Chapter 7: Prakriti mein Garmi ka Sthaanaantaran
Steel ki karchhi garam kyun hoti, dhuaan kyun uthta, samudra se hawa kyun chalti, aur Sooraj khaali antariksh paar karke hamein garam kaise karta? Is chapter mein chaalan, sanvahan aur vikiran samjhenge, dekhenge ye kapde, ghar aur tat ki hawaayein kaise gadhte, Sooraj se chalta jal chakra dekhenge, aur jaanenge paani zameen mein riskar bhoojal kaise banta.
Is chapter mein tum
- chaalan, sanvahan aur vikiran samjhaana
- padaarthon ko garmi ke achchhe ya kharaab chaalak mein baantna
- zameeni aur samudri hawa samjhaana
- jal chakra, antahsravan aur bhoojal batana
Topics
- Garmi ka Chaalan NCERT 7.1
Chaalan: thos mein garmi kan se kan, garam se thande, kan bina hile.
- Sanvahan aur Hawaayein NCERT 7.2
Sanvahan: drav aur gas mein kanon ki asli chaal se garmi; garam upar, thanda neeche.
- Vikiran NCERT 7.3
Vikiran bina maadhyam garmi le jaata; Sooraj ki garmi aise aati.
- Jal Chakra aur Bhoojal NCERT 7.4
Sooraj jal chakra chalaata: vaashpan aur vaashpotsarjan, sanghanan, varsha, aur waapsi.
Key words
- Conduction
- thos mein kan se kan garmi
- Convection
- drav ya gas ke chalte kanon se garmi
- Radiation
- bina maadhyam garmi
- Insulator
- garmi ka kharaab chaalak
- Sea breeze / land breeze
- din mein samudra se zameen; raat mein zameen se samudra thandi hawa
- Infiltration
- zameen mein paani risna
- Aquifer
- paani rakhne wali zameen ki parat
Summary
- Garmi chaalan (thos), sanvahan (drav-gas) aur vikiran (bina maadhyam) se chalti.
- Dhaatuein garmi achchhi chalaati; fasi hawa, oon, lakdi aur mitti rokte.
- Zameen paani se jaldi garam-thandi, samudri aur zameeni hawa.
- Sooraj jal chakra chalaata; antahsravan aquifer bharta, jinhe hamein recharge karna chahiye.