6-8 > Weather
 Grade level: 6-8 Subject: Weather Duration: Two class periods
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Raging Planet: Hurricane

Students will understand the following:
 1 Wind speed increases the height of ocean waves. 2 Higher waves occur in shallower water.

Provide the following materials for each group:
 • 9" × 13" baking dish • Flexible straw • Duct tape • Water • Ruler

 1 Review with your students what they have learned about the causes and characteristics of hurricanes. Tell them they are going to do an experiment to discover the effects of wind speed and water depth on the height of waves in a hurricane. 2 Divide your class into pairs or small groups. Demonstrate how to set up the experiment as follows: 3 Place the baking dish on a desktop. Bend the straw so that it forms an L shape. Place the straw inside the baking dish in the middle of one of the 9-inch sides, so that the shorter end faces straight up, touching the side of the dish, and the longer end is suspended about half an inch over the bottom of the dish. One open end of the straw will stick straight up, and the other will face the opposite 9-inch side of the dish. Tape the straw to the inside of the dish to hold it in place. Pour water into the dish until it reaches just below the straw. 4 One partner or group member should blow very gently into the end of the straw that is sticking straight up, creating “wind” over the water in the dish. 5 Another student should observe the water at the opposite end of the straw and mark the wave height on the outside of the dish. 6 Have students measure and record the wave heights, beginning their measurements from the desktop. 7 Students should repeat the procedure two more times, blowing harder each time, and record their measurements to assess the effect of wind speed on the height of waves. 8 Have students remove the water from the dish, move the straw up near the top of the dish, and refill the dish with water until it reaches just under the straw. Then they can repeat the procedure to compare wave height in deeper and shallower water. 9 Have each student write a report describing the experiment in detail, reporting the results, and stating the conclusions he or she drew from the results.

 Adaptations for Older Students:Have students do research to find scientific explanation for the effects of wind speed and water depth on the height of ocean waves.

 1 Describe the mechanics of the development of a hurricane. 2 Storm surge water height over open water is not as high as when it reaches land. Assuming the pressure in the eye of the hurricane is the same for both instances, why is this so? 3 Many years ago, there were no laws that forced people to evacuate before a hurricane struck. Now there are mandatory evacuation laws in place. Is this good? Why? 4 Study a cross section of a hurricane and write a journal entry describing what you would see if you actually flew through one. Be sure to include details about any changes you observe within the hurricane itself. 5 Would you like to be a Hurricane Hunter and fly through a hurricane? Why or why not?

 You can evaluate your students on their reports using the following three-point rubric: Three points:complete description of all steps of experiment; accurate, detailed reporting of results; clear statement of conclusions   Two points:description of experiment somewhat disorganized or hard to follow; adequate reporting of results; statement of conclusions included   One point:vague or inaccurate description of experiment; adequate reporting of results; statement of conclusions lacking  You can ask your students to contribute to the assessment rubric by determining what information should be included in the description, results, and statement of conclusions.

 Historical Hurricanes Have students do research to find information about particularly devastating hurricanes in history. They should write descriptions of their hurricanes, giving dates and locations and describing the damage caused by the storms. Dire Predictions Have students contact the National Weather Service’s Hurricane Warning Service in Miami, Florida, or do research on the Internet (or both) to find out how hurricanes are predicted and how their paths are tracked.

 “Atlantic Hurricanes in the Second Half of the Nineteenth Century” Jose Fernandez-Partagas and Henry F. Diaz, Bulletin of the American Meteorological Society, December 1996Some of the difficulties with establishing and knowing the history of certain weather phenomena are illustrated in this revision to previously held scientific beliefs about the hurricane activity of the last century. “Atlantic Hurricanes” Max Mayfield and Miles Lawrence, Weatherwise, February 1996One of the busiest hurricane seasons in decades was that of 1995. This feature article reviews the intense hurricane activity of that season. Hurricanes Michael Allaby, Facts on File, 1997As part of its “Dangerous Weather” series, this renowned publisher of current events publications presents an examination of hurricanes specifically for young adult readers. Hurricanes: Their Nature and Impacts on Society Roger A. Pielke, Jr. and Roger A. Pielke, Sr., Wiley, 1997As a complement to the meteorological explanations of hurricanes, this work covers government policy for hurricanes in this country as well as hurricanes’ social impacts.

 HURRICANE! EBS HURRICANE! links page. Atlantic Hurricane Tracking Data by Year Archived hurricane tracking data from 1886 to present. Also archived data for Pacific hurricanes from the last few years. Images of Hurricanes and Other Storms Stills and movies of hurricanes and other storms.

 Click on any of the vocabulary words below to hear them pronounced and used in a sentence. Definition:A region of low barometric pressure. Context:If the water temperature is 80 degrees F or more the storm becomes a tropical depression. Definition:An area like a hole in the center of a tropical cyclone marked by only light winds or complete calm with no precipitation. Context:A column of clear air develops. This is the eye of the storm. Definition:An acronym for Geostationary Operational Environmental Satellites. Context:The newest weapons for monitoring storms are the new Geostationary Operational Environmental Satellites. GOES Satellites. Definition:Domes of water produced by the action of cyclonic winds during a hurricane, in which the sea level can be up to five meters higher than normal. Context:In places where the shoreline is shallow the storm surge can reach 30 feet high. Definition:A tropical cyclone occurring in the region of the Philippines or the China sea. Context:In the western Pacific typhoons are often more powerful because they have more warm sea to travel over to build up their power to full strength.