Why Do Ice Cubes Stick to Your Tongue ? : āĻŦā§°āĻĢā§ āĻāĻŋāĻāĻžāϤ āĻāĻŋāϝāĻŧ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§ ?
1. Ice is Very Cold : āĻŦā§°āĻĢ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž
- Ice is much colder than our body temperature. : āĻŦā§°āĻĢ āĻāĻŽāĻžā§° āĻļā§°ā§ā§°ā§° āϤāĻžāĻĒāϤāĻā§ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻžāĨ¤
- When it touches the tongue, it quickly removes heat. : āĻ āĻāĻŋāĻāĻžā§° āϞāĻāϤ āϞāĻžāĻāĻŋāϞ⧠āϤā§āĻā§āώāĻŖāĻžā§ āϤāĻžāĻĒ āĻāĻāϤ⧰āĻžāĻ āĻĻāĻŋāϝāĻŧā§āĨ¤
2. Moisture on the Tongue : āĻāĻŋāĻāĻžāϤ āĻāϰā§āĻĻā§ā§°āϤāĻž āĻĨāĻžāĻā§
- The surface of the tongue has moisture (water). : āĻāĻŋāĻāĻžā§° āĻāĻĒā§°āϤ āĻāϰā§āĻĻā§ā§°āϤāĻž āĻŦāĻž āĻĒāĻžāύ⧠āĻĨāĻžāĻā§āĨ¤
3. Heat Leaves the Tongue : āĻāĻŋāĻāĻžā§° āĻĒā§°āĻž āϤāĻžāĻĒ āĻāϞāĻžāĻ āϝāĻžāϝāĻŧ
- When ice touches the tongue, heat quickly leaves the tongue and goes to the ice. : āĻŦā§°āĻĢ āĻāĻŋāĻāĻžāϤ āϞāĻžāĻāĻŋāϞ⧠āĻāĻŋāĻāĻžā§° āϤāĻžāĻĒ āϤā§āĻā§āώāĻŖāĻžā§ āĻŦā§°āĻĢāϞ⧠āϝāĻžāϝāĻŧāĨ¤
4. Moisture Freezes : āĻāϰā§āĻĻā§ā§°āϤāĻž āĻāĻŽāĻŋ āϝāĻžāϝāĻŧ
- Because of the sudden cooling, the moisture on the tongue freezes. : āĻšāĻ āĻžāϤ⧠āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§ā§ąāĻžā§° āĻŦāĻžāĻŦā§ āĻāĻŋāĻāĻžā§° āĻāϰā§āĻĻā§ā§°āϤāĻž āĻāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤
5. Ice Sticks to the Tongue : āĻŦā§°āĻĢ āĻāĻŋāĻāĻžāϤ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§
- The frozen moisture forms a thin layer of ice, which makes the ice cube stick for a short time. : āĻāĻŽāĻž āĻāϰā§āĻĻā§ā§°āϤāĻžāĻ āĻĒāĻžāϤāϞ āĻŦā§°āĻĢā§° āϏā§āϤ⧰ āϏā§āώā§āĻāĻŋ āĻā§°ā§, āĻā§°ā§ āϤāĻžā§° āĻŦāĻžāĻŦā§ āĻŦā§°āĻĢ āĻāĻŋāĻā§ āϏāĻŽāϝāĻŧā§° āĻŦāĻžāĻŦā§ āĻāĻŋāĻāĻžāϤ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§āĨ¤
Key Point | āĻŽā§āϞ āĻāĻĨāĻž
Ice sticks to the tongue because the moisture on the tongue freezes instantly when it touches very cold ice.
āĻŦā§°āĻĢ āĻāĻŋāĻāĻžāϤ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§ āĻāĻžā§°āĻŖ āĻāĻŋāĻāĻžā§° āĻāϰā§āĻĻā§ā§°āϤāĻž āĻ āĻžāĻŖā§āĻĄāĻž āĻŦā§°āĻĢā§° āϞāĻāϤ āϞāĻžāĻāĻŋ āϤā§āĻā§āώāĻŖāĻžā§ āĻāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤
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MCQ
Q1. Why does ice feel very cold to our body ? : āĻŦā§°āĻĢ āĻāĻŽāĻžā§° āĻļā§°ā§ā§°āϤ āĻāĻŋāϝāĻŧ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž āϞāĻžāĻā§ ?
(a) Because it has high temperature | āĻāĻā§āĻ āϤāĻžāĻĒ āĻāĻā§ (b) Because its temperature is very low | āϤāĻžāĻĒāĻŽāĻžāύ āĻ
āϤāĻŋ āĻāĻŽ (c) Because it is heavy | āĻ āĻāĻžā§°ā§ (d) Because it is dry | āĻ āĻļā§āĻāĻžāύ
Ans: (b) Because its temperature is very low : āϤāĻžāĻĒāĻŽāĻžāύ āĻ
āϤāĻŋ āĻāĻŽ
Explanation: Ice has a much lower temperature than our body, so it feels extremely cold.
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŦā§°āĻĢā§° āϤāĻžāĻĒāĻŽāĻžāύ āĻāĻŽāĻžā§° āĻļā§°ā§ā§°āϤāĻā§ āĻŦāĻšā§āϤ āĻāĻŽ, āϏā§āϝāĻŧā§ āĻ āĻŦāĻšā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž āϞāĻžāĻā§āĨ¤
Q2. What is present on the surface of the tongue ? : āĻāĻŋāĻāĻžā§° āĻāĻĒā§°āϤ āĻāĻŋ āĻĨāĻžāĻā§ ?
(a) Dust | āϧā§āϞāĻŋ (b) Moisture | āĻāϰā§āĻĻā§ā§°āϤāĻž (c) Oil | āϤā§āϞ (d) Sand | āĻŦāĻžāϞāĻŋ
Ans: (b) Moisture : āĻāϰā§āĻĻā§ā§°āϤāĻž
Explanation: The tongue surface contains moisture (water). āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŋāĻāĻžā§° āĻāĻĒā§°āϤ āĻāϰā§āĻĻā§ā§°āϤāĻž āĻŦāĻž āĻĒāĻžāύ⧠āĻĨāĻžāĻā§āĨ¤
Q3. What happens when ice touches the tongue ? : āĻŦā§°āĻĢ āĻāĻŋāĻāĻžāϤ āϞāĻžāĻāĻŋāϞ⧠āĻāĻŋ āĻšāϝāĻŧ ?
(a) Heat moves from ice to tongue | āϤāĻžāĻĒ āĻŦā§°āĻĢā§° āĻĒā§°āĻž āĻāĻŋāĻāĻžāϞ⧠āϝāĻžāϝāĻŧ (b) Heat leaves the tongue | āĻāĻŋāĻāĻžā§° āĻĒā§°āĻž āϤāĻžāĻĒ āĻāϞāĻžāĻ āϝāĻžāϝāĻŧ (c) Nothing happens | āĻāĻā§ āύāĻšāϝāĻŧ (d) Tongue becomes hot | āĻāĻŋāĻāĻž āĻā§°āĻŽ āĻšāϝāĻŧ
Ans: (b) Heat leaves the tongue : āĻāĻŋāĻāĻžā§° āĻĒā§°āĻž āϤāĻžāĻĒ āĻāϞāĻžāĻ āϝāĻžāϝāĻŧ
Explanation: Heat quickly leaves the tongue and goes into the ice. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŋāĻāĻžā§° āϤāĻžāĻĒ āϤā§āĻā§āώāĻŖāĻžā§ āĻŦā§°āĻĢāϞ⧠āϝāĻžāϝāĻŧāĨ¤
Q4. What happens to the moisture on the tongue when it touches ice ? : āĻŦā§°āĻĢ āϞāĻžāĻāĻŋāϞ⧠āĻāĻŋāĻāĻžā§° āĻāϰā§āĻĻā§ā§°āϤāĻžā§° āĻāĻŋ āĻšāϝāĻŧ ?
(a) It evaporates | āĻŦāĻžāώā§āĻĒā§āĻā§ąāύ āĻšāϝāĻŧ (b) It freezes | āĻāĻŽāĻŋ āϝāĻžāϝāĻŧ (c) It disappears | āύāĻžāĻāĻāĻŋāϝāĻŧāĻž āĻšāϝāĻŧ (d) It becomes hot | āĻā§°āĻŽ āĻšāϝāĻŧ
Ans: (b) It freezes : āĻāĻŽāĻŋ āϝāĻžāϝāĻŧ
Explanation: The moisture freezes due to the sudden cooling. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻšāĻ āĻžāϤ⧠āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§ā§ąāĻžā§° āĻŦāĻžāĻŦā§ āĻāϰā§āĻĻā§ā§°āϤāĻž āĻāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤
Q5. Why does the ice cube stick to the tongue ?:āĻŦā§°āĻĢā§° āĻā§āĻā§ā§°āĻž āĻāĻŋāĻāĻžāϤ āĻāĻŋāϝāĻŧ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§ ?
(a) Because of frozen moisture | āĻāĻŽāĻž āĻāϰā§āĻĻā§ā§°āϤāĻžā§° āĻŦāĻžāĻŦā§ (b) Because of sunlight | āϏā§ā§°ā§āϝ⧰ āĻĒā§āĻšā§°ā§° āĻŦāĻžāĻŦā§ (c) Because of air | āĻŦāĻžāϝāĻŧā§ā§° āĻŦāĻžāĻŦā§ (d) Because of gravity | āĻŽāĻžāϧā§āϝāĻžāĻāϰā§āώāĻŖā§° āĻŦāĻžāĻŦā§
Ans: (a) Because of frozen moisture : āĻāĻŽāĻž āĻāϰā§āĻĻā§ā§°āϤāĻžā§° āĻŦāĻžāĻŦā§
Explanation: Frozen moisture forms a thin ice layer that sticks the ice to the tongue.
āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŽāĻž āĻāϰā§āĻĻā§ā§°āϤāĻžāĻ āĻĒāĻžāϤāϞ āĻŦā§°āĻĢā§° āϏā§āϤ⧰ āϏā§āώā§āĻāĻŋ āĻā§°ā§ āĻā§°ā§ āĻŦā§°āĻĢ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§āĨ¤
Q6. Which body part is discussed in this experiment ? : āĻāĻ āĻāĻāύāĻžāϤ āĻā§āύ āĻļā§°ā§ā§°ā§° āĻ
āĻāĻļ āĻāϞā§āϞā§āĻ āĻā§°āĻž āĻšā§āĻā§ ?
(a) Nose | āύāĻžāĻ (b) Tongue | āĻāĻŋāĻāĻž (c) Ear | āĻāĻžāĻŖ (d) Eye | āĻāĻā§
Ans: (b) Tongue : āĻāĻŋāĻāĻž
Explanation: The sticking effect happens on the tongue surface. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻ āĻāĻāύāĻžāĻā§ āĻāĻŋāĻāĻžā§° āĻāĻĒā§°āϤ āĻāĻā§āĨ¤
Q7. What causes the freezing of moisture ? : āĻāϰā§āĻĻā§ā§°āϤāĻž āĻāĻŽāĻžā§° āĻāĻžā§°āĻŖ āĻāĻŋ ?
(a) Heat gain | āϤāĻžāĻĒ āϞāĻžāĻ (b) Rapid heat loss | āϤāĻžāĻĒ āϤā§āĻā§āώāĻŖāĻžā§ āĻāϞāĻžāĻ āϝā§ā§ąāĻž (c) Air pressure | āĻŦāĻžāϝāĻŧā§ā§° āĻāĻžāĻĒ (d) Light | āĻĒā§āĻšā§°
Ans: (b) Rapid heat loss : āϤāĻžāĻĒ āϤā§āĻā§āώāĻŖāĻžā§ āĻāϞāĻžāĻ āϝā§ā§ąāĻž
Explanation: Heat quickly leaves the tongue, causing the moisture to freeze. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŋāĻāĻžā§° āϤāĻžāĻĒ āϤā§āĻā§āώāĻŖāĻžā§ āĻāϞāĻžāĻ āϝā§ā§ąāĻžāϤ āĻāϰā§āĻĻā§ā§°āϤāĻž āĻāĻŽāĻŋ āϝāĻžāϝāĻŧāĨ¤
Q8. How long does the ice stick to the tongue ? : āĻŦā§°āĻĢ āĻāĻŋāĻāĻžāϤ āĻāĻŋāĻŽāĻžāύ āϏāĻŽāϝāĻŧ āĻĨāĻžāĻā§ ?
(a) Forever | āϏāĻĻāĻžāϝāĻŧ (b) A short time | āĻāĻŋāĻā§ āϏāĻŽāϝāĻŧ (c) One hour | āĻāĻ āĻāĻŖā§āĻāĻž (d) One day | āĻāĻ āĻĻāĻŋāύ
Ans: (b) A short time : āĻāĻŋāĻā§ āϏāĻŽāϝāĻŧ
Explanation: The ice sticks only temporarily until the frozen layer melts. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŽāĻž āϏā§āϤ⧰ āĻāϞāĻžā§° āĻāĻāϞā§āĻā§ āĻŦā§°āĻĢ āĻāĻŋāĻā§ āϏāĻŽāϝāĻŧā§° āĻŦāĻžāĻŦā§ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§āĨ¤
Q9. Which property of ice causes the sticking effect ? : āĻŦā§°āĻĢā§° āĻā§āύ āĻā§āĻŖā§ āϞāĻžāĻāĻŋ āĻĨāĻāĻž āĻāĻāύāĻžāĻā§ āϏā§āώā§āĻāĻŋ āĻā§°ā§ ?
(a) Its cold temperature | āĻāϝāĻŧāĻžā§° āĻ āĻžāĻŖā§āĻĄāĻž āϤāĻžāĻĒāĻŽāĻžāύ (b) Its color | ā§°āĻ (c) Its shape | āĻāĻāĻžā§° (d) Its smell | āĻāύā§āϧ
Ans: (a) Its cold temperature : āĻāϝāĻŧāĻžā§° āĻ āĻžāĻŖā§āĻĄāĻž āϤāĻžāĻĒāĻŽāĻžāύ
Explanation: Extremely cold ice causes moisture to freeze instantly. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻ
āϤā§āϝāύā§āϤ āĻ āĻžāĻŖā§āĻĄāĻž āĻŦā§°āĻĢā§ āĻāϰā§āĻĻā§ā§°āϤāĻžāĻ āϤā§āĻā§āώāĻŖāĻžā§ āĻāĻŽāĻžāĻāĨ¤
Q10. What is the main reason ice sticks to the tongue ? : āĻŦā§°āĻĢ āĻāĻŋāĻāĻžāϤ āϞāĻžāĻāĻŋ āĻĨāĻāĻžā§° āĻŽā§āĻā§āϝ āĻāĻžā§°āĻŖ āĻāĻŋ ?
(a) Gravity | āĻŽāĻžāϧā§āϝāĻžāĻāϰā§āώāĻŖ (b) Frozen moisture layer | āĻāĻŽāĻž āĻāϰā§āĻĻā§ā§°āϤāĻžā§° āϏā§āϤ⧰ (c) Air pressure | āĻŦāĻžāϝāĻŧā§ā§° āĻāĻžāĻĒ (d) Sunlight | āϏā§ā§°ā§āϝ⧰ āĻĒā§āĻšā§°
Ans: (b) Frozen moisture layer : āĻāĻŽāĻž āĻāϰā§āĻĻā§ā§°āϤāĻžā§° āϏā§āϤ⧰
Explanation: The moisture freezes into a thin layer of ice, making the cube stick. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāϰā§āĻĻā§ā§°āϤāĻž āĻāĻŽāĻŋ āĻĒāĻžāϤāϞ āĻŦā§°āĻĢā§° āϏā§āϤ⧰ āϏā§āώā§āĻāĻŋ āĻā§°ā§, āϝāĻžā§° āĻŦāĻžāĻŦā§ āĻŦā§°āĻĢ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§āĨ¤