Why Do Ice Cubes Stick to Your Tongue ? : āĻŦā§°āĻĢ⧇ āϜāĻŋāĻ­āĻžāϤ āĻ•āĻŋāϝāĻŧ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇ ?


1. Ice is Very Cold : āĻŦā§°āĻĢ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž



  • Ice is much colder than our body temperature. : āĻŦā§°āĻĢ āφāĻŽāĻžā§° āĻļ⧰⧀⧰⧰ āϤāĻžāĻĒāϤāĻ•ā§ˆ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻžāĨ¤

  • When it touches the tongue, it quickly removes heat. : āχ āϜāĻŋāĻ­āĻžā§° āϞāĻ—āϤ āϞāĻžāĻ—āĻŋāϞ⧇ āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āϤāĻžāĻĒ āφāρāϤ⧰āĻžāχ āĻĻāĻŋāϝāĻŧ⧇āĨ¤


2. Moisture on the Tongue : āϜāĻŋāĻ­āĻžāϤ āφāĻ°ā§āĻĻā§ā§°āϤāĻž āĻĨāĻžāϕ⧇



  • The surface of the tongue has moisture (water). : āϜāĻŋāĻ­āĻžā§° āĻ“āĻĒā§°āϤ āφāĻ°ā§āĻĻā§ā§°āϤāĻž āĻŦāĻž āĻĒāĻžāύ⧀ āĻĨāĻžāϕ⧇āĨ¤


3. Heat Leaves the Tongue : āϜāĻŋāĻ­āĻžā§° āĻĒā§°āĻž āϤāĻžāĻĒ āĻ“āϞāĻžāχ āϝāĻžāϝāĻŧ



  • When ice touches the tongue, heat quickly leaves the tongue and goes to the ice. : āĻŦā§°āĻĢ āϜāĻŋāĻ­āĻžāϤ āϞāĻžāĻ—āĻŋāϞ⧇ āϜāĻŋāĻ­āĻžā§° āϤāĻžāĻĒ āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āĻŦā§°āĻĢāϞ⧈ āϝāĻžāϝāĻŧāĨ¤


4. Moisture Freezes : āφāĻ°ā§āĻĻā§ā§°āϤāĻž āϜāĻŽāĻŋ āϝāĻžāϝāĻŧ



  • Because of the sudden cooling, the moisture on the tongue freezes. : āĻšāĻ āĻžāϤ⧇ āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§‹ā§ąāĻžā§° āĻŦāĻžāĻŦ⧇ āϜāĻŋāĻ­āĻžā§° āφāĻ°ā§āĻĻā§ā§°āϤāĻž āϜāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤


5. Ice Sticks to the Tongue : āĻŦā§°āĻĢ āϜāĻŋāĻ­āĻžāϤ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇



  • The frozen moisture forms a thin layer of ice, which makes the ice cube stick for a short time. : āϜāĻŽāĻž āφāĻ°ā§āĻĻā§ā§°āϤāĻžāχ āĻĒāĻžāϤāϞ āĻŦā§°āĻĢā§° āĻ¸ā§āϤ⧰ āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰⧇, āφ⧰⧁ āϤāĻžā§° āĻŦāĻžāĻŦ⧇ āĻŦā§°āĻĢ āĻ•āĻŋāϛ⧁ āϏāĻŽāϝāĻŧā§° āĻŦāĻžāĻŦ⧇ āϜāĻŋāĻ­āĻžāϤ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇āĨ¤


Key Point | āĻŽā§‚āϞ āĻ•āĻĨāĻž
Ice sticks to the tongue because the moisture on the tongue freezes instantly when it touches very cold ice.


āĻŦā§°āĻĢ āϜāĻŋāĻ­āĻžāϤ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇ āĻ•āĻžā§°āĻŖ āϜāĻŋāĻ­āĻžā§° āφāĻ°ā§āĻĻā§ā§°āϤāĻž āĻ āĻžāĻŖā§āĻĄāĻž āĻŦā§°āĻĢā§° āϞāĻ—āϤ āϞāĻžāĻ—āĻŋ āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āϜāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤


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MCQ


Q1. Why does ice feel very cold to our body ? : āĻŦā§°āĻĢ āφāĻŽāĻžā§° āĻļ⧰⧀⧰āϤ āĻ•āĻŋāϝāĻŧ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž āϞāĻžāϗ⧇ ?
(a) Because it has high temperature | āωāĻšā§āϚ āϤāĻžāĻĒ āφāϛ⧇ (b) Because its temperature is very low | āϤāĻžāĻĒāĻŽāĻžāύ āĻ…āϤāĻŋ āĻ•āĻŽ (c) Because it is heavy | āχ āĻ­āĻžā§°ā§€ (d) Because it is dry | āχ āĻļ⧁āĻ•āĻžāύ


Ans: (b) Because its temperature is very low : āϤāĻžāĻĒāĻŽāĻžāύ āĻ…āϤāĻŋ āĻ•āĻŽ
Explanation: Ice has a much lower temperature than our body, so it feels extremely cold.
āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻŦā§°āĻĢā§° āϤāĻžāĻĒāĻŽāĻžāύ āφāĻŽāĻžā§° āĻļ⧰⧀⧰āϤāĻ•ā§ˆ āĻŦāĻšā§āϤ āĻ•āĻŽ, āϏ⧇āϝāĻŧ⧇ āχ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž āϞāĻžāϗ⧇āĨ¤


Q2. What is present on the surface of the tongue ? : āϜāĻŋāĻ­āĻžā§° āĻ“āĻĒā§°āϤ āĻ•āĻŋ āĻĨāĻžāϕ⧇ ?
(a) Dust | āϧ⧂āϞāĻŋ (b) Moisture | āφāĻ°ā§āĻĻā§ā§°āϤāĻž (c) Oil | āϤ⧇āϞ (d) Sand | āĻŦāĻžāϞāĻŋ


Ans: (b) Moisture : āφāĻ°ā§āĻĻā§ā§°āϤāĻž
Explanation: The tongue surface contains moisture (water). āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āϜāĻŋāĻ­āĻžā§° āĻ“āĻĒā§°āϤ āφāĻ°ā§āĻĻā§ā§°āϤāĻž āĻŦāĻž āĻĒāĻžāύ⧀ āĻĨāĻžāϕ⧇āĨ¤


Q3. What happens when ice touches the tongue ? : āĻŦā§°āĻĢ āϜāĻŋāĻ­āĻžāϤ āϞāĻžāĻ—āĻŋāϞ⧇ āĻ•āĻŋ āĻšāϝāĻŧ ?
(a) Heat moves from ice to tongue | āϤāĻžāĻĒ āĻŦā§°āĻĢā§° āĻĒā§°āĻž āϜāĻŋāĻ­āĻžāϞ⧈ āϝāĻžāϝāĻŧ (b) Heat leaves the tongue | āϜāĻŋāĻ­āĻžā§° āĻĒā§°āĻž āϤāĻžāĻĒ āĻ“āϞāĻžāχ āϝāĻžāϝāĻŧ (c) Nothing happens | āĻāϕ⧋ āύāĻšāϝāĻŧ (d) Tongue becomes hot | āϜāĻŋāĻ­āĻž āĻ—ā§°āĻŽ āĻšāϝāĻŧ


Ans: (b) Heat leaves the tongue : āϜāĻŋāĻ­āĻžā§° āĻĒā§°āĻž āϤāĻžāĻĒ āĻ“āϞāĻžāχ āϝāĻžāϝāĻŧ
Explanation: Heat quickly leaves the tongue and goes into the ice. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āϜāĻŋāĻ­āĻžā§° āϤāĻžāĻĒ āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āĻŦā§°āĻĢāϞ⧈ āϝāĻžāϝāĻŧāĨ¤


Q4. What happens to the moisture on the tongue when it touches ice ? : āĻŦā§°āĻĢ āϞāĻžāĻ—āĻŋāϞ⧇ āϜāĻŋāĻ­āĻžā§° āφāĻ°ā§āĻĻā§ā§°āϤāĻžā§° āĻ•āĻŋ āĻšāϝāĻŧ ?
(a) It evaporates | āĻŦāĻžāĻˇā§āĻĒā§€āĻ­ā§ąāύ āĻšāϝāĻŧ (b) It freezes | āϜāĻŽāĻŋ āϝāĻžāϝāĻŧ (c) It disappears | āύāĻžāχāĻ•āĻŋāϝāĻŧāĻž āĻšāϝāĻŧ (d) It becomes hot | āĻ—ā§°āĻŽ āĻšāϝāĻŧ


Ans: (b) It freezes : āϜāĻŽāĻŋ āϝāĻžāϝāĻŧ
Explanation: The moisture freezes due to the sudden cooling. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻšāĻ āĻžāϤ⧇ āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§‹ā§ąāĻžā§° āĻŦāĻžāĻŦ⧇ āφāĻ°ā§āĻĻā§ā§°āϤāĻž āϜāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤


Q5. Why does the ice cube stick to the tongue ?:āĻŦā§°āĻĢā§° āϟ⧁āϕ⧁⧰āĻž āϜāĻŋāĻ­āĻžāϤ āĻ•āĻŋāϝāĻŧ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇ ?
(a) Because of frozen moisture | āϜāĻŽāĻž āφāĻ°ā§āĻĻā§ā§°āϤāĻžā§° āĻŦāĻžāĻŦ⧇ (b) Because of sunlight | āĻ¸ā§‚ā§°ā§āϝ⧰ āĻĒā§‹āĻšā§°ā§° āĻŦāĻžāĻŦ⧇ (c) Because of air | āĻŦāĻžāϝāĻŧ⧁⧰ āĻŦāĻžāĻŦ⧇ (d) Because of gravity | āĻŽāĻžāĻ§ā§āϝāĻžāĻ•āĻ°ā§āώāĻŖā§° āĻŦāĻžāĻŦ⧇


Ans: (a) Because of frozen moisture : āϜāĻŽāĻž āφāĻ°ā§āĻĻā§ā§°āϤāĻžā§° āĻŦāĻžāĻŦ⧇
Explanation: Frozen moisture forms a thin ice layer that sticks the ice to the tongue.
āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āϜāĻŽāĻž āφāĻ°ā§āĻĻā§ā§°āϤāĻžāχ āĻĒāĻžāϤāϞ āĻŦā§°āĻĢā§° āĻ¸ā§āϤ⧰ āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰⧇ āφ⧰⧁ āĻŦā§°āĻĢ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇āĨ¤


Q6. Which body part is discussed in this experiment ? : āĻāχ āϘāϟāύāĻžāϤ āϕ⧋āύ āĻļ⧰⧀⧰⧰ āĻ…āĻ‚āĻļ āωāĻ˛ā§āϞ⧇āĻ– āϕ⧰āĻž āĻšā§ˆāϛ⧇ ?
(a) Nose | āύāĻžāĻ• (b) Tongue | āϜāĻŋāĻ­āĻž (c) Ear | āĻ•āĻžāĻŖ (d) Eye | āϚāϕ⧁


Ans: (b) Tongue : āϜāĻŋāĻ­āĻž
Explanation: The sticking effect happens on the tongue surface. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻāχ āϘāϟāύāĻžāĻŸā§‹ āϜāĻŋāĻ­āĻžā§° āĻ“āĻĒā§°āϤ āϘāĻŸā§‡āĨ¤


Q7. What causes the freezing of moisture ? : āφāĻ°ā§āĻĻā§ā§°āϤāĻž āϜāĻŽāĻžā§° āĻ•āĻžā§°āĻŖ āĻ•āĻŋ ?
(a) Heat gain | āϤāĻžāĻĒ āϞāĻžāĻ­ (b) Rapid heat loss | āϤāĻžāĻĒ āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āĻ“āϞāĻžāχ āĻ¯ā§‹ā§ąāĻž (c) Air pressure | āĻŦāĻžāϝāĻŧ⧁⧰ āϚāĻžāĻĒ (d) Light | āĻĒā§‹āĻšā§°


Ans: (b) Rapid heat loss : āϤāĻžāĻĒ āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āĻ“āϞāĻžāχ āĻ¯ā§‹ā§ąāĻž
Explanation: Heat quickly leaves the tongue, causing the moisture to freeze. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āϜāĻŋāĻ­āĻžā§° āϤāĻžāĻĒ āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āĻ“āϞāĻžāχ āĻ¯ā§‹ā§ąāĻžāϤ āφāĻ°ā§āĻĻā§ā§°āϤāĻž āϜāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤


Q8. How long does the ice stick to the tongue ? : āĻŦā§°āĻĢ āϜāĻŋāĻ­āĻžāϤ āĻ•āĻŋāĻŽāĻžāύ āϏāĻŽāϝāĻŧ āĻĨāĻžāϕ⧇ ?
(a) Forever | āϏāĻĻāĻžāϝāĻŧ (b) A short time | āĻ•āĻŋāϛ⧁ āϏāĻŽāϝāĻŧ (c) One hour | āĻāĻ• āϘāĻŖā§āϟāĻž (d) One day | āĻāĻ• āĻĻāĻŋāύ


Ans: (b) A short time : āĻ•āĻŋāϛ⧁ āϏāĻŽāϝāĻŧ
Explanation: The ice sticks only temporarily until the frozen layer melts. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āϜāĻŽāĻž āĻ¸ā§āϤ⧰ āĻ—āϞāĻžā§° āφāĻ—āϞ⧈āϕ⧇ āĻŦā§°āĻĢ āĻ•āĻŋāϛ⧁ āϏāĻŽāϝāĻŧā§° āĻŦāĻžāĻŦ⧇ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇āĨ¤


Q9. Which property of ice causes the sticking effect ? : āĻŦā§°āĻĢā§° āϕ⧋āύ āϗ⧁āϪ⧇ āϞāĻžāĻ—āĻŋ āĻĨāĻ•āĻž āϘāϟāύāĻžāĻŸā§‹ āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰⧇ ?
(a) Its cold temperature | āχāϝāĻŧāĻžā§° āĻ āĻžāĻŖā§āĻĄāĻž āϤāĻžāĻĒāĻŽāĻžāύ (b) Its color | ā§°āĻ‚ (c) Its shape | āφāĻ•āĻžā§° (d) Its smell | āĻ—āĻ¨ā§āϧ


Ans: (a) Its cold temperature : āχāϝāĻŧāĻžā§° āĻ āĻžāĻŖā§āĻĄāĻž āϤāĻžāĻĒāĻŽāĻžāύ
Explanation: Extremely cold ice causes moisture to freeze instantly. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ…āĻ¤ā§āϝāĻ¨ā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž āĻŦā§°āĻĢ⧇ āφāĻ°ā§āĻĻā§ā§°āϤāĻžāĻ• āĻ¤ā§ŽāĻ•ā§āώāĻŖāĻžā§Ž āϜāĻŽāĻžāχāĨ¤


Q10. What is the main reason ice sticks to the tongue ? : āĻŦā§°āĻĢ āϜāĻŋāĻ­āĻžāϤ āϞāĻžāĻ—āĻŋ āĻĨāĻ•āĻžā§° āĻŽā§āĻ–ā§āϝ āĻ•āĻžā§°āĻŖ āĻ•āĻŋ ?
(a) Gravity | āĻŽāĻžāĻ§ā§āϝāĻžāĻ•āĻ°ā§āώāĻŖ (b) Frozen moisture layer | āϜāĻŽāĻž āφāĻ°ā§āĻĻā§ā§°āϤāĻžā§° āĻ¸ā§āϤ⧰ (c) Air pressure | āĻŦāĻžāϝāĻŧ⧁⧰ āϚāĻžāĻĒ (d) Sunlight | āĻ¸ā§‚ā§°ā§āϝ⧰ āĻĒā§‹āĻšā§°


Ans: (b) Frozen moisture layer : āϜāĻŽāĻž āφāĻ°ā§āĻĻā§ā§°āϤāĻžā§° āĻ¸ā§āϤ⧰
Explanation: The moisture freezes into a thin layer of ice, making the cube stick. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āφāĻ°ā§āĻĻā§ā§°āϤāĻž āϜāĻŽāĻŋ āĻĒāĻžāϤāϞ āĻŦā§°āĻĢā§° āĻ¸ā§āϤ⧰ āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰⧇, āϝāĻžā§° āĻŦāĻžāĻŦ⧇ āĻŦā§°āĻĢ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇āĨ¤