Ancient greek civilization was located on one contiguous body of land, north of the aegean sea.
a. true
b. false

This is false!

An important part of the Greek civilization was the island of Crete, which is not contiguous with the rest of the Peloponnese. Additionally there were other important sites of the Greek culture on other Islands in the Aegean Sea and in Turkey - we still find their ruins and remains today.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.