Frederick Vine contribution to plate tectonics

It became known as the Vine-Matthews-Morley hypothesis, recognising the work of Canadian geologist Lawrence Morley who had independently come up with the same idea. It became the first scientific test of sea floor spreading, and a crucial development in the theory of Plate Tectonics.

Explanation:

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.