precipation lori

PrecipitationPrecipitation

Prepared by:Prepared by:

Lori PettyLori Petty

InstructionsInstructions

• The themes in this module are The themes in this module are organized in the main menu with organized in the main menu with links to each theme.links to each theme.

• The navigational buttons will appear The navigational buttons will appear on the bottom of each slide.on the bottom of each slide.

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ObjectivesObjectives

After finishing this module, the After finishing this module, the students: students:

Recognize the different types of Recognize the different types of precipitation.precipitation.

Understand that some types of Understand that some types of weather can be very dangerous.weather can be very dangerous.

Define the different types of Define the different types of precipitation.precipitation.

Main MenuMain Menu1. Objectives2. Instructions3. Forms of Precipitation

a. Rainb. Snowc. Sleetd. Freezing Raine. Hail

4. Post test5. References

PrecipitationPrecipitation

There are several types of There are several types of precipitation. After water vapor is precipitation. After water vapor is condensed into ice crystals or water condensed into ice crystals or water droplets, it can fall upon the ground droplets, it can fall upon the ground in several different forms of in several different forms of precipitation.precipitation.

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Forms Of PrecipitationForms Of Precipitation

Precipitation

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RainRain

Heavy Rain Lightning Storms

RainRain

•Rain is the most common Rain is the most common type of precipitation. type of precipitation.

•Rain is when drops of water Rain is when drops of water fall on the Earth. Rain usually fall on the Earth. Rain usually takes on one or two forms: takes on one or two forms: showers or drizzles. showers or drizzles.

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RainRain

•A shower lasts a short period A shower lasts a short period of time, and is made up of of time, and is made up of large heavy drops.large heavy drops.

•A drizzle lasts a lot longer A drizzle lasts a lot longer and are made of small fine and are made of small fine droplets of water.droplets of water.

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Rain

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Snow

SnowSnow

• Snow is formed when water vapor Snow is formed when water vapor turns directly into ice. Snow can be turns directly into ice. Snow can be formed as ice pellets or snow flakes. formed as ice pellets or snow flakes.

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SnowSnow

• Often the warm surface of Earth Often the warm surface of Earth melts the freshly fallen snow.melts the freshly fallen snow.

• However, if the Earth’s surface is However, if the Earth’s surface is cold, the snow can accumulate on cold, the snow can accumulate on the ground.the ground.

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SnowSnow

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SleetSleet

• Sleet is a mixture of rain and snow.Sleet is a mixture of rain and snow.

• The raindrops are a liquid before The raindrops are a liquid before freezing. freezing.

• This is why sleet is different than This is why sleet is different than snow. snow.

• Sleet is not fluffy like snowflakes.Sleet is not fluffy like snowflakes.

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SleetSleet

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Freezing RainFreezing Rain

• Freezing rain is when water droplets Freezing rain is when water droplets become super-chilled. become super-chilled.

• The droplets do not freeze in the air. The droplets do not freeze in the air. • They freeze instantly when they hit They freeze instantly when they hit

the road, car, or other object.the road, car, or other object.• Roads become very slippery and Roads become very slippery and

dangerous.dangerous.

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Freezing RainFreezing Rain

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Freezing RainFreezing Rain

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HailHail

• Hail is ice crystals that begin to fall Hail is ice crystals that begin to fall towards the Earth’s surface. towards the Earth’s surface.

• Then the strong winds pick up the ice Then the strong winds pick up the ice crystals and push them back up into the crystals and push them back up into the clouds.clouds.

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HailHail

• When they start to fall again they grow in When they start to fall again they grow in size. size.

• This process may be repeated several This process may be repeated several times or until the hail becomes too heavy times or until the hail becomes too heavy for the wind to carry.for the wind to carry.

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HailHail

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Post testPost test

Please read and answer the following Please read and answer the following questions.questions.

A shower lasts longer than a drizzle.A shower lasts longer than a drizzle.

False

True

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Rain can take on 1 or 2 forms.Rain can take on 1 or 2 forms.

False

True

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Snow can be formed as ice pellets or Snow can be formed as ice pellets or snowflakes.snowflakes.

False

True

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If Earth’s surface is warm, snow can If Earth’s surface is warm, snow can accumulate.accumulate.

False

True

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Sleet is a mixture of rain and snow.Sleet is a mixture of rain and snow.

False

True

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Freezing rain occursFreezing rain occurs

When ice falls from the clouds.

When rain droplets become super chilled.

When rain drizzles.

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Hail isHail is

when ice crystals fall to the ground.

when droplets are heavy and big.

when rain instantly freezes.

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What creates large pieces of hail?What creates large pieces of hail?

Strong winds and rain

Big droplets of water

Ice crystals and strong winds

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Sleet is different than snow becauseSleet is different than snow because

Sleet is fluffy.

The rain drops are liquid before freezing.

The rain drops are solid in form.

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Freezing rain can causeFreezing rain can cause

dangerous driving conditions.

doors and windows to freeze shut.

both A and B.

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Try AgainTry Again

Great Answer!Great Answer!

A

ReferencesReferencesScott Foresman: A Closer Look, First Grade Textbook 2008http:www.gregnilsen.com/blogcfc/index.cfm/soo8/12/11/If-You-Can’t-DR.http:lipstick-diaries.blogspot.com/2009/03/dear-winter.htmlApollo./sc.vsc.edu/classes/met130/notes/chapter7/frain.htmlhttp:stormgasm.com/storm%20store/photos/hail/hail.html