Amazing Human Body Facts (āφāĻļā§āĻšā§°ā§āϝāϜāύāĻ• āĻŽāĻžāĻ¨ā§ą āĻļ⧰⧀⧰⧰ āϤāĻĨā§āϝ) - 2


1) Why is our skull hard ? / āφāĻŽāĻžā§° āĻŽā§‚ā§°ā§° āĻ–ā§‹āϞ (Skull) āĻ•āĻŋāϝāĻŧ āĻ•āĻ āĻŋāύ ?



  • The skull protects the brain, which is very soft and delicate. (āĻŽā§‚ā§°ā§° āĻ–ā§‹āϞ⧇ āĻŽāĻ—āϜ⧁āĻ• āϏ⧁⧰āĻ•ā§āώāĻž āĻĻāĻŋāϝāĻŧ⧇, āϝāĻŋ āĻ…āϤāĻŋ āϕ⧋āĻŽāϞ āφ⧰⧁ āϏāĻ‚āĻŦ⧇āĻĻāύāĻļā§€āϞāĨ¤)

  • It acts like a strong helmet around the brain. (āχ āĻŽāĻ—āϜ⧁⧰ āϚāĻžā§°āĻŋāĻ“āĻĢāĻžāϞ⧇ āĻāϟāĻž āĻļāĻ•ā§āϤāĻŋāĻļāĻžāϞ⧀ āĻšā§‡āϞāĻŽā§‡āϟ⧰ āĻĻ⧰⧇ āĻ•āĻžāĻŽ āϕ⧰⧇āĨ¤)

  • If we fall or get hit, the skull absorbs much of the impact. (āφāĻŽāĻŋ āĻĒā§°āĻŋāϞ⧇ āĻŦāĻž āφāϘāĻžāϤ āĻĒāĻžāϞ⧇ āĻŽā§‚ā§°ā§° āĻ–ā§‹āϞ⧇ āφāϘāĻžāϤ⧰ āĻŦāĻšā§ āĻ…āĻ‚āĻļ āĻļā§‹āώāĻŖ āϕ⧰⧇āĨ¤)

  • It prevents serious damage to the brain. (āχāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻŽāĻ—āϜ⧁⧰ āϗ⧁⧰⧁āϤ⧰ āĻ•ā§āώāϤāĻŋ āĻšā§‹ā§ąāĻžā§° āĻĒā§°āĻž ā§°āĻ•ā§āώāĻž āĻĒāĻžāϝāĻŧāĨ¤)

  • The skull is made of strong bones joined together. (āĻŽā§‚ā§°ā§° āĻ–ā§‹āϞ āĻŦāĻšā§ āĻļāĻ•ā§āϤāĻŋāĻļāĻžāϞ⧀ āĻ…āĻ¸ā§āĻĨāĻŋ (Bone) āϞāĻ— āϞāĻžāĻ—āĻŋ āĻ—āĻ āĻŋāϤāĨ¤)

  • So it keeps our brain safe and protected. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āχ āĻŽāĻ—āϜ⧁āĻ• āϏ⧁⧰āĻ•ā§āώāĻŋāϤ āϕ⧰āĻŋ ā§°āĻžāϖ⧇āĨ¤)


2) Why do we vomit ? / āφāĻŽāĻŋ āĻŦāĻŽāĻŋ āĻ•āĻŋāϝāĻŧ āϕ⧰⧋āρ ?



  • Vomiting happens when the stomach wants to remove something harmful. (āĻĒāĻžāĻ•āĻ¸ā§āĻĨāϞ⧀āϝāĻŧ⧇ āĻ•ā§āώāϤāĻŋāĻ•āĻžā§°āĻ• āĻŦāĻ¸ā§āϤ⧁ āĻŦāĻžāĻšāĻŋā§° āϕ⧰āĻŋāĻŦāϞ⧈ āĻšā§‡āĻˇā§āϟāĻž āϕ⧰āĻŋāϞ⧇ āĻŦāĻŽāĻŋ āĻšāϝāĻŧāĨ¤)

  • It may be caused by spoiled food, infection, or motion sickness. (āĻŦ⧇āϝāĻŧāĻž āĻ–āĻžāĻĻā§āϝ, āϏāĻ‚āĻ•ā§āϰāĻŽāĻŖ āĻŦāĻž āϝāĻžāĻ¤ā§ā§°āĻžāϜāύāĻŋāϤ āĻ…āϏ⧁āĻ¸ā§āĻĨāϤāĻžā§° āĻŦāĻžāĻŦ⧇ āĻŦāĻŽāĻŋ āĻš'āĻŦ āĻĒāĻžā§°ā§‡āĨ¤)

  • The brain sends a signal to empty the stomach. (āĻŽāĻ—āĻœā§ā§ąā§‡ āĻĒāĻžāĻ•āĻ¸ā§āĻĨāϞ⧀ āĻ–āĻžāϞ⧀ āϕ⧰āĻŋāĻŦāϞ⧈ āϏāĻ‚āϕ⧇āϤ āĻĒāĻ āĻžāϝāĻŧāĨ¤)

  • The stomach muscles push the contents upward. (āĻĒāĻžāĻ•āĻ¸ā§āĻĨāϞ⧀⧰ āĻĒ⧇āĻļā§€āĻŦ⧋⧰⧇ āĻ­āĻŋāϤ⧰⧰ āĻŦāĻ¸ā§āϤ⧁ āĻ“āĻĒā§°āϞ⧈ āϠ⧇āϞāĻŋ āĻĻāĻŋāϝāĻŧ⧇āĨ¤)

  • This helps remove harmful substances from the body. (āχāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻ•ā§āώāϤāĻŋāĻ•āĻžā§°āĻ• āĻĒāĻĻāĻžā§°ā§āĻĨ āĻļ⧰⧀⧰⧰ āĻĒā§°āĻž āĻŦāĻžāĻšāĻŋā§° āĻšāϝāĻŧāĨ¤)

  • So vomiting is a protective action. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āĻŦāĻŽāĻŋ āĻļ⧰⧀⧰⧰ āĻāĻ• āϏ⧁⧰āĻ•ā§āώāĻžāĻŽā§‚āϞāĻ• āĻĒā§ā§°āϤāĻŋāĻ•ā§ā§°āĻŋāϝāĻŧāĻžāĨ¤)


3) Why does white pus form in a wound ? / āϘāĻžāρāϤ āĻŦāĻ—āĻž āĻĒ⧁āρāϜ āĻ•āĻŋāϝāĻŧ āϏ⧃āĻˇā§āϟāĻŋ āĻšāϝāĻŧ 



  • When germs enter a wound, white blood cells fight them. (āϘāĻžāρāϤ āĻœā§€ā§ąāĻžāϪ⧁ āϏ⧋āĻŽāĻžāϞ⧇ āĻļā§āĻŦ⧇āϤ ā§°āĻ•ā§āϤāĻ•āĻŖāĻŋāĻ•āĻžāχ (White Blood Cells) āϏāĻŋāĻšāρāϤ⧰ āϏ⧈āϤ⧇ āϝ⧁āρāĻœā§‡āĨ¤)

  • During this fight, some cells and germs die. (āĻāχ āϝ⧁āρāϜ⧰ āϏāĻŽāϝāĻŧāϤ āĻ•āĻŋāϛ⧁āĻŽāĻžāύ āϕ⧋āώ āφ⧰⧁ āĻœā§€ā§ąāĻžāϪ⧁ āĻŽā§°āĻŋ āϝāĻžāϝāĻŧāĨ¤)

  • The dead cells and bacteria form a thick white fluid. (āĻŽā§ƒāϤ āϕ⧋āώ āφ⧰⧁ āĻŦ⧇āĻ•ā§āĻŸā§‡ā§°āĻŋāϝāĻŧāĻžāχ āĻŽāĻŋāϞāĻŋ āϘāύ āĻŦāĻ—āĻž āϤ⧰āϞ āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰⧇āĨ¤)

  • This fluid is called pus. (āĻāχ āϤ⧰āϞāĻ• āĻĒ⧁āρāϜ (Pus) āĻŦā§‹āϞāĻž āĻšāϝāĻŧāĨ¤)

  • Pus shows that the body is fighting infection. (āĻĒ⧁āρāĻœā§‡ āĻĻ⧇āĻ–ā§ā§ąāĻžāϝāĻŧ āϝ⧇ āĻļ⧰⧀⧰⧇ āϏāĻ‚āĻ•ā§āϰāĻŽāĻŖā§° āĻŦāĻŋ⧰⧁āĻĻā§āϧ⧇ āϝ⧁āρāϜ āĻĻāĻŋāϛ⧇āĨ¤)

  • Cleaning the wound helps it heal properly. (āϘāĻžāρ āĻĒā§°āĻŋāĻˇā§āĻ•āĻžā§° ā§°āĻžāĻ–āĻŋāϞ⧇ āϏ⧋āύāĻ•āĻžāϞ⧇ āĻ­āĻžāϞ āĻšāϝāĻŧāĨ¤)


4) Why should we brush our teeth every day ? / āφāĻŽāĻŋ āĻĒā§ā§°āϤāĻŋāĻĻāĻŋāύ⧇ āĻĻāĻžāρāϤ āĻ•āĻŋāϝāĻŧ āĻŽāĻžāϜāĻŋāĻŦ āϞāĻžāϗ⧇ ?



  • Food particles stick to our teeth after eating. (āĻ–ā§‹ā§ąāĻžā§° āĻĒāĻŋāĻ›āϤ āĻ–āĻžāĻĻā§āϝ⧰ āϏ⧰⧁ āĻ•āĻŖāĻžāĻŦā§‹ā§° āĻĻāĻžāρāϤāϤ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇āĨ¤)

  • If not cleaned, bacteria grow on them. (āĻĒā§°āĻŋāĻˇā§āĻ•āĻžā§° āύāϕ⧰āĻŋāϞ⧇ āϤāĻžāϤ āĻŦ⧇āĻ•ā§āĻŸā§‡ā§°āĻŋāϝāĻŧāĻž āĻŦ⧃āĻĻā§āϧāĻŋ āĻĒāĻžāϝāĻŧāĨ¤)

  • These bacteria can cause cavities and bad smell. (āĻāχ āĻŦ⧇āĻ•ā§āĻŸā§‡ā§°āĻŋāϝāĻŧāĻžāχ āĻĻāĻžāρāϤ⧰ āĻ—āĻžāρāϤ (Cavity) āφ⧰⧁ āĻŽā§āĻ–ā§° āĻĻā§ā§°ā§āĻ—āĻ¨ā§āϧ āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰āĻŋāĻŦ āĻĒāĻžā§°ā§‡āĨ¤)

  • Brushing removes food and germs. (āĻĻāĻžāρāϤ āĻŽāĻžāϜāĻŋāϞ⧇ āĻ–āĻžāĻĻā§āϝāĻ•āĻŖāĻž āφ⧰⧁ āĻœā§€ā§ąāĻžāϪ⧁ āφāρāϤ⧰āĻŋ āϝāĻžāϝāĻŧāĨ¤)

  • It keeps teeth strong and healthy. (āχāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻĻāĻžāρāϤ āĻŽāϜāĻŦ⧁āϤ āφ⧰⧁ āϏ⧁āĻ¸ā§āĻĨ āĻĨāĻžāϕ⧇āĨ¤)

  • So brushing twice daily is important. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āĻĻāĻŋāύ⧇ āĻĻ⧁āĻŦāĻžā§° āĻĻāĻžāρāϤ āĻŽāĻžāϜāĻž āĻ…āĻ¤ā§āϝāĻ¨ā§āϤ āĻĒā§ā§°āϝāĻŧā§‹āϜāύ⧀āϝāĻŧāĨ¤)


5) Why do we need to take a bath ? / āφāĻŽāĻŋ āĻ—āĻž āϧ⧁āĻŦ āϞāĻžāϗ⧇ āĻ•āĻŋāϝāĻŧ ?



  • During the day, dirt and sweat collect on our skin. (āĻĻāĻŋāύāĻŸā§‹ā§° āĻ­āĻŋāϤ⧰āϤ āφāĻŽāĻžā§° āĻ›āĻžāϞāϤ āĻŽāϞāĻŋ āφ⧰⧁ āϘāĻžāĻŽ āϜāĻŽāĻž āĻšāϝāĻŧāĨ¤)

  • Germs also stick to our body. (āĻœā§€ā§ąāĻžāϪ⧁āĻ“ āφāĻŽāĻžā§° āĻļ⧰⧀⧰āϤ āϞāĻžāĻ—āĻŋ āĻĨāĻžāϕ⧇āĨ¤)

  • Bathing removes dirt and bacteria. (āĻ—āĻž āϧ⧁āϞ⧇ āĻŽāϞāĻŋ āφ⧰⧁ āĻŦ⧇āĻ•ā§āĻŸā§‡ā§°āĻŋāϝāĻŧāĻž āφāρāϤ⧰āĻŋ āϝāĻžāϝāĻŧāĨ¤)

  • It keeps the skin fresh and clean. (āχ āĻ›āĻžāϞāĻ• āĻĒā§°āĻŋāĻˇā§āĻ•āĻžā§° āφ⧰⧁ āϏāϤ⧇āϜ ā§°āĻžāϖ⧇āĨ¤)

  • Bathing also prevents infections. (āĻ—āĻž āĻ§ā§‹ā§ąāĻžāχ āϏāĻ‚āĻ•ā§āϰāĻŽāĻŖ ā§°ā§‹āϧ āϕ⧰āĻžāϤ⧋ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇āĨ¤)

  • So it is important for good hygiene. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āĻ­āĻžāϞ āĻ¸ā§āĻŦāĻžāĻ¸ā§āĻĨā§āϝāĻŦāĻŋāϧāĻŋā§° āĻŦāĻžāĻŦ⧇ āĻ—āĻž āĻ§ā§‹ā§ąāĻž āĻ…āϤāĻŋ āϗ⧁⧰⧁āĻ¤ā§āĻŦāĻĒā§‚ā§°ā§āĻŖāĨ¤)


6) Why does our height increase ? (āφāĻŽāĻžā§° āωāĻšā§āϚāϤāĻž āĻ•āĻŋāϝāĻŧ āĻŦāĻžāĻĸāĻŧ⧇ ?)



  • Children grow because their bones grow longer. (āĻļāĻŋāĻļ⧁⧰ āωāĻšā§āϚāϤāĻž āĻŦāĻžāĻĸāĻŧ⧇ āĻ•āĻžā§°āĻŖ āϤ⧇āĻ“āρāϞ⧋āϕ⧰ āĻ…āĻ¸ā§āĻĨāĻŋ āĻĻā§€āϘāϞ āĻšāϝāĻŧāĨ¤)

  • Growth plates at the ends of bones help in this process. (āĻ…āĻ¸ā§āĻĨāĻŋā§° āĻļ⧇āώ āĻ…āĻ‚āĻļāϤ āĻĨāĻ•āĻž āĻ—ā§ā§°ā§‹āĻĨ āĻĒā§āϞ⧇āĻŸā§‡ āĻāχ āĻ•āĻžāĻŽāϤ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇āĨ¤)

  • Growth hormones support bone development. (āĻŦ⧃āĻĻā§āϧāĻŋā§° āĻšā§°āĻŽā§‹āύ⧇ āĻ…āĻ¸ā§āĻĨāĻŋā§° āĻŦāĻŋāĻ•āĻžāĻļāϤ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇āĨ¤)

  • Healthy food and sleep also help growth. (āĻĒ⧁āĻˇā§āϟāĻŋāϕ⧰ āĻ–āĻžāĻĻā§āϝ āφ⧰⧁ āĻ­āĻžāϞ āĻŸā§‹āĻĒāύāĻŋāĻ“ āĻŦ⧃āĻĻā§āϧāĻŋāϤ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇āĨ¤)

  • As bones lengthen, height increases. (āĻ…āĻ¸ā§āĻĨāĻŋ āĻĻā§€āϘāϞ āĻšā§‹ā§ąāĻžā§° āϞāϗ⧇ āϞāϗ⧇ āωāĻšā§āϚāϤāĻž āĻŦ⧃āĻĻā§āϧāĻŋ āĻĒāĻžāϝāĻŧāĨ¤)

  • Growth slows down after teenage years. (āĻ•ā§ˆāĻļā§‹ā§°ā§° āĻĒāĻŋāĻ›āϤ āĻŦ⧃āĻĻā§āϧāĻŋ āϧ⧀⧰ āĻšāϝāĻŧāĨ¤)


7) How do we smell things ? (āφāĻŽāĻŋ āĻ—ā§‹āĻ¨ā§āϧ āϕ⧇āύ⧇āĻ•ā§ˆ āĻĒāĻžāĻ“āρ ?)



  • Tiny smell particles float in the air. āĻ—ā§‹āĻ¨ā§āϧ⧰ āϏ⧰⧁ āϏ⧰⧁ āĻ•āĻŖāĻžāĻŦā§‹ā§° āĻŦāĻžāϝāĻŧ⧁āϤ āĻ­āĻžāρāĻšāĻŋ āĻĨāĻžāϕ⧇āĨ¤)

  • When we breathe in, they enter our nose. (āφāĻŽāĻŋ āĻļā§āĻŦāĻžāϏ āϞ'āϞ⧇ āϏ⧇āχ āĻ•āĻŖāĻžāĻŦā§‹ā§° āύāĻžāĻ•āϤ āϏ⧋āĻŽāĻžāϝāĻŧāĨ¤)

  • Special cells inside the nose detect them. (āύāĻžāϕ⧰ āĻ­āĻŋāϤ⧰⧰ āĻŦāĻŋāĻļ⧇āώ āϕ⧋āώ⧇ āϏ⧇āχāĻŦā§‹ā§° āϚāĻŋāύāĻžāĻ•ā§āϤ āϕ⧰⧇āĨ¤)

  • These cells send signals to the brain. (āĻāχ āϕ⧋āώāĻŦ⧋⧰⧇ āĻŽāĻ—āϜ⧁āϞ⧈ āϏāĻ‚āϕ⧇āϤ āĻĒāĻ āĻžāϝāĻŧāĨ¤)

  • The brain identifies the smell. (āĻŽāĻ—āĻœā§ā§ąā§‡ āĻ—ā§‹āĻ¨ā§āϧāĻŸā§‹ āϚāĻŋāύāĻžāĻ•ā§āϤ āϕ⧰⧇āĨ¤)

  • That is how we recognize different scents. (āĻāχāĻĻ⧰⧇āχ āφāĻŽāĻŋ āĻŦāĻŋāĻ­āĻŋāĻ¨ā§āύ āĻ—ā§‹āĻ¨ā§āϧ āϚāĻŋāύāĻŋāĻŦ āĻĒāĻžā§°ā§‹āρāĨ¤)


8) Can we speak without ears ? (āĻ•āĻžāĻŖ āύ⧋āĻšā§‹ā§ąāĻžāĻ•ā§ˆ āφāĻŽāĻŋ āĻ•āĻĨāĻž āĻ•'āĻŦ āĻĒāĻžā§°āĻŋāĻŽāύ⧇ ?)



  • Speaking uses the voice box and mouth. (āĻ•āĻĨāĻž āĻ•'āĻŦāϞ⧈ āĻ¸ā§āĻŦā§°āϝāĻ¨ā§āĻ¤ā§ā§° āφ⧰⧁ āĻŽā§āĻ– āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧāĨ¤)

  • But hearing helps us learn how to speak clearly. (āĻ•āĻŋāĻ¨ā§āϤ⧁ āĻļ⧁āύāĻŋāĻŦ āĻĒā§°āĻžāĻŸā§‹ā§ąā§‡ āφāĻŽāĻžāĻ• āĻ¸ā§āĻĒāĻˇā§āϟāĻ•ā§ˆ āĻ•āĻĨāĻž āĻ•'āĻŦ āĻļāĻŋāĻ•āĻžāϝāĻŧāĨ¤)

  • People who cannot hear may find it harder to speak normally. (āϝāĻŋāϏāĻ•āϞ⧇ āĻļ⧁āύāĻŋāĻŦ āĻ¨ā§‹ā§ąāĻžā§°ā§‡, āϤ⧇āĻ“āρāϞ⧋āϕ⧰ āĻŦāĻžāĻŦ⧇ āĻ¸ā§āĻŦāĻžāĻ­āĻžā§ąāĻŋāĻ•āĻ­āĻžā§ąā§‡ āĻ•āĻĨāĻž āĻ•ā§‹ā§ąāĻž āĻ•āĻ āĻŋāύ āĻš'āĻŦ āĻĒāĻžā§°ā§‡āĨ¤)

  • They may need special training. (āϤ⧇āĻ“āρāϞ⧋āĻ•āĻ• āĻŦāĻŋāĻļ⧇āώ āĻĒā§ā§°āĻļāĻŋāĻ•ā§āώāĻŖā§° āĻĒā§ā§°āϝāĻŧā§‹āϜāύ āĻš'āĻŦ āĻĒāĻžā§°ā§‡āĨ¤)

  • Hearing helps control pronunciation and tone. (āĻļ⧁āύāĻŋāĻŦ āĻĒā§°āĻžāĻŸā§‹ā§ąā§‡ āωāĻšā§āϚāĻžā§°āĻŖ āφ⧰⧁ āĻ¸ā§āĻŦā§° āύāĻŋāϝāĻŧāĻ¨ā§āĻ¤ā§ā§°āĻŖ āϕ⧰āĻžāϤ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇āĨ¤)

  • So ears are important for proper speech learning. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āϏāĻ āĻŋāĻ•āĻ­āĻžā§ąā§‡ āĻ•āĻĨāĻž āĻ•'āĻŦ āĻļāĻŋāĻ•āĻŋāĻŦāϞ⧈ āĻ•āĻžāĻŖ āϗ⧁⧰⧁āĻ¤ā§āĻŦāĻĒā§‚ā§°ā§āĻŖāĨ¤)


9) Where does our voice come from ? (āφāĻŽāĻžā§° āĻŽāĻžāϤ āĻ•'ā§° āĻĒā§°āĻž āφāĻšā§‡ ? )



  • Our voice is produced in the voice box (larynx). (āφāĻŽāĻžā§° āĻŽāĻžāϤ āĻ¸ā§āĻŦā§°āϝāĻ¨ā§āĻ¤ā§ā§° (Larynx) āϤ āϏ⧃āĻˇā§āϟāĻŋ āĻšāϝāĻŧāĨ¤)

  • Inside it are vocal cords. (āχāϝāĻŧāĻžā§° āĻ­āĻŋāϤ⧰āϤ āĻ¸ā§āĻŦā§°āϤāĻ¨ā§āĻ¤ā§ā§°ā§€ (Vocal Cords) āĻĨāĻžāϕ⧇āĨ¤)

  • When air passes through them, they vibrate. (āĻŦāĻžāϝāĻŧ⧁ āχāϝāĻŧāĻžā§° āĻŽāĻžāĻœā§‡ā§°ā§‡ āĻĒāĻžā§° āĻš'āϞ⧇ āχ āĻ•āĻŽā§āĻĒāĻŋāϤ āĻšāϝāĻŧāĨ¤)

  • These vibrations create sound. (āĻāχ āĻ•āĻŽā§āĻĒāύ⧰ āĻĢāϞāϤ āĻļāĻŦā§āĻĻ āϏ⧃āĻˇā§āϟāĻŋ āĻšāϝāĻŧāĨ¤)

  • The mouth and tongue shape the sound into words. (āĻŽā§āĻ– āφ⧰⧁ āϜāĻŋāĻ­āĻžāχ āĻļāĻŦā§āĻĻāĻ• āĻļāĻŦā§āĻĻ āĻŦāĻž āĻŦāĻžāĻ•ā§āϝāϤ ā§°ā§‚āĻĒ āĻĻāĻŋāϝāĻŧ⧇āĨ¤)

  • So voice comes from vibrating vocal cords. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āĻ•āĻŽā§āĻĒāĻŋāϤ āĻ¸ā§āĻŦā§°āϤāĻ¨ā§āĻ¤ā§ā§°ā§€ā§° āĻĒā§°āĻž āĻŽāĻžāϤ āϏ⧃āĻˇā§āϟāĻŋ āĻšāϝāĻŧāĨ¤)


10) Why is the thumb so important ? (āĻŦ⧁āĻĸāĻŧāĻž āφāϙ⧁āϞāĻŋ āĻ•āĻŋāϝāĻŧ āχāĻŽāĻžāύ āϗ⧁⧰⧁āĻ¤ā§āĻŦāĻĒā§‚ā§°ā§āĻŖ ?)



  • The thumb can move in different directions. (āĻŦ⧁āĻĸāĻŧāĻž āφāϙ⧁āϞāĻŋāϝāĻŧ⧇ āĻŦāĻŋāĻ­āĻŋāĻ¨ā§āύ āĻĻāĻŋāĻļāϤ āϞ⧰āϚ⧰ āϕ⧰āĻŋāĻŦ āĻĒāĻžā§°ā§‡āĨ¤)

  • It can touch all other fingers. (āχ āφāύ āϏāĻ•āϞ⧋ āφāϙ⧁āϞāĻŋāĻ• āĻ¸ā§āĻĒā§°ā§āĻļ āϕ⧰āĻŋāĻŦ āĻĒāĻžā§°ā§‡āĨ¤)

  • This allows us to grip objects firmly. (āχāϝāĻŧāĻžā§° āĻĢāϞāϤ āφāĻŽāĻŋ āĻŦāĻ¸ā§āϤ⧁ āĻĻ⧃āĻĸāĻŧāĻ­āĻžā§ąā§‡ āϧ⧰āĻŋāĻŦ āĻĒāĻžā§°ā§‹āρāĨ¤)

  • We can hold a pencil or button a shirt. (āφāĻŽāĻŋ āĻĒ⧇āĻžā§āϚāĻŋāϞ āϧ⧰āĻŋāĻŦ āĻŦāĻž āϚāĻžā§°ā§āϟ⧰ āĻŦ⧁āϟāĻžāĻŽ āϞāĻ—āĻžāĻŦ āĻĒāĻžā§°ā§‹āρāĨ¤)

  • Without the thumb, gripping would be difficult. (āĻŦ⧁āĻĸāĻŧāĻž āφāϙ⧁āϞāĻŋ āύāĻžāĻĨāĻžāĻ•āĻŋāϞ⧇ āĻŦāĻ¸ā§āϤ⧁ āϧ⧰āĻž āĻ•āĻ āĻŋāύ āĻš'āϞāĻšā§‡āρāϤ⧇āύāĨ¤)

  • It plays a key role in daily tasks. (āĻĻ⧈āύāĻ¨ā§āĻĻāĻŋāύ āĻ•āĻžāĻŽāϤ āχāϝāĻŧāĻžā§° āĻŦāĻŋāĻļ⧇āώ āĻ­ā§‚āĻŽāĻŋāĻ•āĻž āφāϛ⧇āĨ¤)


11) Why does our skin become darker in the sun ? (ā§°'āĻĻāϤ āφāĻŽāĻžā§° āĻ›āĻžāϞ āĻ•āĻŋāϝāĻŧ āĻ—āĻžāĻĸāĻŧ āĻšāϝāĻŧ ?)



  • Sunlight contains ultraviolet (UV) rays. (āĻ¸ā§‚ā§°ā§āϝ⧰ āĻĒā§‹āĻšā§°āϤ āĻ…āϤāĻŋāĻŦ⧇āϙ⧁āύ⧀āϝāĻŧāĻž (UV) ā§°āĻļā§āĻŽāĻŋ āĻĨāĻžāϕ⧇āĨ¤)

  • The skin produces more melanin to protect itself. (āύāĻŋāϜāϕ⧇ āϏ⧁⧰āĻ•ā§āώāĻž āĻĻāĻŋāĻŦāϞ⧈ āĻ›āĻžāϞ⧇ āĻ…āϧāĻŋāĻ• āĻŽā§‡āϞāĻžāύāĻŋāύ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āϕ⧰⧇āĨ¤)

  • Melanin acts like a natural shield. (āĻŽā§‡āϞāĻžāύāĻŋāύ⧇ āĻĒā§ā§°āĻžāĻ•ā§ƒāϤāĻŋāĻ• āĻĸāĻžāϞ⧰ āĻĻ⧰⧇ āĻ•āĻžāĻŽ āϕ⧰⧇āĨ¤)

  • More melanin makes skin look darker. (āĻ…āϧāĻŋāĻ• āĻŽā§‡āϞāĻžāύāĻŋāύ⧇ āĻ›āĻžāϞ āĻ—āĻžāĻĸāĻŧ āĻĻ⧇āĻ–āĻž āϝāĻžāϝāĻŧāĨ¤)

  • It helps reduce sun damage. (āχ āĻ¸ā§‚ā§°ā§āϝ⧰ āĻ•ā§āώāϤāĻŋ āĻ•āĻŽāĻžāϝāĻŧāĨ¤)

  • So the skin becomes darker for protection. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āϏ⧁⧰āĻ•ā§āώāĻžā§° āĻŦāĻžāĻŦ⧇ āĻ›āĻžāϞ āĻ—āĻžāĻĸāĻŧ āĻšāϝāĻŧāĨ¤)


12) Why do lips crack in winter ? (āĻļā§€āϤāĻ•āĻžāϞāϤ āĻ“āρāĻ  āĻ•āĻŋāϝāĻŧ āĻĢāĻžāĻŸā§‡ ?)



  • Cold air is dry and removes moisture. (āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧ⧁ āĻļ⧁āĻ•āĻžāύ āĻšāϝāĻŧ āφ⧰⧁ āĻ†ā§°ā§āĻĻā§ā§°āϤāĻž āφāρāϤ⧰āĻžāχ āĻĻāĻŋāϝāĻŧ⧇āĨ¤)

  • Lips do not have oil glands. (āĻ“āρāĻ āϤ āϤ⧇āϞ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āϕ⧰āĻž āĻ—ā§ā§°āĻ¨ā§āĻĨāĻŋ āύāĻžāĻĨāĻžāϕ⧇āĨ¤)

  • So they dry out quickly. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āĻ“āρāĻ  āϏ⧋āύāĻ•āĻžāϞ⧇ āĻļ⧁āĻ•āĻžāχ āϝāĻžāϝāĻŧāĨ¤)

  • Dry lips become rough and cracked. (āĻļ⧁āĻ•āĻžāύ āĻ“āρāĻ  āĻ–āĻšāϟāĻž āφ⧰⧁ āĻĢāĻžāϟāĻž āĻšāϝāĻŧāĨ¤)

  • Lip balm helps keep lips moist. (āϞāĻŋāĻĒ āĻŦāĻžāĻŽ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āϕ⧰āĻŋāϞ⧇ āĻ“āρāĻ  āϏāĻŋāĻ•ā§āϤ āĻĨāĻžāϕ⧇āĨ¤)

  • So winter often causes cracked lips. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āĻļā§€āϤāĻ•āĻžāϞāϤ āĻ“āρāĻ  āĻĒā§ā§°āĻžāϝāĻŧ⧇ āĻĢāĻžāĻŸā§‡āĨ¤)


13) Why do we prefer cotton clothes in summer ? (āĻ—ā§°āĻŽāĻ•āĻžāϞāϤ āφāĻŽāĻŋ āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒā§‹ā§° āĻ•āĻŋāϝāĻŧ āĻĒāĻ›āĻ¨ā§āĻĻ āϕ⧰⧋āρ ?)



  • Cotton absorbs sweat easily. (āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒ⧋⧰⧇ āϏāĻšāĻœā§‡ āϘāĻžāĻŽ āĻļā§‹āώāĻŖ āϕ⧰⧇āĨ¤)

  • It allows air to pass through. (āχ āĻŦāĻžāϝāĻŧ⧁ āϚāϞāĻžāϚāϞ āĻš'āĻŦāϞ⧈ āĻĻāĻŋāϝāĻŧ⧇āĨ¤)

  • Sweat evaporates faster in cotton. (āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒā§‹ā§°āϤ āϘāĻžāĻŽ āϏ⧋āύāĻ•āĻžāϞ⧇ āĻŦāĻžāĻˇā§āĻĒā§€āĻ­ā§‚āϤ āĻšāϝāĻŧāĨ¤)

  • This cools the body. (āχāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻļ⧰⧀⧰ āĻ āĻžāĻŖā§āĻĄāĻž āĻĨāĻžāϕ⧇āĨ¤)

  • Cotton is light and comfortable. (āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒā§‹ā§° āĻĒāĻžāϤāϞ āφ⧰⧁ āφ⧰āĻžāĻŽāĻĻāĻžāϝāĻŧāĻ•āĨ¤)

  • So it is good for hot weather. (āϏ⧇āϝāĻŧ⧇āĻšā§‡ āĻ—ā§°āĻŽ āĻŦāϤ⧰āϤ āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒā§‹ā§° āωāĻ¤ā§āϤāĻŽāĨ¤)


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MCQ


Q1. Why do we need to take a bath ? / āφāĻŽāĻŋ āĻ—āĻž āϧ⧁āĻŦ āϞāĻžāϗ⧇ āĻ•āĻŋāϝāĻŧ ?


Options: (a) To remove dirt and germs (b) To become taller (c) To grow hair (d) To sleep


Ans: (a) To remove dirt and germs


Explanation: Bathing removes dirt, sweat, and germs from our body and helps prevent infections. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ—āĻž āϧ⧁āϞ⧇ āĻļ⧰⧀⧰⧰ āĻŽāϞāĻŋ, āϘāĻžāĻŽ āφ⧰⧁ āĻœā§€ā§ąāĻžāϪ⧁ āφāρāϤ⧰āĻŋ āϝāĻžāϝāĻŧ āφ⧰⧁ āϏāĻ‚āĻ•ā§āϰāĻŽāĻŖā§° āĻĒā§°āĻž āϏ⧁⧰āĻ•ā§āώāĻž āĻĒā§‹ā§ąāĻž āϝāĻžāϝāĻŧāĨ¤


Q2. What collects on our skin during the day ? / āĻĻāĻŋāύāĻŸā§‹ā§° āĻ­āĻŋāϤ⧰āϤ āφāĻŽāĻžā§° āĻ›āĻžāϞāϤ āĻ•āĻŋ āϜāĻŽāĻž āĻšāϝāĻŧ ?


Options: (a) Dirt and sweat (b) Water (c) Oil only (d) Blood


Ans: (a) Dirt and sweat


Explanation: During daily activities, dirt and sweat collect on the skin. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻĻ⧈āύāĻ¨ā§āĻĻāĻŋāύ āĻ•āĻžāĻŽā§° āϏāĻŽāϝāĻŧāϤ āĻ›āĻžāϞāϤ āĻŽāϞāĻŋ āφ⧰⧁ āϘāĻžāĻŽ āϜāĻŽāĻž āĻšāϝāĻŧāĨ¤


Q3. Height increases because ______. / āωāĻšā§āϚāϤāĻž āĻŦāĻžāĻĸāĻŧ⧇ āĻ•āĻžā§°āĻŖ ______āĨ¤


Options: (a) Hair grows (b) Bones grow longer (c) Nails grow (d) Skin stretches


Ans: (b) Bones grow longer


Explanation: Children's bones grow longer, causing their height to increase. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻļāĻŋāĻļ⧁⧰ āĻ…āĻ¸ā§āĻĨāĻŋāĻŦā§‹ā§° āĻĻā§€āϘāϞ āĻšā§‹ā§ąāĻžā§° āĻĢāϞāϤ āωāĻšā§āϚāϤāĻž āĻŦ⧃āĻĻā§āϧāĻŋ āĻĒāĻžāϝāĻŧāĨ¤


Q4. What helps bones grow ? / āĻ…āĻ¸ā§āĻĨāĻŋ āĻŦ⧃āĻĻā§āϧāĻŋāϤ āĻ•āĻŋ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇ ?


Options: (a) Growth hormones (b) Dust (c) Tears (d) Sweat


Ans: (a) Growth hormones


Explanation: Growth hormones help bones develop and grow properly. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻŦ⧃āĻĻā§āϧāĻŋā§° āĻšā§°āĻŽā§‹āύ⧇ āĻ…āĻ¸ā§āĻĨāĻŋā§° āϏāĻ āĻŋāĻ• āĻŦāĻŋāĻ•āĻžāĻļ āφ⧰⧁ āĻŦ⧃āĻĻā§āϧāĻŋāϤ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇āĨ¤


Q5. Which of these also helps growth ? / āχāϝāĻŧāĻžā§° āĻ­āĻŋāϤ⧰āϤ āϕ⧋āύāĻŸā§‹ā§ąā§‡ āĻŦ⧃āĻĻā§āϧāĻŋāϤ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇ ?


Options: (a) Healthy food and sleep (b) Watching TV (c) Playing only (d) Noise


Ans: (a) Healthy food and sleep


Explanation: Nutritious food and proper sleep are important for healthy growth. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻĒ⧁āĻˇā§āϟāĻŋāϕ⧰ āĻ–āĻžāĻĻā§āϝ āφ⧰⧁ āĻĒā§°ā§āϝāĻžāĻĒā§āϤ āĻŸā§‹āĻĒāύāĻŋ āϏ⧁āĻ¸ā§āĻĨ āĻŦ⧃āĻĻā§āϧāĻŋā§° āĻŦāĻžāĻŦ⧇ āĻĒā§ā§°āϝāĻŧā§‹āϜāύ⧀āϝāĻŧāĨ¤


Q6. How do smell particles enter our body ? / āĻ—ā§‹āĻ¨ā§āϧ⧰ āĻ•āĻŖāĻžāĻŦā§‹ā§° āϕ⧇āύ⧇āĻ•ā§ˆ āĻļ⧰⧀⧰āϤ āϏ⧋āĻŽāĻžāϝāĻŧ ?


Options: (a) Through ears (b) Through eyes (c) Through nose (d) Through skin


Ans: (c) Through nose


Explanation: Smell particles enter the nose when we breathe. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āφāĻŽāĻŋ āĻļā§āĻŦāĻžāϏ āϞ'āϞ⧇ āĻ—ā§‹āĻ¨ā§āϧ⧰ āĻ•āĻŖāĻžāĻŦā§‹ā§° āύāĻžāĻ•āϤ āϏ⧋āĻŽāĻžāϝāĻŧāĨ¤


Q7. Which cells detect smells ? / āĻ—ā§‹āĻ¨ā§āϧ āϕ⧋āύ⧇ āϚāĻŋāύāĻžāĻ•ā§āϤ āϕ⧰⧇ ?


Options: (a) Skin cells (b) Nose cells (c) Bone cells (d) Blood cells


Ans: (b) Nose cells


Explanation: Special smell receptor cells inside the nose detect different smells. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āύāĻžāϕ⧰ āĻ­āĻŋāϤ⧰⧰ āĻŦāĻŋāĻļ⧇āώ āĻ—ā§ā§°āĻžāĻšāĻ• āϕ⧋āώ⧇ āĻŦāĻŋāĻ­āĻŋāĻ¨ā§āύ āĻ—ā§‹āĻ¨ā§āϧ āϚāĻŋāύāĻžāĻ•ā§āϤ āϕ⧰⧇āĨ¤


Q8. Which organ identifies smells ? / āĻ—ā§‹āĻ¨ā§āϧ āϕ⧋āύ āĻ…āĻ‚āĻ—āχ āϚāĻŋāύāĻžāĻ•ā§āϤ āϕ⧰⧇ ?


Options: (a) Heart (b) Stomach (c) Brain (d) Liver


Ans: (c) Brain


Explanation: The brain receives signals from the nose and identifies the smell. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻŽāĻ—āĻœā§ā§ąā§‡ āύāĻžāϕ⧰ āĻĒā§°āĻž āĻ…āĻšāĻž āϏāĻ‚āϕ⧇āϤ āĻ—ā§ā§°āĻšāĻŖ āϕ⧰āĻŋ āĻ—ā§‹āĻ¨ā§āϧ āϚāĻŋāύāĻžāĻ•ā§āϤ āϕ⧰⧇āĨ¤


Q9. Which body part helps us learn clear speech ? / āĻ¸ā§āĻĒāĻˇā§āϟāĻ•ā§ˆ āĻ•āĻĨāĻž āĻ•'āĻŦ āĻļāĻŋāĻ•āĻžāϤ āϕ⧋āύ āĻ…āĻ‚āĻ—āχ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇ ?


Options: (a) Ears (b) Eyes (c) Teeth (d) Hands


Ans: (a) Ears


Explanation: Hearing helps us learn correct pronunciation and speaking style. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻļ⧁āύāĻžā§° āϜ⧰āĻŋāϝāĻŧāϤ⧇ āφāĻŽāĻŋ āĻļ⧁āĻĻā§āϧ āωāĻšā§āϚāĻžā§°āĻŖ āφ⧰⧁ āĻ•āĻĨāĻž āĻ•ā§‹ā§ąāĻžā§° āϧ⧰āĻŖ āĻļāĻŋāϕ⧋āρāĨ¤


Q10. Voice is produced in the ______. / āĻŽāĻžāϤ ______ āϤ āϏ⧃āĻˇā§āϟāĻŋ āĻšāϝāĻŧāĨ¤


Options: (a) Heart (b) Voice box (c) Kidney (d) Stomach


Ans: (b) Voice box


Explanation: The voice box (larynx) contains vocal cords that produce sound. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ¸ā§āĻŦā§°āϝāĻ¨ā§āĻ¤ā§ā§°āϤ āĻĨāĻ•āĻž āĻ¸ā§āĻŦā§°āϤāĻ¨ā§āĻ¤ā§ā§°ā§€āϝāĻŧ⧇ āĻļāĻŦā§āĻĻ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āϕ⧰⧇āĨ¤


Q11. What vibrates to produce sound ? / āĻļāĻŦā§āĻĻ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āϕ⧰āĻŋāĻŦāϞ⧈ āĻ•āĻŋ āĻ•āĻŽā§āĻĒāĻŋāϤ āĻšāϝāĻŧ ?


Options: (a) Teeth (b) Tongue (c) Vocal cords (d) Bones


Ans: (c) Vocal cords


Explanation: Air passing through vocal cords makes them vibrate and produce sound. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ¸ā§āĻŦā§°āϤāĻ¨ā§āĻ¤ā§ā§°ā§€ā§° āĻŽāĻžāĻœā§‡ā§°ā§‡ āĻŦāĻžāϝāĻŧ⧁ āĻĒāĻžā§° āĻš'āϞ⧇ āϏāĻŋāĻšāρāϤ āĻ•āĻŽā§āĻĒāĻŋāϤ āĻšāϝāĻŧ āφ⧰⧁ āĻļāĻŦā§āĻĻ āϏ⧃āĻˇā§āϟāĻŋ āϕ⧰⧇āĨ¤


Q12. Why is the thumb important ? / āĻŦ⧁āĻĸāĻŧāĻž āφāϙ⧁āϞāĻŋ āĻ•āĻŋāϝāĻŧ āϗ⧁⧰⧁āĻ¤ā§āĻŦāĻĒā§‚ā§°ā§āĻŖ ?


Options: (a) Helps grip objects (b) Helps breathing (c) Helps hearing (d) Helps smelling


Ans: (a) Helps grip objects


Explanation: The thumb allows us to hold and control objects firmly. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻŦ⧁āĻĸāĻŧāĻž āφāϙ⧁āϞāĻŋāϝāĻŧ⧇ āĻŦāĻ¸ā§āϤ⧁ āĻĻ⧃āĻĸāĻŧāĻ­āĻžā§ąā§‡ āϧ⧰āĻŋāĻŦāϞ⧈ āϏāĻšāĻžāϝāĻŧ āϕ⧰⧇āĨ¤


Q13. The thumb can touch ______. / āĻŦ⧁āĻĸāĻŧāĻž āφāϙ⧁āϞāĻŋāϝāĻŧ⧇ ______ āĻ¸ā§āĻĒā§°ā§āĻļ āϕ⧰āĻŋāĻŦ āĻĒāĻžā§°ā§‡āĨ¤


Options: (a) Two fingers (b) Three fingers (c) All other fingers (d) No fingers


Ans: (c) All other fingers


Explanation: This special ability gives humans a strong grip. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻāχ āĻŦāĻŋāĻļ⧇āώ āĻ•ā§āώāĻŽāϤāĻžāχ āĻŽāĻžāύ⧁āĻšāĻ• āĻŽāϜāĻŦ⧁āϤ āϧ⧰āĻž āĻļāĻ•ā§āϤāĻŋ āĻĻāĻŋāϝāĻŧ⧇āĨ¤


Q14. What does the skin produce in sunlight ? / āĻ¸ā§‚ā§°ā§āϝ⧰ āĻĒā§‹āĻšā§°āϤ āĻ›āĻžāϞ⧇ āĻ•āĻŋ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āϕ⧰⧇ ?


Options: (a) Calcium (b) Melanin (c) Keratin (d) Insulin


Ans: (b) Melanin


Explanation: Melanin protects the skin from harmful UV rays. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻŽā§‡āϞāĻžāύāĻŋāύ⧇ āĻ•ā§āώāϤāĻŋāĻ•āĻžā§°āĻ• UV ā§°āĻļā§āĻŽāĻŋā§° āĻĒā§°āĻž āĻ›āĻžāϞāĻ• āϏ⧁⧰āĻ•ā§āώāĻž āĻĻāĻŋāϝāĻŧ⧇āĨ¤


Q15. Melanin protects us from ______ rays. / āĻŽā§‡āϞāĻžāύāĻŋāύ⧇ āφāĻŽāĻžāĻ• ______ ā§°āĻļā§āĻŽāĻŋā§° āĻĒā§°āĻž ā§°āĻ•ā§āώāĻž āϕ⧰⧇āĨ¤


Options: (a) X-rays (b) Gamma rays (c) UV rays (d) Radio waves


Ans: (c) UV rays


Explanation: UV rays from sunlight can damage the skin, and melanin helps protect it. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ¸ā§‚ā§°ā§āϝ⧰ UV ā§°āĻļā§āĻŽāĻŋāϝāĻŧ⧇ āĻ›āĻžāϞ⧰ āĻ•ā§āώāϤāĻŋ āϕ⧰āĻŋāĻŦ āĻĒāĻžā§°ā§‡, āĻŽā§‡āϞāĻžāύāĻŋāύ⧇ āχāϝāĻŧāĻžā§° āĻĒā§°āĻž ā§°āĻ•ā§āώāĻž āϕ⧰⧇āĨ¤


Q16. Why do lips crack in winter ? / āĻļā§€āϤāĻ•āĻžāϞāϤ āĻ“āρāĻ  āĻ•āĻŋāϝāĻŧ āĻĢāĻžāĻŸā§‡ ?


Options: (a) Too much water (b) Dry cold air (c) Too much food (d) Hot weather


Ans: (b) Dry cold air


Explanation: Cold dry air removes moisture from the lips. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ āĻžāĻŖā§āĻĄāĻž āĻļ⧁āĻ•āĻžāύ āĻŦāĻžāϝāĻŧā§ā§ąā§‡ āĻ“āρāĻ ā§° āĻ†ā§°ā§āĻĻā§ā§°āϤāĻž āĻ•āĻŽāĻžāχ āĻĻāĻŋāϝāĻŧ⧇āĨ¤


Q17. Lips dry quickly because they do not have ______. / āĻ“āρāĻ āϤ ______ āύāĻžāĻĨāĻžāϕ⧇ āĻŦāĻžāĻŦ⧇ āϏ⧋āύāĻ•āĻžāϞ⧇ āĻļ⧁āĻ•āĻžāϝāĻŧāĨ¤


Options: (a) Bones (b) Oil glands (c) Hair (d) Teeth


Ans: (b) Oil glands


Explanation: Lips do not have oil glands to keep them naturally moist. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ“āρāĻ āϤ āϤ⧇āϞ āĻ‰ā§ŽāĻĒāĻ¨ā§āύ āϕ⧰āĻž āĻ—ā§ā§°āĻ¨ā§āĻĨāĻŋ āύāĻžāĻĨāĻžāϕ⧇, āϏ⧇āϝāĻŧ⧇āĻšā§‡ āϏ⧋āύāĻ•āĻžāϞ⧇ āĻļ⧁āĻ•āĻžāϝāĻŧāĨ¤


Q18. Why are cotton clothes comfortable in summer ? / āĻ—ā§°āĻŽāĻ•āĻžāϞāϤ āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒā§‹ā§° āĻ•āĻŋāϝāĻŧ āφ⧰āĻžāĻŽāĻĻāĻžāϝāĻŧāĻ• ?


Options: (a) They are heavy (b) They absorb sweat (c) They are shiny (d) They are thick


Ans: (b) They absorb sweat


Explanation: Cotton absorbs sweat and keeps the body dry. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒ⧋⧰⧇ āϘāĻžāĻŽ āĻļā§‹āώāĻŖ āϕ⧰āĻŋ āĻļ⧰⧀⧰ āĻļ⧁āĻ•āĻžāύ ā§°āĻžāϖ⧇āĨ¤


Q19. Cotton helps cool the body because sweat ______. / āĻ•āĻĒāĻžāĻšā§€ āĻ•āĻžāĻĒ⧋⧰⧇ āĻļ⧰⧀⧰ āĻ āĻžāĻŖā§āĻĄāĻž ā§°āĻžāϖ⧇ āĻ•āĻžā§°āĻŖ āϘāĻžāĻŽ ______āĨ¤


Options: (a) Freezes (b) Changes colour (c) Evaporates quickly (d) Becomes heavier


Ans: (c) Evaporates quickly


Explanation: Fast evaporation of sweat removes heat from the body. āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: āϘāĻžāĻŽ āϏ⧋āύāĻ•āĻžāϞ⧇ āĻŦāĻžāĻˇā§āĻĒā§€āĻ­ā§‚āϤ āĻš'āϞ⧇ āĻļ⧰⧀⧰⧰ āϤāĻžāĻĒ āĻ•āĻŽā§‡āĨ¤


Q20. Which of the following is correct ? / āϤāϞ⧰ āϕ⧋āύāĻŸā§‹ āĻļ⧁āĻĻā§āϧ ?


Options: (a) Ears help us learn speech (b) Melanin protects skin from UV rays (c) Cotton absorbs sweat (d) All of these


Ans: (d) All of these