Amazing Human Body Facts (āĻāĻļā§āĻā§°ā§āϝāĻāύāĻ āĻŽāĻžāĻ¨ā§ą āĻļā§°ā§ā§°ā§° āϤāĻĨā§āϝ) - 2
1) Why is our skull hard ? / āĻāĻŽāĻžā§° āĻŽā§ā§°ā§° āĻā§āϞ (Skull) āĻāĻŋāϝāĻŧ āĻāĻ āĻŋāύ ?
- The skull protects the brain, which is very soft and delicate. (āĻŽā§ā§°ā§° āĻā§āϞ⧠āĻŽāĻāĻā§āĻ āϏā§ā§°āĻā§āώāĻž āĻĻāĻŋāϝāĻŧā§, āϝāĻŋ āĻ āϤāĻŋ āĻā§āĻŽāϞ āĻā§°ā§ āϏāĻāĻŦā§āĻĻāύāĻļā§āϞāĨ¤)
- It acts like a strong helmet around the brain. (āĻ āĻŽāĻāĻā§ā§° āĻāĻžā§°āĻŋāĻāĻĢāĻžāϞ⧠āĻāĻāĻž āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻšā§āϞāĻŽā§āĻā§° āĻĻā§°ā§ āĻāĻžāĻŽ āĻā§°ā§āĨ¤)
- If we fall or get hit, the skull absorbs much of the impact. (āĻāĻŽāĻŋ āĻĒā§°āĻŋāϞ⧠āĻŦāĻž āĻāĻāĻžāϤ āĻĒāĻžāϞ⧠āĻŽā§ā§°ā§° āĻā§āϞ⧠āĻāĻāĻžāϤ⧰ āĻŦāĻšā§ āĻ āĻāĻļ āĻļā§āώāĻŖ āĻā§°ā§āĨ¤)
- It prevents serious damage to the brain. (āĻāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻŽāĻāĻā§ā§° āĻā§ā§°ā§āϤ⧰ āĻā§āώāϤāĻŋ āĻšā§ā§ąāĻžā§° āĻĒā§°āĻž ā§°āĻā§āώāĻž āĻĒāĻžāϝāĻŧāĨ¤)
- The skull is made of strong bones joined together. (āĻŽā§ā§°ā§° āĻā§āϞ āĻŦāĻšā§ āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻ āϏā§āĻĨāĻŋ (Bone) āϞāĻ āϞāĻžāĻāĻŋ āĻāĻ āĻŋāϤāĨ¤)
- So it keeps our brain safe and protected. (āϏā§āϝāĻŧā§āĻšā§ āĻ āĻŽāĻāĻā§āĻ āϏā§ā§°āĻā§āώāĻŋāϤ āĻā§°āĻŋ ā§°āĻžāĻā§āĨ¤)
2) Why do we vomit ? / āĻāĻŽāĻŋ āĻŦāĻŽāĻŋ āĻāĻŋāϝāĻŧ āĻā§°ā§āĻ ?
- Vomiting happens when the stomach wants to remove something harmful. (āĻĒāĻžāĻāϏā§āĻĨāϞā§āϝāĻŧā§ āĻā§āώāϤāĻŋāĻāĻžā§°āĻ āĻŦāϏā§āϤ⧠āĻŦāĻžāĻšāĻŋā§° āĻā§°āĻŋāĻŦāϞ⧠āĻā§āώā§āĻāĻž āĻā§°āĻŋāϞ⧠āĻŦāĻŽāĻŋ āĻšāϝāĻŧāĨ¤)
- It may be caused by spoiled food, infection, or motion sickness. (āĻŦā§āϝāĻŧāĻž āĻāĻžāĻĻā§āϝ, āϏāĻāĻā§āϰāĻŽāĻŖ āĻŦāĻž āϝāĻžāϤā§ā§°āĻžāĻāύāĻŋāϤ āĻ āϏā§āϏā§āĻĨāϤāĻžā§° āĻŦāĻžāĻŦā§ āĻŦāĻŽāĻŋ āĻš'āĻŦ āĻĒāĻžā§°ā§āĨ¤)
- The brain sends a signal to empty the stomach. (āĻŽāĻāĻā§ā§ąā§ āĻĒāĻžāĻāϏā§āĻĨāϞ⧠āĻāĻžāϞ⧠āĻā§°āĻŋāĻŦāϞ⧠āϏāĻāĻā§āϤ āĻĒāĻ āĻžāϝāĻŧāĨ¤)
- The stomach muscles push the contents upward. (āĻĒāĻžāĻāϏā§āĻĨāϞā§ā§° āĻĒā§āĻļā§āĻŦā§ā§°ā§ āĻāĻŋāϤ⧰⧰ āĻŦāϏā§āϤ⧠āĻāĻĒā§°āϞ⧠āĻ ā§āϞāĻŋ āĻĻāĻŋāϝāĻŧā§āĨ¤)
- This helps remove harmful substances from the body. (āĻāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻā§āώāϤāĻŋāĻāĻžā§°āĻ āĻĒāĻĻāĻžā§°ā§āĻĨ āĻļā§°ā§ā§°ā§° āĻĒā§°āĻž āĻŦāĻžāĻšāĻŋā§° āĻšāϝāĻŧāĨ¤)
- So vomiting is a protective action. (āϏā§āϝāĻŧā§āĻšā§ āĻŦāĻŽāĻŋ āĻļā§°ā§ā§°ā§° āĻāĻ āϏā§ā§°āĻā§āώāĻžāĻŽā§āϞāĻ āĻĒā§ā§°āϤāĻŋāĻā§ā§°āĻŋāϝāĻŧāĻžāĨ¤)
3) Why does white pus form in a wound ? / āĻāĻžāĻāϤ āĻŦāĻāĻž āĻĒā§āĻāĻ āĻāĻŋāϝāĻŧ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧ
- When germs enter a wound, white blood cells fight them. (āĻāĻžāĻāϤ āĻā§ā§ąāĻžāĻŖā§ āϏā§āĻŽāĻžāϞ⧠āĻļā§āĻŦā§āϤ ā§°āĻā§āϤāĻāĻŖāĻŋāĻāĻžāĻ (White Blood Cells) āϏāĻŋāĻšāĻāϤ⧰ āϏā§āϤ⧠āϝā§āĻāĻā§āĨ¤)
- During this fight, some cells and germs die. (āĻāĻ āϝā§āĻāĻā§° āϏāĻŽāϝāĻŧāϤ āĻāĻŋāĻā§āĻŽāĻžāύ āĻā§āώ āĻā§°ā§ āĻā§ā§ąāĻžāĻŖā§ āĻŽā§°āĻŋ āϝāĻžāϝāĻŧāĨ¤)
- The dead cells and bacteria form a thick white fluid. (āĻŽā§āϤ āĻā§āώ āĻā§°ā§ āĻŦā§āĻā§āĻā§ā§°āĻŋāϝāĻŧāĻžāĻ āĻŽāĻŋāϞāĻŋ āĻāύ āĻŦāĻāĻž āϤ⧰āϞ āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤)
- This fluid is called pus. (āĻāĻ āϤ⧰āϞāĻ āĻĒā§āĻāĻ (Pus) āĻŦā§āϞāĻž āĻšāϝāĻŧāĨ¤)
- Pus shows that the body is fighting infection. (āĻĒā§āĻāĻā§ āĻĻā§āĻā§ā§ąāĻžāϝāĻŧ āϝ⧠āĻļā§°ā§ā§°ā§ āϏāĻāĻā§āϰāĻŽāĻŖā§° āĻŦāĻŋā§°ā§āĻĻā§āϧ⧠āϝā§āĻāĻ āĻĻāĻŋāĻā§āĨ¤)
- Cleaning the wound helps it heal properly. (āĻāĻžāĻ āĻĒā§°āĻŋāώā§āĻāĻžā§° ā§°āĻžāĻāĻŋāϞ⧠āϏā§āύāĻāĻžāϞ⧠āĻāĻžāϞ āĻšāϝāĻŧāĨ¤)
4) Why should we brush our teeth every day ? / āĻāĻŽāĻŋ āĻĒā§ā§°āϤāĻŋāĻĻāĻŋāύ⧠āĻĻāĻžāĻāϤ āĻāĻŋāϝāĻŧ āĻŽāĻžāĻāĻŋāĻŦ āϞāĻžāĻā§ ?
- Food particles stick to our teeth after eating. (āĻā§ā§ąāĻžā§° āĻĒāĻŋāĻāϤ āĻāĻžāĻĻā§āϝ⧰ āϏ⧰⧠āĻāĻŖāĻžāĻŦā§ā§° āĻĻāĻžāĻāϤāϤ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§āĨ¤)
- If not cleaned, bacteria grow on them. (āĻĒā§°āĻŋāώā§āĻāĻžā§° āύāĻā§°āĻŋāϞ⧠āϤāĻžāϤ āĻŦā§āĻā§āĻā§ā§°āĻŋāϝāĻŧāĻž āĻŦā§āĻĻā§āϧāĻŋ āĻĒāĻžāϝāĻŧāĨ¤)
- These bacteria can cause cavities and bad smell. (āĻāĻ āĻŦā§āĻā§āĻā§ā§°āĻŋāϝāĻŧāĻžāĻ āĻĻāĻžāĻāϤ⧰ āĻāĻžāĻāϤ (Cavity) āĻā§°ā§ āĻŽā§āĻā§° āĻĻā§ā§°ā§āĻāύā§āϧ āϏā§āώā§āĻāĻŋ āĻā§°āĻŋāĻŦ āĻĒāĻžā§°ā§āĨ¤)
- Brushing removes food and germs. (āĻĻāĻžāĻāϤ āĻŽāĻžāĻāĻŋāϞ⧠āĻāĻžāĻĻā§āϝāĻāĻŖāĻž āĻā§°ā§ āĻā§ā§ąāĻžāĻŖā§ āĻāĻāϤ⧰āĻŋ āϝāĻžāϝāĻŧāĨ¤)
- It keeps teeth strong and healthy. (āĻāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻĻāĻžāĻāϤ āĻŽāĻāĻŦā§āϤ āĻā§°ā§ āϏā§āϏā§āĻĨ āĻĨāĻžāĻā§āĨ¤)
- So brushing twice daily is important. (āϏā§āϝāĻŧā§āĻšā§ āĻĻāĻŋāύ⧠āĻĻā§āĻŦāĻžā§° āĻĻāĻžāĻāϤ āĻŽāĻžāĻāĻž āĻ āϤā§āϝāύā§āϤ āĻĒā§ā§°āϝāĻŧā§āĻāύā§āϝāĻŧāĨ¤)
5) Why do we need to take a bath ? / āĻāĻŽāĻŋ āĻāĻž āϧā§āĻŦ āϞāĻžāĻā§ āĻāĻŋāϝāĻŧ ?
- During the day, dirt and sweat collect on our skin. (āĻĻāĻŋāύāĻā§ā§° āĻāĻŋāϤ⧰āϤ āĻāĻŽāĻžā§° āĻāĻžāϞāϤ āĻŽāϞāĻŋ āĻā§°ā§ āĻāĻžāĻŽ āĻāĻŽāĻž āĻšāϝāĻŧāĨ¤)
- Germs also stick to our body. (āĻā§ā§ąāĻžāĻŖā§āĻ āĻāĻŽāĻžā§° āĻļā§°ā§ā§°āϤ āϞāĻžāĻāĻŋ āĻĨāĻžāĻā§āĨ¤)
- Bathing removes dirt and bacteria. (āĻāĻž āϧā§āϞ⧠āĻŽāϞāĻŋ āĻā§°ā§ āĻŦā§āĻā§āĻā§ā§°āĻŋāϝāĻŧāĻž āĻāĻāϤ⧰āĻŋ āϝāĻžāϝāĻŧāĨ¤)
- It keeps the skin fresh and clean. (āĻ āĻāĻžāϞāĻ āĻĒā§°āĻŋāώā§āĻāĻžā§° āĻā§°ā§ āϏāϤā§āĻ ā§°āĻžāĻā§āĨ¤)
- Bathing also prevents infections. (āĻāĻž āϧā§ā§ąāĻžāĻ āϏāĻāĻā§āϰāĻŽāĻŖ ā§°ā§āϧ āĻā§°āĻžāϤ⧠āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤)
- So it is important for good hygiene. (āϏā§āϝāĻŧā§āĻšā§ āĻāĻžāϞ āϏā§āĻŦāĻžāϏā§āĻĨā§āϝāĻŦāĻŋāϧāĻŋā§° āĻŦāĻžāĻŦā§ āĻāĻž āϧā§ā§ąāĻž āĻ āϤāĻŋ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§ā§°ā§āĻŖāĨ¤)
6) Why does our height increase ? (āĻāĻŽāĻžā§° āĻāĻā§āĻāϤāĻž āĻāĻŋāϝāĻŧ āĻŦāĻžāĻĸāĻŧā§ ?)
- Children grow because their bones grow longer. (āĻļāĻŋāĻļā§ā§° āĻāĻā§āĻāϤāĻž āĻŦāĻžāĻĸāĻŧā§ āĻāĻžā§°āĻŖ āϤā§āĻāĻāϞā§āĻā§° āĻ āϏā§āĻĨāĻŋ āĻĻā§āĻāϞ āĻšāϝāĻŧāĨ¤)
- Growth plates at the ends of bones help in this process. (āĻ āϏā§āĻĨāĻŋā§° āĻļā§āώ āĻ āĻāĻļāϤ āĻĨāĻāĻž āĻā§ā§°ā§āĻĨ āĻĒā§āϞā§āĻā§ āĻāĻ āĻāĻžāĻŽāϤ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤)
- Growth hormones support bone development. (āĻŦā§āĻĻā§āϧāĻŋā§° āĻšā§°āĻŽā§āύ⧠āĻ āϏā§āĻĨāĻŋā§° āĻŦāĻŋāĻāĻžāĻļāϤ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤)
- Healthy food and sleep also help growth. (āĻĒā§āώā§āĻāĻŋāĻā§° āĻāĻžāĻĻā§āϝ āĻā§°ā§ āĻāĻžāϞ āĻā§āĻĒāύāĻŋāĻ āĻŦā§āĻĻā§āϧāĻŋāϤ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤)
- As bones lengthen, height increases. (āĻ āϏā§āĻĨāĻŋ āĻĻā§āĻāϞ āĻšā§ā§ąāĻžā§° āϞāĻā§ āϞāĻā§ āĻāĻā§āĻāϤāĻž āĻŦā§āĻĻā§āϧāĻŋ āĻĒāĻžāϝāĻŧāĨ¤)
- Growth slows down after teenage years. (āĻā§āĻļā§ā§°ā§° āĻĒāĻŋāĻāϤ āĻŦā§āĻĻā§āϧāĻŋ āϧā§ā§° āĻšāϝāĻŧāĨ¤)
7) How do we smell things ? (āĻāĻŽāĻŋ āĻā§āύā§āϧ āĻā§āύā§āĻā§ āĻĒāĻžāĻāĻ ?)
- Tiny smell particles float in the air. āĻā§āύā§āϧ⧰ āϏ⧰⧠āϏ⧰⧠āĻāĻŖāĻžāĻŦā§ā§° āĻŦāĻžāϝāĻŧā§āϤ āĻāĻžāĻāĻšāĻŋ āĻĨāĻžāĻā§āĨ¤)
- When we breathe in, they enter our nose. (āĻāĻŽāĻŋ āĻļā§āĻŦāĻžāϏ āϞ'āϞ⧠āϏā§āĻ āĻāĻŖāĻžāĻŦā§ā§° āύāĻžāĻāϤ āϏā§āĻŽāĻžāϝāĻŧāĨ¤)
- Special cells inside the nose detect them. (āύāĻžāĻā§° āĻāĻŋāϤ⧰⧰ āĻŦāĻŋāĻļā§āώ āĻā§āώ⧠āϏā§āĻāĻŦā§ā§° āĻāĻŋāύāĻžāĻā§āϤ āĻā§°ā§āĨ¤)
- These cells send signals to the brain. (āĻāĻ āĻā§āώāĻŦā§ā§°ā§ āĻŽāĻāĻā§āϞ⧠āϏāĻāĻā§āϤ āĻĒāĻ āĻžāϝāĻŧāĨ¤)
- The brain identifies the smell. (āĻŽāĻāĻā§ā§ąā§ āĻā§āύā§āϧāĻā§ āĻāĻŋāύāĻžāĻā§āϤ āĻā§°ā§āĨ¤)
- That is how we recognize different scents. (āĻāĻāĻĻā§°ā§āĻ āĻāĻŽāĻŋ āĻŦāĻŋāĻāĻŋāύā§āύ āĻā§āύā§āϧ āĻāĻŋāύāĻŋāĻŦ āĻĒāĻžā§°ā§āĻāĨ¤)
8) Can we speak without ears ? (āĻāĻžāĻŖ āύā§āĻšā§ā§ąāĻžāĻā§ āĻāĻŽāĻŋ āĻāĻĨāĻž āĻ'āĻŦ āĻĒāĻžā§°āĻŋāĻŽāύ⧠?)
- Speaking uses the voice box and mouth. (āĻāĻĨāĻž āĻ'āĻŦāϞ⧠āϏā§āĻŦā§°āϝāύā§āϤā§ā§° āĻā§°ā§ āĻŽā§āĻ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧāĨ¤)
- But hearing helps us learn how to speak clearly. (āĻāĻŋāύā§āϤ⧠āĻļā§āύāĻŋāĻŦ āĻĒā§°āĻžāĻā§ā§ąā§ āĻāĻŽāĻžāĻ āϏā§āĻĒāώā§āĻāĻā§ āĻāĻĨāĻž āĻ'āĻŦ āĻļāĻŋāĻāĻžāϝāĻŧāĨ¤)
- People who cannot hear may find it harder to speak normally. (āϝāĻŋāϏāĻāϞ⧠āĻļā§āύāĻŋāĻŦ āύā§ā§ąāĻžā§°ā§, āϤā§āĻāĻāϞā§āĻā§° āĻŦāĻžāĻŦā§ āϏā§āĻŦāĻžāĻāĻžā§ąāĻŋāĻāĻāĻžā§ąā§ āĻāĻĨāĻž āĻā§ā§ąāĻž āĻāĻ āĻŋāύ āĻš'āĻŦ āĻĒāĻžā§°ā§āĨ¤)
- They may need special training. (āϤā§āĻāĻāϞā§āĻāĻ āĻŦāĻŋāĻļā§āώ āĻĒā§ā§°āĻļāĻŋāĻā§āώāĻŖā§° āĻĒā§ā§°āϝāĻŧā§āĻāύ āĻš'āĻŦ āĻĒāĻžā§°ā§āĨ¤)
- Hearing helps control pronunciation and tone. (āĻļā§āύāĻŋāĻŦ āĻĒā§°āĻžāĻā§ā§ąā§ āĻāĻā§āĻāĻžā§°āĻŖ āĻā§°ā§ āϏā§āĻŦā§° āύāĻŋāϝāĻŧāύā§āϤā§ā§°āĻŖ āĻā§°āĻžāϤ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤)
- So ears are important for proper speech learning. (āϏā§āϝāĻŧā§āĻšā§ āϏāĻ āĻŋāĻāĻāĻžā§ąā§ āĻāĻĨāĻž āĻ'āĻŦ āĻļāĻŋāĻāĻŋāĻŦāϞ⧠āĻāĻžāĻŖ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§ā§°ā§āĻŖāĨ¤)
9) Where does our voice come from ? (āĻāĻŽāĻžā§° āĻŽāĻžāϤ āĻ'ā§° āĻĒā§°āĻž āĻāĻšā§ ? )
- Our voice is produced in the voice box (larynx). (āĻāĻŽāĻžā§° āĻŽāĻžāϤ āϏā§āĻŦā§°āϝāύā§āϤā§ā§° (Larynx) āϤ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧāĨ¤)
- Inside it are vocal cords. (āĻāϝāĻŧāĻžā§° āĻāĻŋāϤ⧰āϤ āϏā§āĻŦā§°āϤāύā§āϤā§ā§°ā§ (Vocal Cords) āĻĨāĻžāĻā§āĨ¤)
- When air passes through them, they vibrate. (āĻŦāĻžāϝāĻŧā§ āĻāϝāĻŧāĻžā§° āĻŽāĻžāĻā§ā§°ā§ āĻĒāĻžā§° āĻš'āϞ⧠āĻ āĻāĻŽā§āĻĒāĻŋāϤ āĻšāϝāĻŧāĨ¤)
- These vibrations create sound. (āĻāĻ āĻāĻŽā§āĻĒāύ⧰ āĻĢāϞāϤ āĻļāĻŦā§āĻĻ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧāĨ¤)
- The mouth and tongue shape the sound into words. (āĻŽā§āĻ āĻā§°ā§ āĻāĻŋāĻāĻžāĻ āĻļāĻŦā§āĻĻāĻ āĻļāĻŦā§āĻĻ āĻŦāĻž āĻŦāĻžāĻā§āϝāϤ ā§°ā§āĻĒ āĻĻāĻŋāϝāĻŧā§āĨ¤)
- So voice comes from vibrating vocal cords. (āϏā§āϝāĻŧā§āĻšā§ āĻāĻŽā§āĻĒāĻŋāϤ āϏā§āĻŦā§°āϤāύā§āϤā§ā§°ā§ā§° āĻĒā§°āĻž āĻŽāĻžāϤ āϏā§āώā§āĻāĻŋ āĻšāϝāĻŧāĨ¤)
10) Why is the thumb so important ? (āĻŦā§āĻĸāĻŧāĻž āĻāĻā§āϞāĻŋ āĻāĻŋāϝāĻŧ āĻāĻŽāĻžāύ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§ā§°ā§āĻŖ ?)
- The thumb can move in different directions. (āĻŦā§āĻĸāĻŧāĻž āĻāĻā§āϞāĻŋāϝāĻŧā§ āĻŦāĻŋāĻāĻŋāύā§āύ āĻĻāĻŋāĻļāϤ āϞ⧰āĻā§° āĻā§°āĻŋāĻŦ āĻĒāĻžā§°ā§āĨ¤)
- It can touch all other fingers. (āĻ āĻāύ āϏāĻāϞ⧠āĻāĻā§āϞāĻŋāĻ āϏā§āĻĒā§°ā§āĻļ āĻā§°āĻŋāĻŦ āĻĒāĻžā§°ā§āĨ¤)
- This allows us to grip objects firmly. (āĻāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻāĻŽāĻŋ āĻŦāϏā§āϤ⧠āĻĻā§āĻĸāĻŧāĻāĻžā§ąā§ āϧ⧰āĻŋāĻŦ āĻĒāĻžā§°ā§āĻāĨ¤)
- We can hold a pencil or button a shirt. (āĻāĻŽāĻŋ āĻĒā§āĻā§āĻāĻŋāϞ āϧ⧰āĻŋāĻŦ āĻŦāĻž āĻāĻžā§°ā§āĻā§° āĻŦā§āĻāĻžāĻŽ āϞāĻāĻžāĻŦ āĻĒāĻžā§°ā§āĻāĨ¤)
- Without the thumb, gripping would be difficult. (āĻŦā§āĻĸāĻŧāĻž āĻāĻā§āϞāĻŋ āύāĻžāĻĨāĻžāĻāĻŋāϞ⧠āĻŦāϏā§āϤ⧠āϧ⧰āĻž āĻāĻ āĻŋāύ āĻš'āϞāĻšā§āĻāϤā§āύāĨ¤)
- It plays a key role in daily tasks. (āĻĻā§āύāύā§āĻĻāĻŋāύ āĻāĻžāĻŽāϤ āĻāϝāĻŧāĻžā§° āĻŦāĻŋāĻļā§āώ āĻā§āĻŽāĻŋāĻāĻž āĻāĻā§āĨ¤)
11) Why does our skin become darker in the sun ? (ā§°'āĻĻāϤ āĻāĻŽāĻžā§° āĻāĻžāϞ āĻāĻŋāϝāĻŧ āĻāĻžāĻĸāĻŧ āĻšāϝāĻŧ ?)
- Sunlight contains ultraviolet (UV) rays. (āϏā§ā§°ā§āϝ⧰ āĻĒā§āĻšā§°āϤ āĻ āϤāĻŋāĻŦā§āĻā§āύā§āϝāĻŧāĻž (UV) ā§°āĻļā§āĻŽāĻŋ āĻĨāĻžāĻā§āĨ¤)
- The skin produces more melanin to protect itself. (āύāĻŋāĻāĻā§ āϏā§ā§°āĻā§āώāĻž āĻĻāĻŋāĻŦāϞ⧠āĻāĻžāϞ⧠āĻ āϧāĻŋāĻ āĻŽā§āϞāĻžāύāĻŋāύ āĻā§āĻĒāύā§āύ āĻā§°ā§āĨ¤)
- Melanin acts like a natural shield. (āĻŽā§āϞāĻžāύāĻŋāύ⧠āĻĒā§ā§°āĻžāĻā§āϤāĻŋāĻ āĻĸāĻžāϞ⧰ āĻĻā§°ā§ āĻāĻžāĻŽ āĻā§°ā§āĨ¤)
- More melanin makes skin look darker. (āĻ āϧāĻŋāĻ āĻŽā§āϞāĻžāύāĻŋāύ⧠āĻāĻžāϞ āĻāĻžāĻĸāĻŧ āĻĻā§āĻāĻž āϝāĻžāϝāĻŧāĨ¤)
- It helps reduce sun damage. (āĻ āϏā§ā§°ā§āϝ⧰ āĻā§āώāϤāĻŋ āĻāĻŽāĻžāϝāĻŧāĨ¤)
- So the skin becomes darker for protection. (āϏā§āϝāĻŧā§āĻšā§ āϏā§ā§°āĻā§āώāĻžā§° āĻŦāĻžāĻŦā§ āĻāĻžāϞ āĻāĻžāĻĸāĻŧ āĻšāϝāĻŧāĨ¤)
12) Why do lips crack in winter ? (āĻļā§āϤāĻāĻžāϞāϤ āĻāĻāĻ āĻāĻŋāϝāĻŧ āĻĢāĻžāĻā§ ?)
- Cold air is dry and removes moisture. (āĻ āĻžāĻŖā§āĻĄāĻž āĻŦāĻžāϝāĻŧā§ āĻļā§āĻāĻžāύ āĻšāϝāĻŧ āĻā§°ā§ āĻā§°ā§āĻĻā§ā§°āϤāĻž āĻāĻāϤ⧰āĻžāĻ āĻĻāĻŋāϝāĻŧā§āĨ¤)
- Lips do not have oil glands. (āĻāĻāĻ āϤ āϤā§āϞ āĻā§āĻĒāύā§āύ āĻā§°āĻž āĻā§ā§°āύā§āĻĨāĻŋ āύāĻžāĻĨāĻžāĻā§āĨ¤)
- So they dry out quickly. (āϏā§āϝāĻŧā§āĻšā§ āĻāĻāĻ āϏā§āύāĻāĻžāϞ⧠āĻļā§āĻāĻžāĻ āϝāĻžāϝāĻŧāĨ¤)
- Dry lips become rough and cracked. (āĻļā§āĻāĻžāύ āĻāĻāĻ āĻāĻšāĻāĻž āĻā§°ā§ āĻĢāĻžāĻāĻž āĻšāϝāĻŧāĨ¤)
- Lip balm helps keep lips moist. (āϞāĻŋāĻĒ āĻŦāĻžāĻŽ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻā§°āĻŋāϞ⧠āĻāĻāĻ āϏāĻŋāĻā§āϤ āĻĨāĻžāĻā§āĨ¤)
- So winter often causes cracked lips. (āϏā§āϝāĻŧā§āĻšā§ āĻļā§āϤāĻāĻžāϞāϤ āĻāĻāĻ āĻĒā§ā§°āĻžāϝāĻŧā§ āĻĢāĻžāĻā§āĨ¤)
13) Why do we prefer cotton clothes in summer ? (āĻā§°āĻŽāĻāĻžāϞāϤ āĻāĻŽāĻŋ āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§° āĻāĻŋāϝāĻŧ āĻĒāĻāύā§āĻĻ āĻā§°ā§āĻ ?)
- Cotton absorbs sweat easily. (āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§°ā§ āϏāĻšāĻā§ āĻāĻžāĻŽ āĻļā§āώāĻŖ āĻā§°ā§āĨ¤)
- It allows air to pass through. (āĻ āĻŦāĻžāϝāĻŧā§ āĻāϞāĻžāĻāϞ āĻš'āĻŦāϞ⧠āĻĻāĻŋāϝāĻŧā§āĨ¤)
- Sweat evaporates faster in cotton. (āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§°āϤ āĻāĻžāĻŽ āϏā§āύāĻāĻžāϞ⧠āĻŦāĻžāώā§āĻĒā§āĻā§āϤ āĻšāϝāĻŧāĨ¤)
- This cools the body. (āĻāϝāĻŧāĻžā§° āĻĢāϞāϤ āĻļā§°ā§ā§° āĻ āĻžāĻŖā§āĻĄāĻž āĻĨāĻžāĻā§āĨ¤)
- Cotton is light and comfortable. (āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§° āĻĒāĻžāϤāϞ āĻā§°ā§ āĻā§°āĻžāĻŽāĻĻāĻžāϝāĻŧāĻāĨ¤)
- So it is good for hot weather. (āϏā§āϝāĻŧā§āĻšā§ āĻā§°āĻŽ āĻŦāϤ⧰āϤ āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§° āĻāϤā§āϤāĻŽāĨ¤)
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MCQ
Q1. Why do we need to take a bath ? / āĻāĻŽāĻŋ āĻāĻž āϧā§āĻŦ āϞāĻžāĻā§ āĻāĻŋāϝāĻŧ ?
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§āϝāĻžāĻā§āϝāĻž: āĻāĻž āϧā§āϞ⧠āĻļā§°ā§ā§°ā§° āĻŽāϞāĻŋ, āĻāĻžāĻŽ āĻā§°ā§ āĻā§ā§ąāĻžāĻŖā§ āĻāĻāϤ⧰āĻŋ āϝāĻžāϝāĻŧ āĻā§°ā§ āϏāĻāĻā§āϰāĻŽāĻŖā§° āĻĒā§°āĻž āϏā§ā§°āĻā§āώāĻž āĻĒā§ā§ąāĻž āϝāĻžāϝāĻŧāĨ¤
Q2. What collects on our skin during the day ? / āĻĻāĻŋāύāĻā§ā§° āĻāĻŋāϤ⧰āϤ āĻāĻŽāĻžā§° āĻāĻžāϞāϤ āĻāĻŋ āĻāĻŽāĻž 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§āϝāĻžāĻā§āϝāĻž: āĻĻā§āύāύā§āĻĻāĻŋāύ āĻāĻžāĻŽā§° āϏāĻŽāϝāĻŧāϤ āĻāĻžāϞāϤ āĻŽāϞāĻŋ āĻā§°ā§ āĻāĻžāĻŽ āĻāĻŽāĻž āĻšāϝāĻŧāĨ¤
Q3. Height increases because ______. / āĻāĻā§āĻāϤāĻž āĻŦāĻžāĻĸāĻŧā§ āĻāĻžā§°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§āϝāĻžāĻā§āϝāĻž: āĻļāĻŋāĻļā§ā§° āĻ āϏā§āĻĨāĻŋāĻŦā§ā§° āĻĻā§āĻāϞ āĻšā§ā§ąāĻžā§° āĻĢāϞāϤ āĻāĻā§āĻāϤāĻž āĻŦā§āĻĻā§āϧāĻŋ āĻĒāĻžāϝāĻŧāĨ¤
Q4. What helps bones grow ? / āĻ āϏā§āĻĨāĻŋ āĻŦā§āĻĻā§āϧāĻŋāϤ āĻāĻŋ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§ ?
Options: (a) Growth hormones (b) Dust (c) Tears (d) Sweat
Ans: (a) Growth hormones
Explanation: Growth hormones help bones develop and grow properly. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŦā§āĻĻā§āϧāĻŋā§° āĻšā§°āĻŽā§āύ⧠āĻ āϏā§āĻĨāĻŋā§° āϏāĻ āĻŋāĻ āĻŦāĻŋāĻāĻžāĻļ āĻā§°ā§ āĻŦā§āĻĻā§āϧāĻŋāϤ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤
Q5. Which of these also helps growth ? / āĻāϝāĻŧāĻžā§° āĻāĻŋāϤ⧰āϤ āĻā§āύāĻā§ā§ąā§ āĻŦā§āĻĻā§āϧāĻŋāϤ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§ ?
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§āϝāĻžāĻā§āϝāĻž: āĻĒā§āώā§āĻāĻŋāĻā§° āĻāĻžāĻĻā§āϝ āĻā§°ā§ āĻĒā§°ā§āϝāĻžāĻĒā§āϤ āĻā§āĻĒāύāĻŋ āϏā§āϏā§āĻĨ āĻŦā§āĻĻā§āϧāĻŋā§° āĻŦāĻžāĻŦā§ āĻĒā§ā§°āϝāĻŧā§āĻāύā§āϝāĻŧāĨ¤
Q6. How do smell particles enter our body ? / āĻā§āύā§āϧ⧰ āĻāĻŖāĻžāĻŦā§ā§° āĻā§āύā§āĻā§ āĻļā§°ā§ā§°āϤ āϏā§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§āϝāĻžāĻā§āϝāĻž: āĻāĻŽāĻŋ āĻļā§āĻŦāĻžāϏ āϞ'āϞ⧠āĻā§āύā§āϧ⧰ āĻāĻŖāĻžāĻŦā§ā§° āύāĻžāĻāϤ āϏā§āĻŽāĻžāϝāĻŧāĨ¤
Q7. Which cells detect smells ? / āĻā§āύā§āϧ āĻā§āύ⧠āĻāĻŋāύāĻžāĻā§āϤ āĻā§°ā§ ?
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§āϝāĻžāĻā§āϝāĻž: āύāĻžāĻā§° āĻāĻŋāϤ⧰⧰ āĻŦāĻŋāĻļā§āώ āĻā§ā§°āĻžāĻšāĻ āĻā§āώ⧠āĻŦāĻŋāĻāĻŋāύā§āύ āĻā§āύā§āϧ āĻāĻŋāύāĻžāĻā§āϤ āĻā§°ā§āĨ¤
Q8. Which organ identifies smells ? / āĻā§āύā§āϧ āĻā§āύ āĻ āĻāĻāĻ āĻāĻŋāύāĻžāĻā§āϤ āĻā§°ā§ ?
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§āϝāĻžāĻā§āϝāĻž: āĻŽāĻāĻā§ā§ąā§ āύāĻžāĻā§° āĻĒā§°āĻž āĻ āĻšāĻž āϏāĻāĻā§āϤ āĻā§ā§°āĻšāĻŖ āĻā§°āĻŋ āĻā§āύā§āϧ āĻāĻŋāύāĻžāĻā§āϤ āĻā§°ā§āĨ¤
Q9. Which body part helps us learn clear speech ? / āϏā§āĻĒāώā§āĻāĻā§ āĻāĻĨāĻž āĻ'āĻŦ āĻļāĻŋāĻāĻžāϤ āĻā§āύ āĻ āĻāĻāĻ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§ ?
Options: (a) Ears (b) Eyes (c) Teeth (d) Hands
Ans: (a) Ears
Explanation: Hearing helps us learn correct pronunciation and speaking style. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻļā§āύāĻžā§° āĻā§°āĻŋāϝāĻŧāϤ⧠āĻāĻŽāĻŋ āĻļā§āĻĻā§āϧ āĻāĻā§āĻāĻžā§°āĻŖ āĻā§°ā§ āĻāĻĨāĻž āĻā§ā§ąāĻžā§° āϧ⧰āĻŖ āĻļāĻŋāĻā§āĻāĨ¤
Q10. Voice is produced in the ______. / āĻŽāĻžāϤ ______ āϤ āϏā§āώā§āĻāĻŋ 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§āϝāĻžāĻā§āϝāĻž: āϏā§āĻŦā§°āϝāύā§āϤā§ā§°āϤ āĻĨāĻāĻž āϏā§āĻŦā§°āϤāύā§āϤā§ā§°ā§āϝāĻŧā§ āĻļāĻŦā§āĻĻ āĻā§āĻĒāύā§āύ āĻā§°ā§āĨ¤
Q11. What vibrates to produce sound ? / āĻļāĻŦā§āĻĻ āĻā§āĻĒāύā§āύ āĻā§°āĻŋāĻŦāϞ⧠āĻāĻŋ āĻāĻŽā§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§āϝāĻžāĻā§āϝāĻž: āϏā§āĻŦā§°āϤāύā§āϤā§ā§°ā§ā§° āĻŽāĻžāĻā§ā§°ā§ āĻŦāĻžāϝāĻŧā§ āĻĒāĻžā§° āĻš'āϞ⧠āϏāĻŋāĻšāĻāϤ āĻāĻŽā§āĻĒāĻŋāϤ āĻšāϝāĻŧ āĻā§°ā§ āĻļāĻŦā§āĻĻ āϏā§āώā§āĻāĻŋ āĻā§°ā§āĨ¤
Q12. Why is the thumb important ? / āĻŦā§āĻĸāĻŧāĻž āĻāĻā§āϞāĻŋ āĻāĻŋāϝāĻŧ āĻā§ā§°ā§āϤā§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§āϝāĻžāĻā§āϝāĻž: āĻŦā§āĻĸāĻŧāĻž āĻāĻā§āϞāĻŋāϝāĻŧā§ āĻŦāϏā§āϤ⧠āĻĻā§āĻĸāĻŧāĻāĻžā§ąā§ āϧ⧰āĻŋāĻŦāϞ⧠āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤
Q13. The thumb can touch ______. / āĻŦā§āĻĸāĻŧāĻž āĻāĻā§āϞāĻŋāϝāĻŧā§ ______ āϏā§āĻĒā§°ā§āĻļ āĻā§°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§āϝāĻžāĻā§āϝāĻž: āĻāĻ āĻŦāĻŋāĻļā§āώ āĻā§āώāĻŽāϤāĻžāĻ āĻŽāĻžāύā§āĻšāĻ āĻŽāĻāĻŦā§āϤ āϧ⧰āĻž āĻļāĻā§āϤāĻŋ āĻĻāĻŋāϝāĻŧā§āĨ¤
Q14. What does the skin produce in sunlight ? / āϏā§ā§°ā§āϝ⧰ āĻĒā§āĻšā§°āϤ āĻāĻžāϞ⧠āĻāĻŋ āĻā§āĻĒāύā§āύ āĻā§°ā§ ?
Options: (a) Calcium (b) Melanin (c) Keratin (d) Insulin
Ans: (b) Melanin
Explanation: Melanin protects the skin from harmful UV rays. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽā§āϞāĻžāύāĻŋāύ⧠āĻā§āώāϤāĻŋāĻāĻžā§°āĻ UV ā§°āĻļā§āĻŽāĻŋā§° āĻĒā§°āĻž āĻāĻžāϞāĻ āϏā§ā§°āĻā§āώāĻž āĻĻāĻŋāϝāĻŧā§āĨ¤
Q15. Melanin protects us from ______ rays. / āĻŽā§āϞāĻžāύāĻŋāύ⧠āĻāĻŽāĻžāĻ ______ ā§°āĻļā§āĻŽāĻŋā§° āĻĒā§°āĻž ā§°āĻā§āώāĻž āĻā§°ā§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§āϝāĻžāĻā§āϝāĻž: āϏā§ā§°ā§āϝ⧰ UV ā§°āĻļā§āĻŽāĻŋāϝāĻŧā§ āĻāĻžāϞ⧰ āĻā§āώāϤāĻŋ āĻā§°āĻŋāĻŦ āĻĒāĻžā§°ā§, āĻŽā§āϞāĻžāύāĻŋāύ⧠āĻāϝāĻŧāĻžā§° āĻĒā§°āĻž ā§°āĻā§āώāĻž āĻā§°ā§āĨ¤
Q16. Why do lips crack in winter ? / āĻļā§āϤāĻāĻžāϞāϤ āĻāĻāĻ āĻāĻŋāϝāĻŧ āĻĢāĻžāĻā§ ?
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§āϝāĻžāĻā§āϝāĻž: āĻ āĻžāĻŖā§āĻĄāĻž āĻļā§āĻāĻžāύ āĻŦāĻžāϝāĻŧā§ā§ąā§ āĻāĻāĻ ā§° āĻā§°ā§āĻĻā§ā§°āϤāĻž āĻāĻŽāĻžāĻ āĻĻāĻŋāϝāĻŧā§āĨ¤
Q17. Lips dry quickly because they do not have ______. / āĻāĻāĻ āϤ ______ āύāĻžāĻĨāĻžāĻā§ āĻŦāĻžāĻŦā§ āϏā§āύāĻāĻžāϞ⧠āĻļā§āĻāĻžāϝāĻŧāĨ¤
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§āϝāĻžāĻā§āϝāĻž: āĻāĻāĻ āϤ āϤā§āϞ āĻā§āĻĒāύā§āύ āĻā§°āĻž āĻā§ā§°āύā§āĻĨāĻŋ āύāĻžāĻĨāĻžāĻā§, āϏā§āϝāĻŧā§āĻšā§ āϏā§āύāĻāĻžāϞ⧠āĻļā§āĻāĻžāϝāĻŧāĨ¤
Q18. Why are cotton clothes comfortable in summer ? / āĻā§°āĻŽāĻāĻžāϞāϤ āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§° āĻāĻŋāϝāĻŧ āĻā§°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§āϝāĻžāĻā§āϝāĻž: āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§°ā§ āĻāĻžāĻŽ āĻļā§āώāĻŖ āĻā§°āĻŋ āĻļā§°ā§ā§° āĻļā§āĻāĻžāύ ā§°āĻžāĻā§āĨ¤
Q19. Cotton helps cool the body because sweat ______. / āĻāĻĒāĻžāĻšā§ āĻāĻžāĻĒā§ā§°ā§ āĻļā§°ā§ā§° āĻ āĻžāĻŖā§āĻĄāĻž ā§°āĻžāĻā§ āĻāĻžā§°āĻŖ āĻāĻžāĻŽ ______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§āϝāĻžāĻā§āϝāĻž: āĻāĻžāĻŽ āϏā§āύāĻāĻžāϞ⧠āĻŦāĻžāώā§āĻĒā§āĻā§āϤ āĻš'āϞ⧠āĻļā§°ā§ā§°ā§° āϤāĻžāĻĒ āĻāĻŽā§āĨ¤
Q20. Which of the following is correct ? / āϤāϞ⧰ āĻā§āύāĻā§ āĻļā§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