Lesson Y9-U03-L04

Y9-U03-L04 Tropical Storms: How They Form Quiz: KS3 Geography, Unit 15

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson Y9-U03-L04, Tropical Storms: How They Form: 20 multiple choice questions for the KS3 Geography (National Curriculum), Unit 15: Year 9: Weather, Climate and a Changing Atmosphere, written with Revision Ninja.

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The 20 questions

  1. What is the minimum sea temperature a tropical storm needs?

    • At least 27 degrees Celsius.
    • At least 40 degrees Celsius.
    • At least 0 degrees Celsius.
    • At least 10 degrees Celsius.

  2. Which ingredient supplies the heat and moisture that fuel a tropical storm?

    • Cold polar air sinking onto the sea surface.
    • Strong, steady winds blowing across a desert.
    • Warm ocean water of at least 27 degrees.
    • Thick snowfall covering the surface of the sea.

  3. Which of these is NOT one of the four conditions a tropical storm needs?

    • Warm ocean water of at least 27 degrees.
    • Low wind shear.
    • Heavy snowfall over the land just beforehand.
    • A latitude of about 5 to 30 degrees.

  4. What is wind shear?

    • Winds that blow straight out from the centre of a storm.
    • Winds that blow at exactly the same speed at every height.
    • Winds blowing at different speeds or directions at different heights.
    • Winds that blow only at night over the open sea.

  5. Which effect makes a tropical storm rotate?

    • The Coriolis effect, caused by the Earth's spin.
    • The rain shadow effect, caused by mountains blocking the wind.
    • The albedo effect, caused by sunlight reflected off ice.
    • The greenhouse effect, caused by gases in the air.

  6. Why does a tropical storm not form right on the Equator?

    • The sea on the Equator is always too cold to evaporate.
    • The Equator has too much wind shear to allow any cloud.
    • The Equator is too far from the warm oceans to gain moisture.
    • There is too little Coriolis effect to make the air spin.

  7. Why does a tropical storm weaken after it moves over land?

    • It gains extra cold air that stops the rotation completely.
    • Land creates more ocean water, which feeds the storm further.
    • It loses the warm ocean water that supplies its heat and moisture.
    • Land increases the wind shear, which speeds up the storm.

  8. What happens when rising moist air cools in a developing storm?

    • Condensation forms towering clouds and releases heat.
    • The air freezes solid into ice above the sea.
    • The air sinks and becomes dry and clear.
    • Evaporation removes all the water from the cloud at once.

  9. What does condensation release that powers the storm?

    • Salt, which thickens the clouds further.
    • Sunlight, which lights up the storm's eye.
    • Heat, which makes the air rise even faster.
    • Cold, which makes the air sink even faster.

  10. Which sequence correctly orders how a tropical storm builds?

    • Warm moist air rises; it cools and forms clouds; condensation releases heat; inrushing air spins.
    • Cold air sinks onto the sea; clouds slowly evaporate; the sea freezes over; the storm dies out.
    • Winds stop; the sea cools; rain falls; the storm spins.
    • Clouds form over land first; the sea warms more slowly; the storm moves inland and gains heat there.

  11. Between which latitudes do most tropical storms form?

    • 60 and 90 degrees north only.
    • 5 and 30 degrees north and south.
    • 0 and 5 degrees north only.
    • 30 and 60 degrees south only.

  12. Which of these is an ocean where tropical storms form?

    • The Arctic Ocean.
    • The Atlantic Ocean.
    • The Southern Ocean around Antarctica.
    • The Dead Sea in the Middle East.

  13. When are tropical storms most common?

    • Mid-winter, when cold air sinks over the seas.
    • Late summer and autumn, when the seas are warmest.
    • Early spring, when sea ice starts to melt.
    • Evenly throughout every month of the year.

  14. A tropical storm is moving over Florida. What is most likely to happen to it?

    • It turns into a snowstorm straight away.
    • It stops spinning, because the Coriolis effect is greater over land.
    • It weakens, because it loses its warm ocean fuel.
    • It grows stronger, because the land adds warm water to it.

  15. Which location is most likely to see a tropical storm forming?

    • Cold sea at about 60 degrees north in the middle of January.
    • Shallow sea directly on the Equator in March.
    • Warm sea at about 15 degrees north in the western Atlantic in September.
    • Dry land in the middle of a large desert in June.

  16. A student says storms form on the Equator because it is the hottest place. What is the best correction?

    • Storms form on the Equator only in winter, when the sea there is at its coldest and most calm.
    • Storms form only over land, never over any sea near the Equator.
    • Storms need Coriolis spin to rotate, which is too weak on the Equator, so they form in the 5 to 30 degree belts.
    • The Equator is so hot that heat stops clouds forming, so storms avoid it and form only on cool high land.

  17. Which combination of conditions best explains a storm forming in late summer over the western Atlantic?

    • Dry land at 5 degrees, dry air, strong wind shear and a latitude of 0 degrees.
    • Sea at least 27 degrees, deep warm water, low wind shear and a latitude of 5 to 30 degrees.
    • Sea below 10 degrees, shallow water, strong wind shear and a latitude of 60 degrees.
    • Sea at 15 degrees, shallow water, strong wind shear and any latitude at all.

  18. How does warm ocean water power a tropical storm?

    • Warm water makes the wind shear stronger, which tears the storm apart.
    • Cold water sinks and freezes the air above the storm into snow.
    • Warm water stops the air from rising, so the storm slows down.
    • Evaporation gives moist, warm air that rises and condenses, releasing energy.

  19. Climate change warms the oceans. What is the most likely effect on tropical storms?

    • Storms will disappear completely from every ocean on Earth.
    • Storms will stop spinning because warm seas remove the Coriolis effect.
    • Storms could form in new areas and grow stronger, with more fuel.
    • Storms will only form on the Equator, where the sea is coldest.

  20. Which judgement best evaluates whether warm water is the single most important condition for a storm?

    • Warm water is essential as the fuel, but the storm also needs low shear and a latitude that allows spin.
    • Latitude alone decides everything, so warm water and wind have no role at all.
    • Warm water is the only condition, so latitude and wind shear can be ignored entirely.
    • Warm water is unimportant, because storms can form in any cold sea without fuel.

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