Get ready! Take out your lab worksheet from yesterday. (relative humidity lab)

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Get ready! Take out your lab worksheet from yesterday. (relative humidity lab)

Yesterday Address yesterday mistake: dew point chart, instead of relative humidity chart

Condensation and Precipitation
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 Room-temperature water in a plastic cup – water level near the top. Observe the outside of the container. Record. Let’s add 2-3 ice cubes. Are there any changes on the outside of the plastic cup? 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

The air must be saturated = relative humidity of 100%
Condensation Condensation is a process by which gas, such as water vapor becomes a liquid. The air must be saturated = relative humidity of 100% Condensation occurs when saturated air cools.

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

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
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