Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Physics Heat and Transfer
Near the earth's surface _____ air rises up whereas _____ air comes down:
1
Cold, cold
2
Hot, hot
3
Hot, cold
4
More than one of the above
5
None of the above