How does rain come ? / āĻŦā§°āĻˇā§āĻŖ āĻā§āĻ¨ā§āĻā§ āĻšāĻ¯āĻŧ ?
How does rain come ? / āĻŦā§°āĻˇā§āĻŖ āĻā§āĻ¨ā§āĻā§ āĻšāĻ¯āĻŧ ?
Rain is part of the water cycle (āĻāĻ˛āĻāĻā§ā§°).
Rain is a natural process that occurs through the water cycle. First, the Sun heats water from rivers, lakes, ponds, and oceans. Due to this heat, water changes into water vapour and rises up into the atmosphere. This process is called evaporation. As the water vapour goes higher, it cools down and changes into tiny water droplets. These droplets gather together and form clouds. This process is called condensation. When more and more droplets join together, the clouds become heavy and cannot hold the water anymore. Then, the water falls back to the Earth in the form of rain. This continuous process of evaporation, condensation, and rainfall is called the water cycle.
āĻŦā§°āĻˇā§āĻŖ āĻšā§āĻā§ āĻāĻ āĻĒā§ā§°āĻžāĻā§āĻ¤āĻŋāĻ āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻž āĻ¯āĻŋ āĻāĻ˛āĻāĻā§ā§°ā§° āĻā§°āĻŋāĻ¯āĻŧāĻ¤ā§ āĻāĻā§āĨ¤ āĻĒā§ā§°āĻĨāĻŽā§ āĻ¸ā§ā§°ā§āĻ¯āĻ āĻ¨āĻĻā§, āĻšā§ā§°āĻĻ, āĻĒā§āĻā§ā§°ā§ āĻā§°ā§ āĻ¸āĻžāĻā§°ā§° āĻĒāĻžāĻ¨ā§ āĻā§°āĻŽ āĻā§°ā§āĨ¤ āĻāĻ āĻ¤āĻžāĻĒā§° āĻĢāĻ˛āĻ¤ āĻĒāĻžāĻ¨ā§ āĻŦāĻžāĻˇā§āĻĒāĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻšā§ āĻŦāĻžāĻ¯āĻŧā§āĻŽāĻŖā§āĻĄāĻ˛āĻ˛ā§ āĻāĻĒā§°āĻ˛ā§ āĻāĻ ā§āĨ¤ āĻāĻ āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻžāĻ āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ āĻŦā§āĻ˛āĻŋ āĻā§ā§ąāĻž āĻšāĻ¯āĻŧāĨ¤ āĻŦāĻžāĻˇā§āĻĒ āĻāĻĒā§°āĻ˛ā§ āĻā§ āĻ āĻžāĻŖā§āĻĄāĻž āĻš’āĻ˛ā§ āĻ¸ā§°ā§ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛āĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻšāĻ¯āĻŧāĨ¤ āĻāĻ āĻā§āĻĒāĻžāĻ˛āĻŦā§ā§° āĻāĻā§āĻ˛āĻ āĻšā§ āĻŽā§āĻ āĻāĻ āĻ¨ āĻā§°ā§āĨ¤ āĻāĻ āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻžāĻ āĻāĻ¨ā§āĻā§ąāĻ¨ āĻŦā§āĻ˛āĻŋ āĻā§ā§ąāĻž āĻšāĻ¯āĻŧāĨ¤ āĻ¯ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŽā§āĻāĻ¤ āĻ āĻ§āĻŋāĻ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛ āĻāĻŽāĻž āĻšāĻ¯āĻŧ, āĻ¤ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŽā§āĻ āĻāĻ§ā§ā§° āĻšā§ āĻ¯āĻžāĻ¯āĻŧ āĻā§°ā§ āĻĒāĻžāĻ¨ā§ āĻ§ā§°āĻŋ ā§°āĻžāĻāĻŋāĻŦ āĻ¨ā§ā§ąāĻžā§°ā§āĨ¤ āĻ¤ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻ¸ā§āĻ āĻĒāĻžāĻ¨ā§ āĻŦā§°āĻˇā§āĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻĒā§āĻ¨ā§° āĻŽāĻžāĻāĻŋāĻ˛ā§ āĻĒā§°ā§āĨ¤ āĻāĻ āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨, āĻāĻ¨ā§āĻā§ąāĻ¨ āĻā§°ā§ āĻŦā§°āĻˇā§āĻŖā§° āĻ āĻŦāĻŋā§°āĻ¤ āĻāĻā§ā§°āĻā§āĻ āĻāĻ˛āĻāĻā§ā§° āĻŦā§āĻ˛āĻŋ āĻā§ā§ąāĻž āĻšāĻ¯āĻŧāĨ¤
Summary / āĻ¸āĻžā§°āĻžāĻāĻļ
Rain is formed through evaporation, condensation, and rainfall. āĻŦā§°āĻˇā§āĻŖ āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨, āĻāĻ¨ā§āĻā§ąāĻ¨ āĻā§°ā§ āĻŦā§°āĻˇā§āĻŖ āĻĒā§°āĻžā§° āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻžā§° āĻĢāĻ˛āĻ¤ āĻ¸ā§āĻˇā§āĻāĻŋ āĻšāĻ¯āĻŧāĨ¤
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MCQs, or short exam questions
1. Rain is a part of which cycle ? / āĻŦā§°āĻˇā§āĻŖ āĻā§āĻ¨ āĻāĻā§ā§°ā§° āĻ āĻāĻļ ?
A. Nitrogen cycle / āĻ¨āĻžāĻāĻā§ā§°'āĻā§āĻ¨ āĻāĻā§ā§° | B. Water cycle / āĻāĻ˛āĻāĻā§ā§° | C. Carbon cycle / āĻāĻžā§°ā§āĻŦāĻ¨ āĻāĻā§ā§° | D. Oxygen cycle / āĻ
āĻā§āĻ¸āĻŋāĻā§āĻ¨ āĻāĻā§ā§°
Ans: B. Water cycle / āĻāĻ˛āĻāĻā§ā§°
Explanation: Rain is part of the water cycle, where water continuously moves between Earth and atmosphere. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŦā§°āĻˇā§āĻŖ āĻšā§āĻā§ āĻāĻ˛āĻāĻā§ā§°ā§° āĻ āĻāĻļ, āĻ¯’āĻ¤ āĻĒāĻžāĻ¨ā§ āĻĒā§āĻĨāĻŋā§ąā§ āĻā§°ā§ āĻŦāĻžāĻ¯āĻŧā§āĻŽāĻŖā§āĻĄāĻ˛ā§° āĻŽāĻžāĻāĻ¤ āĻ¸āĻĻāĻžāĻ¯āĻŧ āĻāĻ˛āĻžāĻāĻ˛ āĻā§°ā§āĨ¤
2. Which process changes water into water vapour ? / āĻā§āĻ¨ āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻžāĻ āĻĒāĻžāĻ¨ā§āĻ āĻŦāĻžāĻˇā§āĻĒāĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻā§°ā§ ?
A. Condensation / āĻāĻ¨ā§āĻā§ąāĻ¨ | B. Freezing / āĻāĻŽāĻž āĻšā§ā§ąāĻž | C. Evaporation / āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ | D. Melting / āĻāĻ˛āĻ¨
Ans: C. Evaporation / āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨
Explanation: Evaporation is the process in which liquid water changes into vapour due to heat from the Sun. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ āĻšā§āĻā§ āĻ¸ā§āĻ āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻž āĻ¯’āĻ¤ āĻ¸ā§ā§°ā§āĻ¯ā§° āĻ¤āĻžāĻĒā§° āĻĢāĻ˛āĻ¤ āĻĒāĻžāĻ¨ā§ āĻŦāĻžāĻˇā§āĻĒāĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻšāĻ¯āĻŧāĨ¤
3. Clouds are formed due to: / āĻŽā§āĻ āĻā§āĻ¨ā§āĻā§ āĻāĻ āĻ¨ āĻšāĻ¯āĻŧ ?
A. Evaporation / āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ | B. Condensation / āĻāĻ¨ā§āĻā§ąāĻ¨ | C. Melting / āĻāĻ˛āĻ¨ | D. Boiling / āĻāĻ¤āĻ˛ā§ā§ąāĻž
Ans: B. Condensation / āĻāĻ¨ā§āĻā§ąāĻ¨
Explanation: Clouds form when water vapour cools and turns into tiny water droplets. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻŽā§āĻ āĻāĻ āĻ¨ āĻšāĻ¯āĻŧ āĻ¯ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŦāĻžāĻˇā§āĻĒ āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§ āĻ¸ā§°ā§ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛āĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻšāĻ¯āĻŧāĨ¤
4. Rain falls when clouds become: / āĻŽā§āĻ āĻā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŦā§°āĻˇā§āĻŖ āĻĻāĻŋāĻ¯āĻŧā§ ?
A. Light / āĻšāĻžāĻ˛āĻāĻž | B. Cold / āĻ āĻžāĻŖā§āĻĄāĻž | C. Heavy / āĻāĻ§ā§ā§° | D. Small / āĻ¸ā§°ā§
Ans: C. Heavy / āĻāĻ§ā§ā§°
Explanation: When clouds become too heavy with water droplets, they release rain. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻ¯ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŽā§āĻ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛ā§°ā§ āĻāĻ§ā§ā§° āĻšā§ āĻ¯āĻžāĻ¯āĻŧ, āĻ¤ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻ¸āĻŋāĻšāĻāĻ¤ā§ āĻŦā§°āĻˇā§āĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻĒāĻžāĻ¨ā§ āĻŽāĻžāĻāĻŋāĻ˛ā§ āĻā§°āĻŋ āĻĻāĻŋāĻ¯āĻŧā§āĨ¤
5. The main source of energy for the water cycle is: / āĻāĻ˛āĻāĻā§ā§°ā§° āĻŽā§āĻā§āĻ¯ āĻļāĻā§āĻ¤āĻŋā§° āĻā§āĻ¸ āĻāĻŋ ?
A. Moon / āĻāĻ¨ā§āĻĻā§ā§° | B. Stars / āĻ¤āĻžā§°āĻāĻž | C. Sun / āĻ¸ā§ā§°ā§āĻ¯ | D. Wind / āĻŦāĻ¤āĻžāĻš
Ans: C. Sun / āĻ¸ā§ā§°ā§āĻ¯
Explanation: The Sun provides heat energy that drives evaporation and the whole water cycle.
āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻ¸ā§ā§°ā§āĻ¯āĻ āĻ¤āĻžāĻĒ āĻļāĻā§āĻ¤āĻŋ āĻĻāĻŋāĻ¯āĻŧā§ āĻ¯āĻžā§° āĻĢāĻ˛āĻ¤ āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ āĻā§°ā§ āĻ¸āĻŽā§āĻĒā§ā§°ā§āĻŖ āĻāĻ˛āĻāĻā§ā§° āĻāĻ˛āĻŋ āĻĨāĻžāĻā§āĨ¤
6. Water vapour is present in: / āĻĒāĻžāĻ¨ā§ā§° āĻŦāĻžāĻˇā§āĻĒ āĻā§āĻ¨ āĻ ā§ąāĻ¸ā§āĻĨāĻžāĻ¤ āĻĨāĻžāĻā§ ?
A. Solid form / āĻāĻ āĻŋāĻ¨ āĻ
ā§ąāĻ¸ā§āĻĨāĻž | B. Liquid form / āĻ¤ā§°āĻ˛ āĻ
ā§ąāĻ¸ā§āĻĨāĻž | C. Gaseous form / āĻā§āĻā§āĻ¯āĻŧ āĻ
ā§ąāĻ¸ā§āĻĨāĻž | D. Ice form / āĻŦā§°āĻĢ āĻ
ā§ąāĻ¸ā§āĻĨāĻž
Ans: C. Gaseous form / āĻā§āĻā§āĻ¯āĻŧ āĻ
ā§ąāĻ¸ā§āĻĨāĻž
Explanation: Water vapour is the gaseous state of water. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻĒāĻžāĻ¨ā§ā§° āĻŦāĻžāĻˇā§āĻĒ āĻšā§āĻā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻā§āĻ¯āĻŧ āĻ ā§ąāĻ¸ā§āĻĨāĻžāĨ¤
Short Answer Questions / āĻāĻŽā§ āĻāĻ¤ā§āĻ¤ā§°ā§° āĻĒā§ā§°āĻļā§āĻ¨
1. What is evaporation? / āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ āĻāĻŋ ?
Evaporation is the process in which liquid water changes into water vapour due to heat from the Sun. āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨ āĻšā§āĻā§ āĻ¸ā§āĻ āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻž āĻ¯’āĻ¤ āĻ¸ā§ā§°ā§āĻ¯ā§° āĻ¤āĻžāĻĒā§° āĻĢāĻ˛āĻ¤ āĻ¤ā§°āĻ˛ āĻĒāĻžāĻ¨ā§ āĻŦāĻžāĻˇā§āĻĒāĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻšāĻ¯āĻŧāĨ¤
2. What is condensation ? / āĻāĻ¨ā§āĻā§ąāĻ¨ āĻāĻŋ ?
Condensation is the process in which water vapour cools and changes into tiny water droplets forming clouds. āĻāĻ¨ā§āĻā§ąāĻ¨ āĻšā§āĻā§ āĻ¸ā§āĻ āĻĒā§ā§°āĻā§ā§°āĻŋāĻ¯āĻŧāĻž āĻ¯’āĻ¤ āĻŦāĻžāĻˇā§āĻĒ āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§ āĻ¸ā§°ā§ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛āĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻšāĻ¯āĻŧ āĻā§°ā§ āĻŽā§āĻ āĻāĻ āĻ¨ āĻā§°ā§āĨ¤
3. How are clouds formed ? / āĻŽā§āĻ āĻā§āĻ¨ā§āĻā§ āĻāĻ āĻ¨ āĻšāĻ¯āĻŧ ?
Clouds are formed when water vapour in the air cools down and turns into tiny water droplets. āĻŦāĻžāĻ¯āĻŧā§ā§° āĻŦāĻžāĻˇā§āĻĒ āĻ āĻžāĻŖā§āĻĄāĻž āĻšā§ āĻ¸ā§°ā§ āĻ¸ā§°ā§ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛āĻ˛ā§ āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻš’āĻ˛ā§ āĻŽā§āĻ āĻāĻ āĻ¨ āĻšāĻ¯āĻŧāĨ¤
4. Why does rain fall ? / āĻŦā§°āĻˇā§āĻŖ āĻāĻŋāĻ¯āĻŧ āĻšāĻ¯āĻŧ ?
Rain falls when clouds become heavy with water droplets and cannot hold them anymore. āĻ¯ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŽā§āĻ āĻĒāĻžāĻ¨ā§ā§° āĻā§āĻĒāĻžāĻ˛ā§°ā§ āĻāĻ§ā§ā§° āĻšā§ āĻ¯āĻžāĻ¯āĻŧ āĻā§°ā§ āĻ§ā§°āĻŋ ā§°āĻžāĻāĻŋāĻŦ āĻ¨ā§ā§ąāĻžā§°ā§, āĻ¤ā§āĻ¤āĻŋāĻ¯āĻŧāĻž āĻŦā§°āĻˇā§āĻŖ āĻšāĻ¯āĻŧāĨ¤
5. What is the water cycle ? / āĻāĻ˛āĻāĻā§ā§° āĻāĻŋ ?
The water cycle is the continuous movement of water from Earth to the atmosphere and back to Earth through evaporation, condensation, and rainfall. āĻāĻ˛āĻāĻā§ā§° āĻšā§āĻā§ āĻĒāĻžāĻ¨ā§ā§° āĻāĻ āĻ āĻŦāĻŋā§°āĻ¤ āĻāĻ˛āĻžāĻāĻ˛, āĻ¯’āĻ¤ āĻĒāĻžāĻ¨ā§ āĻŦāĻžāĻˇā§āĻĒā§āĻā§ąāĻ¨, āĻāĻ¨ā§āĻā§ąāĻ¨ āĻā§°ā§ āĻŦā§°āĻˇā§āĻŖā§° āĻŽāĻžāĻ§ā§āĻ¯āĻŽā§ā§°ā§ āĻĒā§āĻĨāĻŋā§ąā§ āĻā§°ā§ āĻŦāĻžāĻ¯āĻŧā§āĻŽāĻŖā§āĻĄāĻ˛ā§° āĻŽāĻžāĻāĻ¤ āĻā§ā§°āĻŋ āĻĨāĻžāĻā§āĨ¤