From its discovery in 1930 up until 2006, Pluto was considered the 9th planet in the solar system. After the International Astronomical Union revised and solidified the definition of a planet, poor Pluto was demoted to "dwarf planet."
Do you think Pluto should still be designated a planet, or not? Consider the other bodies in the solar system that might merit similar classification, and defend your position. .about 3 sentences
The outer planets are sometime collectively called the "gas giants." That name is perhaps a bit misleading, given how we think of gas in earth-based situations. However, the most abundant gas in the solar nebula - hydrogen - is certainly the primary ingredient of all four Jovian planets.
In a 2-3 paragraph essay, outline some of the major differences among the Jovian planets. Describe the process of gas capture that helped to build them, and use it as a basis to explain these differences.