4 Condensation and Precipitation CloudsCondensation and Precipitation
5 Weather and Climate Unit MYP Unit Question: What should I wear today?Area of Interaction: EnvironmentLearner Profile: Communicator
6 Weather and Climate Unit Standard: Understand how the distribution of land and oceans affect climate and weatherLearning Target: Today I am learning about condensation and dew point because they are necessary for cloud formation.
7 A Quick LabRoom-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?
8 CondensationThe water came from the surrounding air, and droplets formed as a result of condensation.
10 The air must be saturated = relative humidity of 100% CondensationCondensation 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.
11 Saturation Point http://www.npl.co.uk/upload/img/sponges.jpg
12 Dew PointDew 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.
14 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.
15 CloudsEvaporation↑Water converts to vapor as it evaporates and rises up into the atmosphere.
16 CloudsCondensationWater vapor will condense on tiny particles in the air to form water droplets known as condensation.
17 Clouds Cloud formation: A cloud is essentially a huge mass of water droplets or ice crystals suspended in the atmosphere.
18 CloudsClouds are classified by form and altitude.
19 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.
21 Cumulus Cumulus means “heap”, like a pile = cumulus puffy Indicate fair weather
22 Cumulonimbus Tall, dark and very puffy and large (billowing) Thunderclouds! May produce rain, hail, lightning, thunder & tornadoesNibo/ nimbus = likely to produce precipitation
23 Stratus Stratus = layers “spread out”, like a blanket or sheet Lowest of the clouds
24 NimbostratusDark stratus clouds that usually produce light to heavy, continuous rain.
25 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.
26 Cirrus Mainly composed of ice crystals Thin and wispy, feather like Fair now, but can get thicker = indicate a change in weatherCirrus = hair