3. which term describes the conversion always solid directly to a gas without passing through the liquid state? a.) evaporation b.) sublimation c.) condensation d.) deposition

the answer is b.) hydrogen bonds between bases.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.