5th grade-ch. 7 lesson 4 how do clouds form
TRANSCRIPT
Chapter 7Lesson 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 cloudsCloud 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 precipitationForm of
precipitationHow 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
snow
• Ice crystals high in atmosphere grow larger snowflakes
snow
hail• 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
hail
YouTube video-How does hail form
Precipitation [02:21]