Go back to previous page

Project title or topic of activity

Hurricanes


Author(s): Elena Tkacz, Martha Blanke, Stacy Moore, and Peggy James

Date: Spring 2001

 

Summary of Activity

Students will learn about how hurricanes are formed and how different coastal animals are affected by these storms. They will learn about conditions necessary for hurricane by constructing their own miniature "hurricanes" with hot water and tissue paper. They will be able to see how a hurricane looks by seeing pictures and doing tornado tube simulations. Students will also learn about ways in which human presence in coastal environments impacts survival rates of animals in hurricanes.

 

Grade levels

This activity can be adapted to work in many grade levels, from second or third grade through college by changing the complexity of the information and explanations.

Background information

A hurricane is a strong tropical cyclone that measures several hundred miles in diameter and has 74+ mph winds. It is an area of intense low atmospheric pressure.

Hurricanes have two main parts. The first is the eye of the hurricane, which is a calm area in the center of the storm. Usually, the eye of a hurricane measures about 20 miles in diameter, and has very few clouds. The second part is the wall of clouds that surrounds the calm eye. This is where the hurricane's strongest winds and heaviest rain occur.

Hurricanes are born over warm, tropical oceans. The top 50 meters of the ocean surface needs to be 26.5o C. The air above the ocean must be cooler than the water temperature, allowing thunderstorms to form. Hurricanes are fueled by water vapor that is pushed up from the warm ocean surface, so they can last longer and sometimes move much further over water than over land. The combination of heat and moisture, along with the right wind conditions, can create a hurricane.

Hurricanes are enormous, and they can range in size from 300-600 miles wide and about 10 miles high. They typically have a lifespan of about 10 days. The wind speed of a hurricane is 75 miles per hour or more. Between 40 mph and 74 mph winds, the storm is called a tropical storm.

The fierce winds and rains cause damage to natural areas such as mangrove swamps, estuaries as well as causing major erosion in coastal areas. Also hurricanes damage manmade structures such as housing, buildings, and infrastructure.

Hurricanes play an important part in maintaining marine habitats.

Marine animals can withstand the natural effects of these storms, but they are not adapted to withstand

discharge of boat fuel and oil that can continue for weeks, damage caused by the movement of lobster and crab traps, pollutants from runoff, introduction of non-native plant species. Historically man has been a primary contributor to the dispersal of non-native plant species; however, a hurricane event can quickly disperse the non-native plant species with the high speed winds.

The Puerto Rican Parrot inhabits vegetated sand runs of clear creeks. Hurricane Opal improved this endangered species partly because fallen logs from the storm provided more cover. Also, more eddies were formed so the fish could hide from the severe weather.

Sea Turtles live only in forests of very old pine trees. Foraging habitat is provided in pine and pine hardwood stands 3O years old or older with foraging preference for pine trees 1O inches or larger in diameter. Almost all the nesting trees were destroyed in Hurricane Andrew. The species was already endangered due to deforestation of these older trees.

The Red-Headed Duck are bottom dwellers and they filter feed. Phytoplankton had a major bloom due to runoff and the sediment layer smothered many organisms. Turbidity, nutrient loading, and dissolved organic carbon had a negative effect on the organisms. Pollutants from sunken boats and from runoff were deadly.

 

 

Humans living and working in coastal areas cause these problems. Humans also affect the survival of these animals by diminishing large portions of different species. Many of the animals who are most affected by hurricanes are endangered species already.

Hurricanes are natural, but the affected species populations must be healthy in order to withstand these mighty storms. Our responsibility is to ensure they are allowed the best chance possible.



Credit for the activity

This activity has been modified from an activity in Janice VanCleave’s Oceans for Every Kid, John Wiley & Sons, 1996, pp 147-155.


Estimated time to do the activity/activities

This activity should last approximately 25 minutes.



Goals of Activity/Activities:

Goals:

At the end of this activity, students will be able to:

- Understand the components needed to create a hurricane (warm water, cooler air).

    • Understand some effects of hurricanes on marine animals.
    • Understand the effects of hurricanes on humans

National Science Education standards met in this activity:

- Activities reflect the content of oceanography, concentrating on the role of oceans in weather.

    • Activities are active and engaging:
      • Activities encourage exploration, investigation, and creativity by allowing students to explore the effects of using different temperatures of water, etc.
      • Activities encourage a playful, friendly, adventuresome climate by allowing students to work together.
      • Activities encourage participation of all students by allowing them to each create their own miniature hurricanes.
      • Activities relate to phenomena and objects that occur in a child’s everyday life, since they are done with common materials like 2 liter bottles, water, and tissue paper.
      • Activities offer opportunities to use tools to build


 

Materials Needed

- Tornado tube connectors and 2 2-liter bottles per connector

(found at many toy stores)

    • Posters with newspaper clippings and facts
    • Typing paper
    • Construction paper
    • Markers
    • Drawing compass
    • Scissors (1 per student)
    • Transparent tape
    • Thread (3" per student)
    • Hot water
    • Large pyrex glass bowls (3)
    • 2 balloons and an extra 2 liter bottle



Preparation & teacher "heads up"

    • The patterns for the mini hurricanes should be traced on the tissue paper before class.
    • The thread should be cut into 12" sections.
    • The water should be heated up at the beginning of class.
    • Enough tornado tubes should be made for every few students to get one.
    • Prepare a timeline puzzle using these steps:
    1. Hot air rises over tropical oceans near the equator.
    2. Thunderclouds form
    3. Winds begin circling around the eye of the storm.
    4. Storm travels.
    5. Circling winds increase to 74 MPH or more.
    6. If hurricane reaches the shore, land is flooded by the storm surge.
    7. Hurricane fades gradually as it moves inland.
    • Prepare a poster with facts from The Magic School Bus Inside a Hurricane.

Include: Storm Surge, Why a hurricane spins, Where Hurricanes are formed, Definitions, and whatever other facts may interest the group.



Step-by-Step Procedure

Weather

    • We all experience it every day.
    • In certain extreme cases, weather can cause severe damage.

Does anybody know what type of storm causes the most damage to coastal areas?

    • Hurricanes: Hurricane Andrew caused around $20 billion of damage

Hurricanes

Can somebody please describe what a hurricane looks like?

(Bring out and demonstrate the tornado tube for a warm-up activity)

    • This is what a hurricane looks like. Does it remind you of any other type of storm?

(Pass the tornado tube around the class)

    • Hurricanes are actually very similar to tornados and cyclones, but they occur over water.
    • The eye of the hurricane is the calmest part of the storm.

Where are most hurricanes formed?

(Open poster: read description of where hurricanes are formed)

    • These areas usually have cool air and warmer water.

Why do you think hurricanes are formed over warm water? How do hot and cold air interact with each other?

    • Let’s do an experiment to see. (call up a volunteer) This bottle is filled with cool air. By placing the bottle in a bath of hot water, we can heat up the air to see what happens.

What happened?

    • The balloon inflated. Why?
    • Hot air expands, which means the air molecules move further apart. This makes the hot air less dense or "lighter" than the cool air, so it rises up and "floats" on the cooler air.

Now that we know that hurricanes are formed over warm water and that warm air rises above cooler air, can anybody guess how the air in a hurricane moves?

    • We can do an experiment to see how it moves. (Pass out mini-hurricanes and hot water to every two students.)
    • The spiral represents the clouds in a hurricane. Put it above the hot water and see what happens. You can use the cold water to change the temperature of the water.
    • Predict what will happen with different water temperatures.
    • (Discuss everyone’s observations…does hotter water make it spin faster?)
    • (Turn over hurricane poster and discuss the movement of air)

Why do the winds in a hurricane spin in a circle?

- The coreolis effect (Describe this with poster explanation.)

Does every storm that starts over tropical oceans become a hurricane?

    • No, before the wind speed reaches 74 MPH (and after it reaches 40 MPH) it is called a tropical storm. Many of these never reach land.

How does the tropical storm escalate into a hurricane?

    • (Explain this description on the poster)
    • We have a short video clip that shows this process very well (show video)

Without looking at the poster, can anyone remember all of things that are necessary to create a hurricane?

    • (sum up the ingredients of a hurricane.)

Now we understand how hurricanes work, but why do the do so much damage?

    • (Describe the storm surge on the poster.)

- To sum up, let’s see how much you all understand about hurricanes.

    • (Call up a volunteer to put the correct words with the definitions. Discuss.)
    • (Call up another volunteer to put together the puzzle. Discuss.



Images, work sheets, additional web pages

 


Items for discussion or conclusion

Questions:

Give at least two questions you could ask the students after the experiment and/or formulate a conclusion that ties the experiment together with larger concepts.

1st question: From your experiments, what do you need to create a hurricane?

2nd question: (If there is time) Pick your favorite marine animal. What might happen to that animal in a hurricane?

3rd question: What effects might humans have on how well animals survive hurricanes?

4th question: What are some steps that we can take to reduce the human impact on the survival of the environment.

Conclusion

Go around the group and have the students explain why the hurricane models work. Does it work like that in the real world?




Assessment

They should be able to discuss the models and how hurricanes work in the world. They should be able to list at least two components that are necessary for a hurricane to form (i.e. warm water, cool air, ocean)

 

Beyond the Activity
Further activities which relate to and extend the complexity of the experiment.

Each student could pick an animal and research how it was affected in a particular hurricane to present it to the class. Information on many animals is available on the Internet. Universities and museums in Florida have a lot of pictures and facts.



Web Resources
A web address with information on the topic of the activity.

Web Address

Web Address: http://www.miamisci.org/hurricane/howhurrwork.html

This site includes lotss of neat activities and easy to understand pictures and definitions. This site has links, so it would be a great place for kids to start researching.



Additional References

Reference

Cole, JoAnna. The Magic School bus inside a hurricane Scholastic Inc. 1995.

Eyewitness. Weather 1996. ISBN 0-7894-0719-1

National Geographic Video. Nature’s Fury! 1994. ISBN 0-7922-3248-8

VanCleave, Janice. Oceans for Every Kid, John Wiley & Sons, 1996, pp 147-155.

 

Spanish keywords
optional

Hurricane — huracán

Ocean — océano

Cyclone — ciclón

Hot — caliente

Cold — frío

Experiment - experimento

Animal — animal, bestia

Motor boat — lancha a motor

Leak — fuga

Fuel — carburante

Coast — costa

Human — humano

Effect — efecto

Affect — afectar

List - listar