1. Moisture in the Atmosphere

3. What makes a Cloud? Moisture
Reduction in pressure or temperature causing condensation.
Condensation nuclei - small particles in the atmosphere around which cloud droplets can form.
Dust
Salt
Smoke

4. Cloud Formation
Orographic lifting occurs when wind encounters a mountain and the air has no place to go but up.
The air expands and cools resulting in cloud formation.

5. Orographic lifting occurring in Maui.

6. Cloud Formation
Cloud formation occurs with the collision of air masses (fronts) of different temperatures.
As fronts collide clouds form

7. Weather Map
Warm air rises quickly and forms cumulonimbus clouds and thunderstorms (Sometimes tornados)

11. Stability
How rapidly any given mass of air cools determines its stability.
Stability is the ability of an air mass to resist rising.
Latent heat is stored energy in water vapor that is not released to warm the atmosphere until condensation takes place.

12. How to Classify Clouds based on Height
Cirro – 6000 m or higher
Alto – 2000m to 6000m
Strato – below 2000m

13. How to Classify Clouds based on Shape
Cirrus – Thin and Wispy
Latin – hair
Cumulus – Puffy-flat bottom
Latin – pile or heap
Stratus – Sheet like
Latin – layer
Nimbus - Rain
Latin - Cloud

22. Water Cycle
The constant movement of water between the atmosphere and Earth’s surface.
Evaporation – liquid to gas
Condensation – formation of water droplettes
Precipitation- Rain
(Evapo)transpiration- plants loose water through stomata

24. The Water Cycle