Haath se Chunna, Gahaai aur Osaai

Class 6 Science · Chapter 9: Rozmarra mein Alag Karne ke Tareeke · NCERT Curiosity section Ch 9

Seekho

Anjali daadi ki madad karti hai chaawal saaf karne mein. Wo thaali mein failaakar chhote kankad aur bhoosi haath se chunti hain. Ye handpicking hai: tab kaam ka jab bekaar tukde bade ya alag dikhte hon, aur bahut zyada na hon.

Mishran mein do ya zyada cheezein mili hoti hain. Mishran alag karte hain bekaar ya haanikaarak hisse hataane (chaawal se kankad) ya kaam ka hissa paane (dahi se makkhan, samudra se namak) ke liye.

Khet mein kisaan paki fasal kaatte hain, phir gahaai karte hain: dandon ko peet-te hain (ya bail ya machine se) taaki daane dheele hon. Phir osaai: hawa mein oonchaai se mishran giraate hain, aksar soop se. Halki bhoosi ud jaati hai aur bhaari daana dher mein girta hai.

Explore: khet se thaali tak.

1. Saaf daana paane ke steps kram mein lagao.

Yaad rakho

• Handpicking kuch bade ya alag dikhne wale tukde hataata hai.
• Gahaai daanon ko dandon se alag karti hai; osaai hawa se bhoosi ko daane se alag karti hai.

Quick check

Kaunsa tareeka hawa se halki bhoosi ko bhaari daane se alag karta hai?

1. Osaai (winnowing)
2. Gahaai
3. Handpicking
4. Filtration

Socho

Bilkul hawa na ho to osaai achhi kyun nahi chalegi? Kisaan kya kar sakta hai?

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.