What makes a planet a terrestrial?

a. primarily composed of rock and metal
b. its gassy
c. has lots of moons

which of the following characteristics do all outer planets have in common?

a. they are mostly made up of hydrogen and helium.
b. they have liquid cores
c. they are small and dense.

which planet has a tilted axis of rotation similar to that of earth, which means it has seasons?

a. mars
b. jupiter
c. uranus