Hum Kaise Naapte Hain?

Class 6 Science · Chapter 5: Lambai ka Maap aur Gati · NCERT Curiosity section 5.1

Seekho

Gauri aur uska chhota bhai ek hi mez ko baalisht se naapte hain. Gauri ko 8 baalisht milte hain; bhai ko 11! Kaun sahi hai? Dono ne sahi gina, par unke haath alag size ke hain.

Naapna matlab kisi anjaan maatra ki tulna ek jaani-pehchaani nishchit maatra se karna, jise unit kehte hain. Maap ke do hisse hote hain: number aur unit. "8 baalisht": 8 number hai, baalisht unit.

measurement = number + unit

Log lambe samay se shareer ke angon ko unit ki tarah use karte aaye hain: baalisht, haath (kohni se ungli ke sire tak), kadam, ungli ki chaudai (purane Bhaarat mein angula). Ye aasaan hain, par har insaan mein alag hote hain, isliye nateeje mel nahi khaate.

Praacheen Harappa ke shehron mein bhi log nirmaan ke liye nishaan wale scale use karte the, kyunki vyapaariyon aur kaarigaron ko aisi lambai chahiye thi jis par sab sahmat hon. Hamein standard units chahiye: har jagah, sabke liye ek jaisi.

Explore: haath ki jagah ruler se naapo.

1. Pencil ke har sire ke nishaan par tap karo.

Yaad rakho

• Naapna kisi maatra ki unit se tulna hai; maap = number + unit.
• Shareer ke ang wali units alag hoti hain, isliye standard units chahiye.

Quick check

Ek hi mez ke liye do bachchon ko alag baalisht kyun milte hain?

1. Unke haath alag size ke hain
2. Mez ka size badalta hai
3. Ek ko ginti nahi aati
4. Baalisht standard unit hai

Socho

Apne baalisht se kaksha ka darwaza naapo aur dost se bhi kaho. Dono dhyaan se ginein tab bhi jawaab alag kyun ho sakte hain?

Practice

Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.