Most dense in U.S.: California. Least dense: The Dakotas.
Most dense Canada: Toronto, Montreal. Least dense: Northwest territories
Well europe, asia, north america, half of africa so pick any country of those you would be right. Examples of african (it hs 32) areas in the northern hemi: egypt, kenya, libya, morocco, and the sahara desert
(australia and the other islands are in the southern)
Yes, this is true:
Equator runs through the northern part of Lake Victoria (which is on the border between Kenya, Uganda and Tanzania). Specifically, it passes through some islands (the Ssese Islands, some of which are inhabited) on Lake Victoria that belong to Uganda.
The answer would most likely be Sea-floor spreading because sea-floor spreading mostly occurs at divergent boundaries.