Transcript
Ch. 2Ch. 2Sec. 4 Sec. 4
Water in the Water in the AtmosphereAtmosphere
humidity•measure of amount of water vapor in air
relative humidity•percentage of water vapor in air compared to maximum amount air could hold
•measured w/ psychrometer
dew point•temperature @ which condensation begins
A cloud’s nameA cloud’s name
contains clues contains clues
about its height &about its height &
structure. structure.
3 main types of clouds
cumulus stratus cirrus
Each type of cloud is associated with a different kind of weather.
cumulus
clouds
cumulus clouds•usually indicate fair
weather•form < 2 km above
ground
cumulus clouds•look like
fluffy, rounded piles of cotton
cumulonimbus cumulonimbus cloudscloudscalled
thunderheadsb/c make
thunderstorms
cumulonimbus cumulonimbus cloudcloud
strstratatus us cloudsclouds
•form in flatat layers•usually cover all or
most of sky
nimbostratus clouds•May make rain or snow
cirrus clouds sometimes called
“mare’s tails”
cirrus cloudsform only @ high
levels
cirrus clouds made up mostly of ice crystals
fog
Clouds that form @
or near ground
Fog often forms when the ground cools at night after a warm, humid
day.
Cloud formations
3 main types of clouds
cumulus cirrusstratus
cirrus clouds Sometimes called “mare’s tails”
cumulus clouds• look like fluffy, rounded piles of cotton
cumulonimbus cumulonimbus cloudsclouds
called thunderheads
b/c make
thunderstorms
cumulus clouds•usually indicate fair
weather•form < 2 km above
ground
form only at high levels
cirrus clouds
fog
Clouds that form @
or near ground
strstratatus cloudsus clouds•form in flatat layers
•usually cover all or most of sky
cirrus clouds made up mostly of ice crystals
Make and label the
CLOUDS pg. 65
cirruscirrocumulusaltocumulusaltostratuscumulonimbusnimbostratusstratuscumulus fog
Cloud observations
• Draw pictures and label the clouds that you see in the sky, with a brief description of the clouds.
• List 5 different images you notice that the clouds make.
Ch. 2 Sec. 4 Open Notes Quiz1. Describe the water cycle.2. What instrument is used to measure relative
humidity?3. Clouds of all kinds form when water vapor in the
air becomes _______ or ________.4. The temperature at which condensation begins is
called the ___________. (Hint: Think of which teacher brought you to science class )
5. Name and describe the 3 main types of clouds.
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