Sky can fall on Earth:
Rig Veda II.17.5
Fast (Indra) upheld the earth that nourisheth all life, and stayed the heaven from falling by his wondrous skill.
Cooked articles causes rain:
Yajur Veda III.49
The oblation full of cooked articles put into the fire, goes up to the sky. And returns there from full of rain.”
Yajur Veda II.16
”We perform the yajna for Vasus, Rudras and Adityas…The desired oblation (Ahuti) reaches the space, comes in contact with air and the light of that sun. It thence brings down rain for us…”
Earth has ends:
Rig Veda X.58.3
Thy spirit, that went far away, away to the four-cornered earth, We cause to come to thee again that thou mayst live and sojourn here.
Earth is flat:
Rig Veda III.6.5
Great are the deeds of thee, the Great, O Agni: thou by thy power hast spread out earth and heaven.