Why Do Raindrops Form in Clouds ? : āĻŽā§āĻāĻ¤ āĻŦā§°āĻˇā§āĻŖā§° āĻā§āĻĒāĻž āĻāĻŋāĻ¯āĻŧ āĻ¸ā§āĻˇā§āĻāĻŋ āĻšāĻ¯āĻŧ ?
1. Water Vapor in the Air : āĻŦāĻžāĻ¯āĻŧā§āĻ¤ āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ
- Warm air carries water vapor high into the sky. : āĻā§°āĻŽ āĻŦāĻžāĻ¯āĻŧā§āĻ¤ āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ āĻĨāĻžāĻā§āĨ¤
- This vapor rises and forms clouds. : āĻāĻ āĻŦāĻžāĻˇā§āĻĒ āĻāĻĒā§°āĻ˛ā§ āĻāĻ āĻŋ āĻŽā§āĻ āĻ¸ā§āĻˇā§āĻāĻŋ āĻā§°ā§āĨ¤
2. Cooling and Condensation : āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§ā§ąāĻž āĻā§°ā§ āĻ¸āĻāĻšāĻ¤āĻŋ (Condensation)
- High in the sky, the air becomes cooler. : āĻāĻĒā§°āĻ¤ āĻŦāĻžāĻ¯āĻŧā§ āĻ āĻžāĻŖā§āĻĄāĻž āĻšāĻ¯āĻŧāĨ¤
- Water vapor condenses into tiny droplets. : āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛ā§ āĻĒā§°āĻŋāĻŖāĻ¤ āĻšāĻ¯āĻŧ (Condensation)āĨ¤
3. Droplets Collide and Join : āĻā§āĻĒāĻžāĻŦā§ā§° āĻāĻā§āĻ˛āĻā§ āĻŽāĻŋāĻ˛āĻŋ āĻ¯āĻžāĻ¯āĻŧ
- The tiny droplets collide and combine with each other. : āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻŦā§ā§° āĻāĻāĻž āĻāĻ¨āĻā§ā§° āĻ˛āĻāĻ¤ āĻ§āĻžāĻā§āĻāĻž āĻāĻžāĻ āĻŽāĻŋāĻ˛āĻŋ āĻ¯āĻžāĻ¯āĻŧāĨ¤
- They slowly become bigger droplets. : āĻāĻ¯āĻŧāĻžā§° āĻĢāĻ˛āĻ¤ āĻĄāĻžāĻā§° āĻā§āĻĒāĻž āĻ¸ā§āĻˇā§āĻāĻŋ āĻšāĻ¯āĻŧāĨ¤
4. Droplets Become Heavy : āĻā§āĻĒāĻžāĻŦā§ā§° āĻāĻžā§°ā§ āĻšā§ āĻ¯āĻžāĻ¯āĻŧ
- As droplets grow larger, they become heavier. : āĻā§āĻĒāĻžāĻŦā§ā§° āĻĄāĻžāĻā§° āĻš'āĻ˛ā§ āĻāĻžā§°ā§ āĻšāĻ¯āĻŧāĨ¤
- The cloud cannot hold them anymore. : āĻŽā§āĻā§ āĻ¸ā§āĻāĻŦā§ā§° āĻ§ā§°āĻŋ ā§°āĻžāĻāĻŋāĻŦ āĻ¨ā§ā§ąāĻžā§°ā§āĨ¤
5. Rain Falls : āĻŦā§°āĻˇā§āĻŖ āĻĒā§°ā§
- When the droplets become too heavy, they fall to Earth as rain. : āĻā§āĻĒāĻžāĻŦā§ā§° āĻ āĻ¤ā§āĻ¯āĻ¨ā§āĻ¤ āĻāĻžā§°ā§ āĻš'āĻ˛ā§ āĻŦā§°āĻˇā§āĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻŽāĻžāĻāĻŋāĻ˛ā§ āĻĒā§°ā§āĨ¤
Key Point | āĻŽā§āĻ˛ āĻāĻĨāĻž
- Raindrops form when tiny cloud droplets combine and become heavy enough to fall.
- āĻŽā§āĻā§° āĻāĻŋāĻ¤ā§°āĻ¤ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻŦā§ā§° āĻŽāĻŋāĻ˛āĻŋ āĻĄāĻžāĻā§° āĻā§°ā§ āĻāĻžā§°ā§ āĻš’āĻ˛ā§ āĻ¸āĻŋāĻšāĻāĻ¤ āĻŦā§°āĻˇā§āĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻŽāĻžāĻāĻŋāĻ˛ā§ āĻĒā§°ā§āĨ¤
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MCQ
Q1. Where do raindrops form ? | āĻŦā§°āĻˇā§āĻŖā§° āĻā§āĻĒāĻž āĻ’āĻ¤ āĻ¸ā§āĻˇā§āĻāĻŋ āĻšāĻ¯āĻŧ ?
(a) In rivers | āĻ¨āĻĻā§āĻ¤ (b) In clouds | āĻŽā§āĻāĻ¤ (c) In soil | āĻŽāĻžāĻāĻŋāĻ¤ (d) In oceans | āĻ¸āĻžāĻā§°āĻ¤
Ans: (b) In clouds | āĻŽā§āĻāĻ¤
Explanation: Raindrops form inside clouds where water vapor condenses into tiny droplets.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŦā§°āĻˇā§āĻŖā§° āĻā§āĻĒāĻž āĻŽā§āĻā§° āĻāĻŋāĻ¤ā§°āĻ¤ āĻ¸ā§āĻˇā§āĻāĻŋ āĻšāĻ¯āĻŧ, āĻ¯’āĻ¤ āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛ā§ āĻĒā§°āĻŋāĻŖāĻ¤ āĻšāĻ¯āĻŧāĨ¤
Q2. Clouds contain tiny _____. | āĻŽā§āĻāĻ¤ āĻ¸ā§°ā§ _____ āĻĨāĻžāĻā§āĨ¤
(a) Stones | āĻĒāĻžāĻĨā§° (b) Water droplets | āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻž (c) Sand | āĻŦāĻžāĻ˛āĻŋ (d) Leaves | āĻĒāĻžāĻ¤āĻž
Ans: (b) Water droplets | āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻž
Explanation: Clouds are made of millions of tiny water droplets or ice crystals.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŽā§āĻ āĻ˛āĻžāĻ āĻ˛āĻžāĻ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻž āĻŦāĻž āĻŦā§°āĻĢā§° āĻāĻŖāĻžā§°ā§ āĻāĻ āĻŋāĻ¤āĨ¤
Q3. Warm air carries _____ upward. | āĻā§°āĻŽ āĻŦāĻžāĻ¯āĻŧā§ā§ąā§ āĻāĻĒā§°āĻ˛ā§ _____ āĻ˛ā§ āĻ¯āĻžāĻ¯āĻŧāĨ¤
(a) Dust | āĻ§ā§āĻ˛āĻŋ (b) Smoke | āĻ§ā§āĻā§ąāĻž (c) Water vapor | āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ (d) Ice | āĻŦā§°āĻĢ
Ans: (c) Water vapor | āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ
Explanation: Warm air rises and carries water vapor from oceans, rivers, and lakes into the sky.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻā§°āĻŽ āĻŦāĻžāĻ¯āĻŧā§ āĻāĻĒā§°āĻ˛ā§ āĻāĻ ā§ āĻā§°ā§ āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ āĻāĻāĻžāĻļāĻ˛ā§ āĻ˛ā§ āĻ¯āĻžāĻ¯āĻŧāĨ¤
Q4. When air cools, water vapor changes into _____. | āĻŦāĻžāĻ¯āĻŧā§ āĻ āĻžāĻŖā§āĻĄāĻž āĻš’āĻ˛ā§ āĻāĻ˛ā§āĻ¯āĻŧ āĻŦāĻžāĻˇā§āĻĒ _____ āĻšāĻ¯āĻŧāĨ¤
(a) Ice | āĻŦā§°āĻĢ (b) Tiny droplets | āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻž (c) Gas | āĻā§āĻ (d) Dust | āĻ§ā§āĻ˛āĻŋ
Ans: (b) Tiny droplets | āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻž
Explanation: Cooling causes condensation, changing vapor into tiny droplets.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŦāĻžāĻ¯āĻŧā§ āĻ āĻžāĻŖā§āĻĄāĻž āĻš’āĻ˛ā§ āĻ¸āĻāĻšāĻ¤āĻŋ (Condensation) āĻšāĻ¯āĻŧ āĻā§°ā§ āĻŦāĻžāĻˇā§āĻĒ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛ā§ āĻĒā§°āĻŋāĻŖāĻ¤ āĻšāĻ¯āĻŧāĨ¤
Q5. The process of vapor changing into droplets is called _____. | āĻŦāĻžāĻˇā§āĻĒ āĻā§āĻĒāĻžāĻ˛ā§ āĻĒā§°āĻŋāĻŖāĻ¤ āĻšā§ā§ąāĻžāĻ _____ āĻŦā§āĻ˛āĻŋ āĻā§ā§ąāĻž āĻšāĻ¯āĻŧāĨ¤
(a) Evaporation | āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ (b) Condensation | āĻ¸āĻāĻšāĻ¤āĻŋ (c) Freezing | āĻāĻŽāĻž (d) Melting | āĻāĻ˛āĻ¨
Ans: (b) Condensation | āĻ¸āĻāĻšāĻ¤āĻŋ
Explanation: Condensation occurs when water vapor cools and turns into liquid droplets.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻ¸āĻāĻšāĻ¤āĻŋ āĻš’āĻ˛ āĻŦāĻžāĻˇā§āĻĒ āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛ā§ āĻĒā§°āĻŋāĻŖāĻ¤ āĻšā§ā§ąāĻž āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻžāĨ¤
Q6. Small droplets become bigger by _____. | āĻ¸ā§°ā§ āĻā§āĻĒāĻžāĻŦā§ā§° āĻĄāĻžāĻā§° āĻšāĻ¯āĻŧ _____.
(a) Freezing | āĻāĻŽāĻž āĻšā§ (b) Colliding and joining | āĻ§āĻžāĻā§āĻāĻž āĻāĻžāĻ āĻŽāĻŋāĻ˛āĻŋ (c) Burning | āĻā§āĻŦāĻ˛āĻŋ (d) Breaking | āĻāĻžāĻāĻŋ
Ans: (b) Colliding and joining | āĻ§āĻžāĻā§āĻāĻž āĻāĻžāĻ āĻŽāĻŋāĻ˛āĻŋ
Explanation: Tiny droplets collide and combine to form larger droplets.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻŦā§ā§° āĻāĻāĻž āĻāĻ¨āĻā§ā§° āĻ˛āĻāĻ¤ āĻ§āĻžāĻā§āĻāĻž āĻāĻžāĻ āĻŽāĻŋāĻ˛āĻŋ āĻĄāĻžāĻā§° āĻšāĻ¯āĻŧāĨ¤
Q7. Raindrops fall when they become _____. | āĻā§āĻĒāĻžāĻŦā§ā§° _____ āĻš’āĻ˛ā§ āĻŦā§°āĻˇā§āĻŖ āĻĒā§°ā§āĨ¤
(a) Light | āĻĒāĻžāĻ¤āĻ˛ (b) Heavy | āĻāĻžā§°ā§ (c) Dry | āĻļā§āĻāĻžāĻ¨ (d) Small | āĻ¸ā§°ā§
Ans: (b) Heavy | āĻāĻžā§°ā§
Explanation: When droplets become too heavy, gravity pulls them down as rain.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻā§āĻĒāĻžāĻŦā§ā§° āĻāĻžā§°ā§ āĻš’āĻ˛ā§ āĻŽāĻžāĻ§ā§āĻ¯āĻžāĻāĻ°ā§āĻˇāĻŖ āĻļāĻā§āĻ¤āĻŋāĻ¯āĻŧā§ āĻ¸āĻŋāĻšāĻāĻ¤āĻ āĻ¤āĻ˛āĻ˛ā§ āĻāĻžāĻ¨ā§ āĻā§°ā§ āĻŦā§°āĻˇā§āĻŖ āĻĒā§°ā§āĨ¤
Q8. What cannot hold heavy droplets? | āĻāĻžā§°ā§ āĻā§āĻĒāĻž āĻāĻžāĻ āĻ§ā§°āĻŋ ā§°āĻžāĻāĻŋāĻŦ āĻ¨ā§ā§ąāĻžā§°ā§?
(a) Wind | āĻŦāĻ¤āĻžāĻš (b) Clouds | āĻŽā§āĻ (c) Sun | āĻ¸ā§ā§°ā§āĻ¯ (d) Earth | āĻĒā§āĻĨāĻŋā§ąā§
Ans: (b) Clouds | āĻŽā§āĻ
Explanation: Clouds can hold only small droplets; heavy ones fall as rain.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŽā§āĻā§ āĻ¸ā§°ā§ āĻā§āĻĒāĻžāĻšā§ āĻ§ā§°āĻŋ ā§°āĻžāĻāĻŋāĻŦ āĻĒāĻžā§°ā§, āĻāĻžā§°ā§ āĻā§āĻĒāĻž āĻŦā§°āĻˇā§āĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻĒā§°ā§āĨ¤
Q9. Rain falls from _____. | āĻŦā§°āĻˇā§āĻŖ _____ āĻĒā§°āĻž āĻĒā§°ā§āĨ¤
(a) Trees | āĻāĻ (b) Clouds | āĻŽā§āĻ (c) Mountains | āĻĒāĻžāĻšāĻžā§° (d) Rivers | āĻ¨āĻĻā§
Ans: (b) Clouds | āĻŽā§āĻ
Explanation: Rain is formed in clouds and then falls to Earth.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŦā§°āĻˇā§āĻŖ āĻŽā§āĻāĻ¤ āĻ¸ā§āĻˇā§āĻāĻŋ āĻšāĻ¯āĻŧ āĻā§°ā§ āĻ¤āĻžā§° āĻĒā§°āĻž āĻŽāĻžāĻāĻŋāĻ˛ā§ āĻĒā§°ā§āĨ¤
Q10. Raindrops form when tiny droplets _____. | āĻ¸ā§°ā§ āĻā§āĻĒāĻžāĻŦā§ā§° _____ āĻš’āĻ˛ā§ āĻŦā§°āĻˇā§āĻŖā§° āĻā§āĻĒāĻž āĻ¸ā§āĻˇā§āĻāĻŋ āĻšāĻ¯āĻŧāĨ¤
(a) Combine | āĻŽāĻŋāĻ˛āĻŋ āĻ¯āĻžāĻ¯āĻŧ (b) Disappear | āĻ¨āĻžāĻāĻāĻŋāĻ¯āĻŧāĻž āĻšāĻ¯āĻŧ (c) Burn | āĻā§āĻŦāĻ˛āĻŋ (d) Break | āĻāĻžāĻāĻŋ
Ans: (a) Combine | āĻŽāĻŋāĻ˛āĻŋ āĻ¯āĻžāĻ¯āĻŧ
Explanation: When many small droplets combine, they grow large enough to fall as rain.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŦāĻšā§ āĻ¸ā§°ā§ āĻā§āĻĒāĻž āĻŽāĻŋāĻ˛āĻŋ āĻ’āĻ˛ā§ āĻĄāĻžāĻā§° āĻšā§ āĻŦā§°āĻˇā§āĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻĒā§°ā§āĨ¤