Mitti, Chattaanein aur Khanij
Class 6 Science · Chapter 11: Prakriti ke Khazaane · NCERT Curiosity section 11.5
Seekho
Mitti saadhaaran dikhti hai, par banne mein bahut samay laga. Chattaanein garmi, thand, baarish aur hawa se dheere-dheere chhote tukdon, phir ret aur baareek kanon mein toot-ti hain. Sade paudhe aur jaanwar humus jodte hain, jo mitti ko upjaau banaata hai.
Paudhe mitti mein ugte hain, isliye lagbhag saara khaana is par nirbhar hai. Kenchue, keede aur chhote jeev mitti mein rehte aur use swasth rakhte hain. Kuch centimetre mitti banne mein saikdon saal lag sakte hain, par jaldi beh sakti hai.
Chattaanein nirmaan ke liye patthar deti hain, aur chattaanon mein chhupe khanij loha, taamba aur aluminium jaisi dhaatu, aur namak aur abhrak bhi dete hain. Inhe khanan (mining) se nikaalte hain. Ye laakhon saal mein bane aur jaldi nahi bharenge.
Explore: mitti kaise banti hai?
- Mitti banne ke steps kram mein lagao.
Yaad rakho
- Mitti chattaanon se saikdon saal mein banti hai; humus use upjaau banaata hai.
- Chattaanein aur khanij patthar, dhaatu aur namak dete hain; ye seemit hain.
Quick check
Mitti ko upjaau kya banaata hai?
- Sade paudhon-jaanwaron ka humus
- Plastic kachra
- Sirf badi chattaanein
- Namak
Answer
Sade paudhon-jaanwaron ka humus. Humus poshak tatva jodta aur paani rokta hai.
Socho
Kenchuon ko kisaan ka dost kyun kehte hain?
Ek answer
Wo surang banaate hain jisse mitti mein hawa aur paani jaata hai, aur unka mal poshak tatva jodta hai, jisse mitti bhurbhuri aur fasal ke liye upjaau hoti 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.