Tropical Cyclones

What is the minimum sea surface temperature required for a tropical cyclone to develop?

• A. 18°C
• B. 21°C
• C. 26.5°C
• D. 30°C

In which part of the world are tropical cyclones called 'hurricanes'?

• A. Indian Ocean
• B. South Pacific Ocean
• C. North Atlantic Ocean
• D. Western Pacific Ocean

What is the main source of energy for a tropical cyclone?

• A. Warm ocean water
• B. Cold air masses
• C. Solar radiation on land
• D. Jet streams

What is the central calm area of a tropical cyclone called?

• A. Eye wall
• B. Core
• C. Eye
• D. Centre

Which best describes air movement in a tropical cyclone in the Southern Hemisphere?

• A. Anticlockwise and outward
• B. Clockwise and inward
• C. Anticlockwise and inward
• D. Clockwise and outward

Which of these is not a typical condition in the eye of a tropical cyclone?

• A. Calm winds
• B. Clear skies
• C. Heavy rainfall
• D. Low pressure

What weather conditions are found in the eye wall of a tropical cyclone?

• A. Calm and dry
• B. Clear and sunny
• C. Strongest winds and heaviest rain
• D. High pressure and cold air

Which condition weakens a tropical cyclone?

• A. Warm ocean water
• B. High humidity
• C. Moving over land
• D. Staying near the equator

Why do tropical cyclones rarely form near the equator?

• A. Too much sunlight
• B. Air pressure too high
• C. Coriolis force too weak
• D. Water too warm

When do tropical cyclones usually occur in the South-West Indian Ocean?

• A. April to September
• B. November to April
• C. May to August
• D. December to February