Chapter 1: Dharti par Jagah Dhoondhna
Hum apni vishaal gol Dharti par koi bhi jagah kaise dhoondhein, aur kahin dopahar aur kahin raat kyun? Is chapter mein hum map padhenge, akshansh aur deshantar ka jaal use karenge, aur seekhenge ki poorv ya paschim jaane par samay kaise badalta hai.
Is chapter mein tum
- map ke teen ghatak padhna
- akshansh aur deshantar se jagah dhoondhna
- deshantar se sthaaniya samay nikaalna
- Bhaarateeya Maanak Samay samjhaana
Topics
- Map aur Uske Ghatak NCERT 1.1
Map jagah ka chapti satah par chitra hai; globe Dharti ka gol model hai.
- Akshansh aur Deshantar NCERT 1.2
Akshansh Bhoomadhya rekha se uttar aur dakshin naape gaye samaanaantar vritt hain (0° se 90°).
- Sthaaniya Samay aur Maanak Samay NCERT 1.3
Dharti har ghante 15° ghoomti hai: poorv mein samay aage, paschim mein peeche.
Key words
- Map
- jagah ka chapti satah par chitra
- Scale
- map ki doori ka asli doori se rishta
- Equator
- Dharti ke beech ki 0° akshansh rekha
- Latitude
- jagah Bhoomadhya rekha se kitni uttar ya dakshin hai
- Longitude
- jagah Prime Meridian se kitni poorv ya paschim hai
- Standard time
- poore desh ya zone ka ek samay
Summary
- Map scale, disha aur prateek se jagah ko upar se dikhaata hai.
- Akshansh aur deshantar jaal banaate hain; do numbers kisi bhi jagah ki theek sthiti dete hain.
- Dharti ghante mein 15° ghoomti hai, isliye poorv mein samay aage aur paschim mein peeche.
- Bhaarat ek Bhaarateeya Maanak Samay maanta hai, 82.5°E par aadhaarit, Greenwich se 5 ghante 30 minute aage.