What causes hurricanes?

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What causes hurricanes?

  1. 1. Key Question: How do hurricanes form? Aims: • to understand the causes of a hurricane • to know the key features of a hurricane
  2. 2. Write down five key features of a hurricanes’ formation. 1. 2. 3. 4. 5. Highlight the factor that you think is the most important for a hurricane to form. How do hurricanes happen?
  3. 3. Task: Sort the following statements into the correct order to reveal how a hurricane is formed. Write numbers 1-7 in the boxes. Latent heat warms the cool air causing it to rise. Water vapour condenses to form storm clouds and droplets of rain. Rising air is replaced by more warm, humid air from the ocean below. The condensation releases heat called latent heat of condensation. Warm, moist air from the ocean surface begins to rise rapidly. The cycle continues, drawing more warm, moist air into the developing storm and continuously moving heat from the surface to the atmosphere. The ocean temperature has reached 27 degrees Celsius. Latent heat: the amount of energy in the form of heat that is required for something to change
  4. 4. THE ANSWERS Latent heat warms the cool air causing it to rise. 5 Water vapour condenses to form storm clouds and droplets of rain. Rising air is replaced by more warm, humid air from the ocean below. The condensation releases heat called latent heat of condensation. 4 6 Warm, moist air from the ocean surface begins to rise rapidly. 3 2 The cycle continues, drawing more warm, moist air into the developing storm and continuously moving heat from the surface to the atmosphere. 7 The ocean temperature has reached 27 degrees Celsius. 1 Latent heat: the amount of energy in the form of heat that is required for something to change
  5. 5. Task: Now you know the correct order, try the activity again! Do not look back at your last attempt. Latent heat warms the cool air causing it to rise. Water vapour condenses to form storm clouds and droplets of rain. Rising air is replaced by more warm, humid air from the ocean below. The condensation releases heat called latent heat of condensation. Warm, moist air from the ocean surface begins to rise rapidly. The cycle continues, drawing more warm, moist air into the developing storm and continuously moving heat from the surface to the atmosphere. The ocean temperature has reached 27 degrees Celsius. Latent heat: the amount of energy in the form of heat that is required for something to change
  6. 6. How does a hurricane work? Add these labels to the correct places on the diagram rain bands storm clouds eye vertical flow hurricane winds direction of rotation
  7. 7. Memory Test! You will have 15 seconds to look at the diagram and labels below. You will then have 15 seconds to draw as much as you remember. This will be repeated three times. Direction of rotation Storm clouds eye Rain bands Hurricane winds Vertical flow
  8. 8. Extended Task: Now write the ‘causes of a hurricane’ section of your project, using the information you have collected this lesson. Include the key features of a hurricane and what causes it. A hurricane is formed when…
  9. 9. Structure of a Hurricane
  10. 10. Storm surge One major cause of hurricane damage is storm surge. Storm surge is the rising of the sea level due to the low pressure, high winds, and high waves associated with a hurricane as it makes landfall. The storm surge can cause significant flooding. The strong winds blowing towards the shore help push water towards shore on the right side of the hurricane's direction of motion. This piling up contributes to most of the coastal flooding.
  11. 11. Hurricane location

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