Weather

What is Weather?
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1. Weather is the condition of the atmosphere at a particular time or place. 2. The weather is shaped into 4 main factors the air, the sun, water, the earth's movement.

Weather vs Climate
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3. **Climate ** is what you expect; **Weather** is what you get.
 * Climate** is about long-term records, trends and averages;
 * Weather** is the day to day experience.

Air Pressure
__ [] __ 4. Complete the following chart:
 * || ==== **High Pressure** ==== || ====** Low Pressure **==== ||
 * Air movement (up or down) || down || up ||
 * Temperature of air || warm || cool ||
 * Wind movement at ground || clockwise || counter-clockwise ||
 * Expected weather || clear sunny weather || thunder storms, lighting ||

[|**http://oncampus.richmond.edu/academics/education/projects/webunits/weather/clouds.html**]
 * Use this web site to answer the following questions. **

1. Clouds are a visible mist of billions of water and ice particles floating in the sky. 2. Clouds form when air cools below its saturation point and causes water vapor to condense into tiny water droplets. The water droplets then form a cloud. 3. There are three families of clouds: cirrus, cumulus, and stratus. These are the latin names given to clouds in 1804. Cirrus means 'curl of hair', cumulus means 'heap', and stratus means 'layer'.

and these clouds are named because they resemble wisps of curly hair. || Forms in winter and summer. It depends on the speed and strength. || of a thin sheet of white or gray clouds that are broken into bands, blobs, rolls or waves. || Altocumulus clouds can sometimes mean that it will rain or snow. || "rainstorm" and "spread out" in Latin. || Rain and snow often accompany the development of nimbostratus clouds. || low altitude clouds. || Cumulus clouds can cause rain, although rain does not always follow cumulus clouds. || because they are puffy ("cumulo") and because they often are dark clouds which cause rainstorms ("nimbus"). || Cumulonimbus clouds can produce rain showers, snow showers, hail, or even thunderstorms. ||
 * **Cloud Type** || **Description** || **Possible Weather** ||
 * Cirrus || "Cirrus" in latin means curl
 * Altocumulus || Altocumulus clouds consist
 * Nimbostratus || The word Nimbostratus means
 * Cumulus || Cumulus clouds are puffy,
 * Cumulonimbus || These clouds are named

To help you identify clouds, download, print and construct the following "Cloud Key". []

After completing the chart, you could try a Cloud Quiz at; []

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 * The following web site describes some of the instruments meteorologists use to collect data about the weather. **

Use the information to complete the chart. The source of this information is American so you may have to determine the equivalent metric unit to record in the chart.

pressure || Millibars || of sunshine in a day || South, East, West ||
 * ** Instrument Name ** || ** What It Measures ** || ** Unit of Measurement ** ||
 * Barometer || atmospheric
 * Thermometer || temperature || degrees ||
 * . Rain Gauge || rainfall || mm ||
 * . Campbell Stokes Recorder || sunshine || number of hours
 * . Anemometer || wind speed || mph. ||
 * . Wind Vane || wind direction || pointing towards North,
 * Hygrometer || amount of humidity || degrees ||


 * || == Weather Wise ==

**Warm and Cold Fronts**
|| **Understanding Basic Concepts** - A cold front happens when a fast-moving mass of cold air hits a warm air mass. - A warm front happens when a fast moving mass of warm air encounters a cold air mass, and rides up on top of it.

- The warm, humid air eventually rises high enough for water droplets and clouds to form, and rain to fall. - The water vapour condenses to a lot of water droplets, which form tall clouds. || []

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Write the capital letter A or B to identify the type of front being described **at the end of each sentence**.

A = Cold Front B = Warm Front

1. Cool air mass - warm air mass moves in. B

2. Warm air mass - cool air mass moves in. A

3. Brings gentle rains that may last for hours or days. B

4. Strong winds are formed followed by heavy rain, crashing thunder, and flashing lightning. A

5. When the front passes, the temperature warms up and it becomes humid. B

6. When the front passes, the weather turns cooler. B 7. Farmer Brown prefers this type of front. B

8. Usually happens and is over with quickly. A

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