Why are Ganymede and Callisto geologically dead, whereas the other two Galilean moons of Jupiter are active

these include the fossil fuels, oil, natural gas, and coal and nuclear energy. hope this ! ^.^

-ella

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.

b. antarctica

explanation:

about 90% of the world's ice can be found on antarctica.