Locating Places on the Earth

Sonu says on a map "up" always means "ahead", the way we are walking. His sister says up means something else. Who is right?

At 12 noon, Kabir video-calls his cousin, who lives far away in another country. It is dark there. Kabir says his cousin's clock must be broken — how can it be dark at noon? Who is right?

On the map Greenland looks bigger than India. Aarav says so Greenland is a bigger country than India. Can map size alone tell us this for sure?

Simran thinks the equator is a real line drawn on the ground, one you could see from a plane or by standing on it. Her teacher says it is not. Who is right?

Aadi says longitude is counted starting from Greenwich because that is the Earth's "real middle". His sister says that spot was chosen by people — it is not a natural middle. Who is right?

Looking at a map, Ved says city X is closer to the equator than city Y, so X must be hotter than Y. His sister says this is not always true. Who is right?