Which of the following geologic evidence does not support continentaldrift? (21.2)(a) similarities in biological species and fossils found on distantcontinents (b) continuity of geologic structures such as mountain ranges(c) ancient glaciation in the Southern Hemisphere(d) similar types of rivers on every continent
Notes 11/7 Earth Interior 1. Still has internal heating (partially molten core) 2. Differentiated: rock and metal are separated It means, separating substances with different densities in liquid or gas (must be free to move around to differentiate) Earth must have been completely molten long ago since it has differentiated Early sources of heat 1. Impacts (gravitational energy heat) 2. Differentiation (from gravitational energy) Current sources of heat 1. Radioactivity (U238) How old is the earth To find the age of a rock we need to know: 1. Current co