5th Grade-Ch. 7 Lesson 4 How do clouds formPresentation Transcript
Chapter 7 Lesson 4 How do clouds form?
Make a cloud demonstration
Demonstrate cloud formation with a large, wide-mouthed jar, a match, a cup of very warm water, a rubber band, and a plastic bag.
Pour the water into the jar.
Drop a lit match into the jar, then quickly cover it with the plastic bag.
Secure the bag on the lid with a rubber band.
Push the bag into the jar, and pull it out again. A cloud will form.
Ask: How did the match help form a cloud? Why do you need to secure the plastic bag onto the jar?
Clouds are made of:
water vapor or ice crystals - depends on temp. & air pressure
Activity- How many drops of water can a cloud hold? I predict that the cotton ball will hold _____ drops of water before it overflows. Result: The cotton ball held ___ drops before it overflowed.
Clouds and Drizzle [02:37]
Types of clouds Cloud Where it forms Description cirrus > 6,000m above ground High altitude, thin, wispy & white cumulonimbus thunderhead Base-1,000m above ground Top-12,000m above ground Vertical cause thunderstorms cumulus Base-2,000 -7,000 m above ground Mid-altitude, puffy stratus <2,000m above ground Low altitude Dark, cover sky fog Ground level Forms b/c air cools
Types of Clouds [02:34]
Types of clouds-YouTube NASA: Our World: Cool Clouds
Types of Clouds-
Types of precipitation Form of precipitation How it forms rain If ice crystals fall in air > 0 C melt freezing rain Ice storm-rain freezes when hits cold object sleet Frozen raindrops snow hail
Ice crystals high in atmosphere grow larger snowflakes
Forms when strong winds blow upward into cloud repeatedly
Made up of layers of ice by updrafts
Circulates in cloud-too heavy & falls
Small frozen raindrop that gets caught in updrafts