Weather Part II Revised 2010 Revised 2010 ©Mark Place, 2009-2010 www.LearnEarthScience.com Revised 2010 Revised 2010

What’s the relationship between wind and waves? Page 10 direct (the stronger the wind, the bigger the waves)

45°N 45°S 75°N 20°N southwest northwest northeast northeast Using the chart on page 14, state the prevailing wind direction for each latitude below: 45°N 45°S 75°N 20°N southwest northwest northeast northeast ESRT Page 14

Is air rising or sinking Is air rising or sinking at the equator? Is air rising or sinking at 30°N?

An air mass is a large body of air with similar characteristics Air Masses and Fronts An air mass is a large body of air with similar characteristics throughout

Air masses are classified based on their and amount of temperature moisture Air masses get their properties based on Where they form

The abbreviations used to classify air masses use the following letters: c, m, T, P, and A. For each letter, describe its property: Word Means c m T P A continental dry maritime moist Tropical warm Polar cold Arctic very cold

What would their characteristics be? mT cP warm and moist cold and dry

Complete the isotherm map in your study guide What type of air mass would form over each area? Please label. cA mP mP cP mT cT mT mT Complete the isotherm map in your study guide

Know what the symbols mean World Air Mass Source Regions Know what the symbols mean

a boundary (interface) FRONTS Please Go To Page 14 a boundary (interface) between air masses

The Rule: triangles and bumps always point in the direction the front is moving

a cold front moving south an occluded front a stationary front with warm air on the south side a warm front moving north a stationary front with cold air on the south side

Cold Fronts Animation #1 Images

Warm Fronts Animation #1 Images

Clouds

Animation PAGE 12

Safety Precautions for Hurricanes & Tornadoes Hazardous Weather Safety Precautions for Hurricanes & Tornadoes

Footage Click on for video clips! Hurricanes are intense LOW pressure that spiral counter-clockwise Hurricanes are also known as cyclones and typhoons. They form over warm waters.

Tornado Footage http://www.stormstock.com/storm_cloud_footage.html http://www.ultimatechase.com/Tornado_Video.htm Tornadoes are also known as twisters. They form over land and can spiral up to 300 mph. Their strength is measured by the Fujita scale of F1 to F 5.

Weather Summary 1. Warm, Moist Air = Low Pressure Weather Poor Cool, Dry Air = High Pressure Weather Good 2. Warm moist air cools by expansion Temperature Drops Dew point is reached Condensation nuclei form Clouds form PRECIPITATION? 3. As the difference between dew point and air temperature decreases chance of precipitation increases.