Which planets have rocky and iron cores surrounded by a thick layer of frozen hydrogen, a deep layer of liquid hydrogen, and then an atmosphere above with a banded appearance from a mixture of sulfur and organic compounds in ammonia clouds?

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

What does 2[tex] {2}^{ - 4} \times {2}^{ - 2} [/tex]

How does central place theory explain patterns in the size and distribution of cities?