Why Do Tornadoes Spin ? : āĻā§°ā§āĻŖā§āĻĄā§ āĻāĻŋāϝāĻŧ āĻā§ā§°ā§ ?
1. Tornadoes Form During Powerful Thunderstorms
Tornadoes usually form during very powerful thunderstorms. These storms create strong winds and unstable air conditions.
āĻā§°ā§āĻŖā§āĻĄā§ āϏāĻžāϧāĻžā§°āĻŖāϤ⧠āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠**āĻŦāĻā§ā§°āĻāĻĄāĻŧ (Thunderstorm)**ā§° āϏāĻŽāϝāĻŧāϤ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧāĨ¤ āĻāĻ āĻāĻĄāĻŧāĻŦā§ā§°ā§ āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻŦāϤāĻžāĻš āĻā§°ā§ āĻ āϏā§āĻĨāĻŋā§° āĻŦāĻžāϝāĻŧā§ā§° āĻĒā§°āĻŋāϏā§āĻĨāĻŋāϤāĻŋ āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤
2. Warm Air Rises from the Ground
Warm air near the ground rises quickly upward because warm air is lighter.
āĻŽāĻžāĻāĻŋā§° āĻāĻā§°ā§° āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻĻā§ā§°ā§āϤāĻāϤāĻŋāϤ⧠āĻāĻĒā§°āϞ⧠āĻāĻ ā§, āĻāĻžā§°āĻŖ āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻšāĻžāϞāϧā§āϝāĻŧāĻž āĻā§°ā§ āϏāĻšāĻā§ āĻāĻĒā§°āϞ⧠āĻāĻ āĻŋāĻŦ āĻĒāĻžā§°ā§āĨ¤
3. Cool Air Moves In
Cooler air moves in to replace the rising warm air. This movement creates strong air currents.
āĻāĻ āĻŋ āϝā§ā§ąāĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ā§° āĻ āĻžāĻ āĻĒā§ā§°āĻŖ āĻā§°āĻŋāĻŦāϞ⧠āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧā§ āϏā§āĻŽāĻžāĻ āĻāĻšā§āĨ¤ āĻāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻŦāĻžāϝāĻŧā§ā§° āĻāϞāĻžāĻāϞ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧāĨ¤
4. Wind Shear Causes Spinning
Winds at different heights blow in different directions. This effect is called wind shear, and it creates a horizontal spinning tube of air.
āĻāĻŋāύā§āύ āĻāĻā§āĻāϤāĻžāϤ āĻŦāϤāĻžāĻš āĻāĻŋāύā§āύ āĻĻāĻŋāĻļā§ āĻŦāϝāĻŧāĨ¤ āĻāĻ āĻāĻāύāĻžāĻ Wind Shear (āĻŦāϤāĻžāĻšā§° āĻĻāĻŋāĻļā§° āĻĒāĻžā§°ā§āĻĨāĻā§āϝ) āĻŦā§āϞāĻŋ āĻā§ā§ąāĻž āĻšāϝāĻŧ, āϝāĻžā§° āĻĢāϞāϤ āĻŦāĻžāϝāĻŧā§ā§° āĻāĻāĻž āĻ āύā§āĻā§āĻŽāĻŋāĻ āĻā§ā§°āĻŖāĻŋ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧāĨ¤
5. Rising Air Tilts the Spin
The rising warm air tilts this spinning air tube vertically, forming a rotating funnel called a tornado.
āĻāĻĒā§°āϞ⧠āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§āϝāĻŧā§ āĻāĻ āĻā§ā§°āĻŖāĻŋ āĻĨāĻāĻž āĻŦāĻžāϝāĻŧā§ā§° āύāϞāĻžāĻā§ āĻāϞāĻŽā§āĻŦ āĻā§°āĻŋ āĻĻāĻŋāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻž āĻā§ā§°āĻŖā§āϝāĻŧāĻž āĻĢāĻžāύā§āϞ āϏā§āώā§āĻāĻŋ āĻā§°ā§, āϝāĻžāĻ āĻā§°ā§āĻŖā§āĻĄā§ āĻŦā§āϞāĻŋ āĻā§ā§ąāĻž āĻšāϝāĻŧāĨ¤
Key Point
Tornadoes spin because rising warm air and wind shear create strong rotation.
āĻā§°ā§āĻŖā§āĻĄā§ āĻā§ā§°ā§ āĻāĻžā§°āĻŖ āĻāĻĒā§°āϞ⧠āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§° āĻŽāĻŋāϞāĻŋ āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻā§ā§°āĻŖāĻŋ āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤
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MCQ
1. Tornadoes usually form during which type of storm ? : āĻā§°ā§āĻŖā§āĻĄā§ āϏāĻžāϧāĻžā§°āĻŖāϤ⧠āĻā§āύ āϧ⧰āĻŖā§° āĻāĻĄāĻŧāϤ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧ ?
A) Snowstorm | āϤā§āώāĻžā§° āĻāĻĄāĻŧ B) Thunderstorm | āĻŦāĻā§ā§°āĻāĻĄāĻŧ C) Sandstorm | āĻŦāĻžāϞāĻŋā§° āĻāĻĄāĻŧ D) Rainstorm | āĻŦā§°āώā§āĻŖā§° āĻāĻĄāĻŧ
Ans: B) Thunderstorm | āĻŦāĻā§ā§°āĻāĻĄāĻŧ
Explanation: Tornadoes usually develop during strong thunderstorms where unstable air and powerful winds exist.
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻā§°ā§āĻŖā§āĻĄā§ āϏāĻžāϧāĻžā§°āĻŖāϤ⧠āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻŦāĻā§ā§°āĻāĻĄāĻŧā§° āϏāĻŽāϝāĻŧāϤ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧ, āϝ’āϤ āĻŦāĻžāϝāĻŧā§ āĻ
āϏā§āĻĨāĻŋā§° āĻā§°ā§ āĻŦāϤāĻžāĻš āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻĨāĻžāĻā§āĨ¤
2. What type of air rises quickly from the ground ? : āĻŽāĻžāĻāĻŋā§° āĻĒā§°āĻž āĻā§āύ āϧ⧰āĻŖā§° āĻŦāĻžāϝāĻŧā§ āĻĻā§ā§°ā§āϤāĻāϤāĻŋāϤ⧠āĻāĻĒā§°āϞ⧠āĻāĻ ā§ ?
A) Cold air | āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧā§ B) Warm air | āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ C) Dry air | āĻļā§āĻāĻžāύ āĻŦāĻžāϝāĻŧā§ D) Dusty air | āϧā§āϞāĻŋāĻŽāϝāĻŧ āĻŦāĻžāϝāĻŧā§
Ans: B) Warm air | āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§
Explanation: Warm air is lighter than cold air, so it rises quickly upward. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧā§āϤāĻā§ āĻšāĻžāϞāϧā§āϝāĻŧāĻž, āϏā§āϝāĻŧā§ āĻ āĻĻā§ā§°ā§āϤāĻāϤāĻŋāϤ⧠āĻāĻĒā§°āϞ⧠āĻāĻ ā§āĨ¤
3. What replaces the rising warm air ? : āĻāĻ āĻŋ āϝā§ā§ąāĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ā§° āĻ āĻžāĻ āĻā§āύ⧠āϞāϝāĻŧ ?
A) Dust | āϧā§āϞāĻŋ B) Cooler air | āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧā§ C) Smoke | āϧā§āĻā§ąāĻž D) Steam | āĻāĻžāĻĒ
Ans: B) Cooler air | āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧā§
Explanation: Cooler air moves in to replace the rising warm air, creating strong air movement.
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻ āĻŋ āϝā§ā§ąāĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ā§° āĻ āĻžāĻ āĻĒā§ā§°āĻŖ āĻā§°āĻŋāĻŦāϞ⧠āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧā§ āϏā§āĻŽāĻžāĻ āĻāĻšā§ āĻā§°ā§ āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻŦāĻžāϝāĻŧā§ āĻāϞāĻžāĻāϞ āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤
4. What is the difference in wind direction at different heights called ? : āĻāĻŋāύā§āύ āĻāĻā§āĻāϤāĻžāϤ āĻŦāϤāĻžāĻšā§° āĻĻāĻŋāĻļā§° āĻĒāĻžā§°ā§āĻĨāĻā§āϝāĻ āĻāĻŋ āĻā§ā§ąāĻž āĻšāϝāĻŧ ?
A) Wind storm | āĻŦāϤāĻžāĻšā§° āĻāĻĄāĻŧ B) Wind shear | āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§° C) Air pressure | āĻŦāĻžāϝāĻŧā§āĻāĻžāĻĒ D) Air current | āĻŦāĻžāϝāĻŧā§ āϧāĻžā§°āĻž
Ans: B) Wind shear | āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§°
Explanation: Wind shear happens when winds blow in different directions or speeds at different heights.
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§° āϤā§āϤāĻŋāϝāĻŧāĻž āĻšāϝāĻŧ āϝā§āϤāĻŋāϝāĻŧāĻž āĻāĻŋāύā§āύ āĻāĻā§āĻāϤāĻžāϤ āĻŦāϤāĻžāĻš āĻāĻŋāύā§āύ āĻĻāĻŋāĻļā§ āĻŦāĻž āĻāϤāĻŋā§°ā§ āĻŦāϝāĻŧāĨ¤
5. Wind shear creates what type of spinning air ? : āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§°ā§ āĻā§āύā§āϧ⧰āĻŖā§° āĻā§ā§°āĻŖā§āϝāĻŧāĻž āĻŦāĻžāϝāĻŧā§ āϏā§āώā§āĻāĻŋ āĻā§°ā§ ?
A) Vertical spinning | āĻāϞāĻŽā§āĻŦ āĻā§ā§°āĻŖāĻŋ B) Horizontal spinning | āĻ āύā§āĻā§āĻŽāĻŋāĻ āĻā§ā§°āĻŖāĻŋ C) Circular storm | āĻā§āϞāĻžāĻāĻžāϰ āĻāĻĄāĻŧ D) Dust storm | āϧā§āϞāĻŋ āĻāĻĄāĻŧ
Ans: B) Horizontal spinning | āĻ
āύā§āĻā§āĻŽāĻŋāĻ āĻā§ā§°āĻŖāĻŋ
Explanation: Wind shear forms a horizontal rotating tube of air in the atmosphere. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§°ā§ āĻŦāĻžāϝāĻŧā§āĻŽāĻŖā§āĻĄāϞāϤ āĻ
āύā§āĻā§āĻŽāĻŋāĻ āĻā§ā§°āĻŖā§āϝāĻŧāĻž āĻŦāĻžāϝāĻŧā§ā§° āύāϞāĻž āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤
6. What changes the horizontal spin into a vertical tornado ? : āĻ āύā§āĻā§āĻŽāĻŋāĻ āĻā§ā§°āĻŖāĻŋāĻ āĻāϞāĻŽā§āĻŦ āĻā§°ā§āĻŖā§āĻĄā§āϤ āĻā§āύ⧠āĻĒā§°āĻŋāĻŖāϤ āĻā§°ā§ ?
A) Rain | āĻŦā§°āώā§āĻŖ B) Rising warm air | āĻāĻĒā§°āϞ⧠āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ C) Clouds | āĻĄāĻžā§ąā§° D) Lightning | āĻŦāĻā§ā§°āĻĒāĻžāϤ
Ans: B) Rising warm air | āĻāĻĒā§°āϞ⧠āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§
Explanation: Rising warm air tilts the spinning air vertically and forms a tornado funnel. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻĒā§°āϞ⧠āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§āϝāĻŧā§ āĻā§ā§°āĻŖāĻŋ āĻĨāĻāĻž āĻŦāĻžāϝāĻŧā§āĻ āĻāϞāĻŽā§āĻŦ āĻā§°āĻŋ āĻā§°ā§āĻŖā§āĻĄā§ āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤
7. What shape does a tornado usually have ? : āĻā§°ā§āĻŖā§āĻĄā§ā§° āϏāĻžāϧāĻžā§°āĻŖāϤ⧠āĻāĻŋ āĻāĻā§āϤāĻŋ āĻĨāĻžāĻā§ ?
A) Square | āĻŦā§°ā§āĻāĻžāĻā§āϤāĻŋ B) Funnel | āĻĢāĻžāύā§āϞ āĻāĻā§āϤāĻŋ C) Triangle | āϤā§ā§°āĻŋāĻā§āĻ D) Oval | āĻĄāĻŋāĻŽā§āĻŦāĻžāĻā§āϤāĻŋ
Ans: B) Funnel | āĻĢāĻžāύā§āϞ āĻāĻā§āϤāĻŋ
Explanation: Tornadoes usually appear as a rotating funnel-shaped cloud. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻā§°ā§āĻŖā§āĻĄā§ āϏāĻžāϧāĻžā§°āĻŖāϤ⧠āĻā§ā§°āĻŖā§āϝāĻŧāĻž āĻĢāĻžāύā§āϞ āĻāĻā§āϤāĻŋā§° āĻĄāĻžā§ąā§°ā§° āĻĻā§°ā§ āĻĻā§āĻāĻž āϝāĻžāϝāĻŧāĨ¤
8. Tornado rotation is mainly caused by which two factors ? : āĻā§°ā§āĻŖā§āĻĄā§ā§° āĻā§ā§°āĻŖāĻŋ āĻŽā§āϞāϤ āĻā§āύ āĻĻā§āĻāĻž āĻāĻžā§°āĻŖāϤ āĻšāϝāĻŧ ?
A) Rain & clouds | āĻŦā§°āώā§āĻŖ āĻā§°ā§ āĻĄāĻžā§ąā§° B) Rising air & wind shear | āĻāĻ āĻž āĻŦāĻžāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§° C) Snow & wind | āϤā§āώāĻžā§° āĻā§°ā§ āĻŦāϤāĻžāĻš D) Sunlight & heat | āϏā§ā§°ā§āϝ⧰ āĻĒā§āĻšā§° āĻā§°ā§ āϤāĻžāĻĒ
Ans: B) Rising air & wind shear | āĻāĻ āĻž āĻŦāĻžāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§°
Explanation: Rising warm air and wind shear together create strong rotation needed for a tornado. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§°ā§ āĻŽāĻŋāϞāĻŋ āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻā§ā§°āĻŖāĻŋ āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤
9. Tornadoes are mainly studied in which science field ? : āĻā§°ā§āĻŖā§āĻĄā§ āĻŽā§āϞāϤ āĻā§āύ āĻŦāĻŋāĻā§āĻāĻžāύāϤ āĻ āϧā§āϝāϝāĻŧāύ āĻā§°āĻž āĻšāϝāĻŧ ?
A) Biology | āĻā§ā§ąāĻŦāĻŋāĻā§āĻāĻžāύ B) Meteorology | āĻāĻŦāĻšāĻžāĻāϝāĻŧāĻž āĻŦāĻŋāĻā§āĻāĻžāύ C) Chemistry | ā§°āϏāĻžāϝāĻŧāύ D) Botany | āĻāĻĻā§āĻāĻŋāĻĻāĻŦāĻŋāĻā§āĻāĻžāύ
Ans: B) Meteorology | āĻāĻŦāĻšāĻžāĻāϝāĻŧāĻž āĻŦāĻŋāĻā§āĻāĻžāύ
Explanation: Meteorology is the study of weather events like storms and tornadoes. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŦāĻšāĻžāĻāϝāĻŧāĻž āĻŦāĻŋāĻā§āĻāĻžāύ⧠āĻāĻĄāĻŧ āĻā§°ā§ āĻā§°ā§āĻŖā§āĻĄā§ā§° āĻĻā§°ā§ āĻŦāϤ⧰⧰ āĻāĻāύāĻžāĻŦā§ā§° āĻ
āϧā§āϝāϝāĻŧāύ āĻā§°ā§āĨ¤
10. What is the key reason tornadoes spin ? : āĻā§°ā§āĻŖā§āĻĄā§ āĻā§ā§°āĻŖāĻŋā§° āĻŽā§āϞ āĻāĻžā§°āĻŖ āĻāĻŋ ?
A) Heavy rain | āĻ āϧāĻŋāĻ āĻŦā§°āώā§āĻŖ B) Rising warm air & wind shear | āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§° C) Lightning | āĻŦāĻā§ā§°āĻĒāĻžāϤ D) Cold clouds | āĻ āĻžāĻŖā§āĻĄāĻž āĻĄāĻžā§ąā§°
Ans: B) Rising warm air & wind shear | āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§°
Explanation: The combination of rising warm air and wind shear produces the spinning motion of tornadoes.
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻ āĻž āĻā§°āĻŽ āĻŦāĻžāϝāĻŧā§ āĻā§°ā§ āĻāĻāĻŖā§āĻĄ āĻļāĻŋāϝāĻŧāĻžā§°ā§° āĻŽāĻŋāϞāύ⧰ āĻĢāϞāϤā§āĻ āĻā§°ā§āĻŖā§āĻĄā§ā§° āĻā§ā§°āĻŖāĻŋ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧāĨ¤