Download Clouds - TypePad

Get ready!
• Take out your lab worksheet from yesterday.
(relative humidity lab)
Yesterday
• Address yesterday mistake: dew point chart,
instead of relative humidity chart
Clouds
Condensation and Precipitation
Weather and Climate Unit
• MYP Unit Question: What should I wear
today?
• Area of Interaction: Environment
• Learner Profile: Communicator
Weather and Climate Unit
• Standard: Understand how the distribution of
land and oceans affect climate and weather
• Learning Target: Today I am learning about
condensation and dew point because they are
necessary for cloud formation.
A Quick Lab
1. Room-temperature water in a plastic cup –
water level near the top.
2. Observe the outside of the container. Record.
3. Let’s add 2-3 ice cubes.
4. Are there any changes on the outside of the
plastic cup?
5. What is the liquid on the container? Where
did it come from?
Condensation
• The water came from the surrounding air, and
droplets formed as a result of condensation.
Water Cycle - Condensation
http://visualcurriculums.org/wp-content/uploads/2013/10/03_WaterCycleVB_C.jpg
Condensation
• Condensation is a process by which gas, such as
water vapor becomes a liquid.
http://www.westendwindows.co.uk/uploads/images/Misc/condensation-advice.jpg
• The air must be saturated = relative humidity of
100%
• Condensation occurs when saturated air cools.
Saturation Point
http://www.npl.co.uk/upload/img/sponges.jpg
http://image.shutterstock.com/display_pic_with_logo/483673/483673,1273777313,4
/stock-vector-wet-sponge-drawing-53015515.jpg
Dew Point
• Dew point is the
temperature at which a
gas condenses into a
liquid.
• Air is saturated at its
dew point.
• It must have a surface
to condense on.
The Making of a Cloud video
• http://www.pbs.org/wgbh/nova/labs/video_p
opup/3/19/
What is a cloud?
• It is a collection of millions of tiny water
droplets or ice crystals suspended in the air.
• It forms when the air is cooled and
condensation occurs.
Clouds
Evaporation
↑
Water converts to vapor as it evaporates and rises up into the
atmosphere.
Clouds
Condensation
Water vapor will condense on tiny particles in the air to form
water droplets known as condensation.
Clouds
Cloud formation:
A cloud is essentially a huge mass of water droplets or ice crystals
suspended in the atmosphere.
Clouds
• Clouds are classified by form and altitude.
http://www.superteacherworksheets.com/featured-items/images/cloud-types.jpg
No two clouds are exactly alike, and they are always changing their shape. The reason we
have different types of clouds is that clouds formation takes place at different heights and
temperatures.
Cirrus
Cumulus
Stratus
Cumulus
• Cumulus
means
“heap”, like
a pile =
cumulus
• puffy
• Indicate
fair
weather
Cumulonimbus
• Tall, dark and very puffy and large (billowing)
• Thunderclouds! May produce rain, hail, lightning, thunder &
tornadoes
• Nibo/ nimbus = likely to produce precipitation
Stratus
• Stratus =
layers
• “spread out”,
like a blanket
or sheet
• Lowest of the
clouds
Nimbostratus
• Dark stratus clouds that
usually produce light to
heavy, continuous rain.
Are fogs and clouds the same?
There is no basic difference between a fog and a cloud. A fog is a stratus cloud that
formed near the ground. They are caused by a cold current of air from above striking
down upon the warmer surface of the land or water.
Cirrus
• Mainly
composed of
ice crystals
• Thin and
wispy, feather
like
• Fair now, but
can get thicker
= indicate a
change in
weather
• Cirrus = hair
Precipitation
Precipitation
• Refers to water in any form that falls from the
atmosphere/ clouds. Snow
Rain
Hail
Sleet