The variation of temperature with distance in the solar nebula. None of the above. The solar nebula was stratified rather than well mixed. Meteorites formed outside the solar system. None of the above.
Large bodies cool less rapidly than small bodies.
Large bodies never reach the high temperatures that small bodies do. Large bodies do not form a lithosphere. All of the above. Outside the solar system. The sun, Jupiter, and Saturn are composed mainly of hydrogen and helium.