Hamara Saur Mandal
Class 6 Science · Chapter 12: Dharti ke Paar · NCERT Curiosity section 12.3
Seekho
Suraj ka ek parivaar hai: aath grah uske chaaron or kaksha (orbit) mein ghoomte hain. Suraj se kram mein: Budh, Shukra, Prithvi, Mangal, Brihaspati, Shani, Arun, Varun. Chaand, asteroids aur dhoomketu ke saath ye saur mandal hai.
Andar ke chaar grah chhote aur chattaani hain. Baahar ke chaar vishaal grah zyaadatar gas aur barf ke bane; Brihaspati sabse bada aur Shani ke sundar valay (rings) hain. Grah apni roshni nahi banaate: wo Suraj ki roshni pariwartit karke chamakte hain.
Chaand (prakritik upgrah) grah ke chakkar lagata hai. Prithvi ka ek Chaand hai. Mangal aur Brihaspati ke beech chattaani asteroids ki patti hai; barfeele dhoomketu Suraj ke paas aane par lambi chamakti poonchh banaate hain. 2023 mein Bhaarat ka Chandrayaan-3 Chaand ke dakshini dhruv ke paas utra.
Explore: grah kram mein lagao.
- Aathon grah Suraj se kram mein lagao.
Yaad rakho
- Aath grah Suraj ki parikrama karte hain: Budh, Shukra, Prithvi, Mangal, Brihaspati, Shani, Arun, Varun.
- Andar ke grah chattaani, baahar ke vishaal; grah Suraj ki pariwartit roshni se chamakte hain.
Quick check
Sabse bada grah kaunsa hai?
- Brihaspati
- Prithvi
- Mangal
- Shukra
Answer
Brihaspati. Brihaspati hamare saur mandal ka sabse bada grah hai.
Socho
Shukra aksar sooraj dhalne ke baad ya ugne se pehle tez chamakta dikhta hai. Kya ye taara hai? Kaise pata?
Ek answer
Nahi, ye grah hai. Ye Suraj ki roshni pariwartit karke chamakta hai, taaron ki tarah aam taur par timtimaata nahi, aur hafton mein taaron ke beech apni jagah badalta 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.