Opening:

5. Temperature: 38˚ Wind Chill: 38˚ Visibility: 7 mi Humidity: 87% Wind Speed: 3 mi S What would you wear?

6. Remnant of an ancient volcano Highest mountain in Scotland – 4409 feet from sea level Maritime Sea breeze creates a chilling wind between 20-30 knots/hour Fog is present on the mountain 80% of the time

7. What do all these events have in common?

8. Cloud Formation Clouds form when water vapor in the air condenses Water molecule attaches itself to a particle of dust (condensation nuclei) Cloud Formation Animation http://prism.engineering.asu.e du/research/anima.php Cloud Formation – National Geographic http://www.natgeoeducationvideo.com /film/1198/cloud-formation

9. How does water vapor get into the air?

10. Where does the cloud nuclei come from? Volcanoes, pollution, cars, sea spray from the ocean, and fires

11. the cloud naming system In 1802 an Englishman by the name of Luke Howard invented the cloud naming system Latin names to describe clouds. The first part of a cloud's name describes height, the second part shape.

12. How can air pollution affect weather? The more pollutants in the air, the more things the water molecules can attach to, the more it might precipitate.

14. Heights The prefixes denoting Heights Cirro Cirro high clouds above 20,000 feet Alto Alto and mid level clouds between 6,000 - 20,000 feet There is no prefix for low level clouds.

15. Cirrus Cirrus mean curly or fibrous Stratus Stratus means layered Cumulus Cumulus means lumpy or piled Nimbo or nimbus Nimbo or nimbus indicates that a cloud can produce precipitation.

16. Given that information, describe what each of the following clouds would look and act like? following Cumulonimbus Nimbostratus Cirrocumulus Altostratus Lumpy or piled up + precip. Precipitation + layered High + Curly Mid-level + layered

17. Cumulonimbus Clouds Photograph by Corbis Premium Collection/Alamy the highest of all clouds 50,000 feet (15,000 meters). distinctive anvil-top shapes occur because of high winds

18. Saskatchewan Thunderheads ( Cumulonimbus clouds) Photograph by Mark Duffy/Alamy associated with severe storms form when warm, humid air cools enough that water vapor condenses around tiny particles to form water droplets or ice crystals.

19. Lenticular Clouds Photograph by Arco Images/Alamy The summit of Washington's Mount Rainier formed by high winds blowing over rough terrain sometimes described as a "stack of pancakes."