What Kind of Planets Are Jupiter, Saturn, Uranus & Neptune?

I'm Christopher Snead, a graduate student at UCLA's department of earth and space sciences. And today I'm going to be discussing how Jupiter, Saturn, Uranus and Neptune are different from the inner planets of the solar system. Jupiter, Saturn, Uranus and Neptune are gas giants which means that they don't have a well defined solid surface like the earth and Mars do. These planets formed far enough away from the solar system from the sun that ice could exist in solid form. So when they were excreting rock they could also excrete ice and form large enough to pull gas directly from the solar nebula. This allowed them to become these massive gas giants. I'm Christopher Snead, a graduate student from UCLA's department of earth and space sciences. Thanks for watching.