Which of the following statements best describes the general pattern of composition among the four jovian planets?
Jupiter and Saturn are made mostly of hydrogen and helium, while Uranus and Neptune are primarily made of hydrogen compounds such as water (H2O), methane (CH4), and ammonia (NH3)
Look at the densities of the jovian planets. What is the trend?
There is no obvious trend in the densities of the jovian planets.
Which of the following statements best explains why the densities of Uranus and Neptune are higher than those of Jupiter and Saturn?
They have a higher proportion of hydrogen compounds and rock.
Which of the following best explains why Jupiter’s density is higher than Saturn's?
Jupiter is more massive than Saturn.
Based on the leading scientific theory of solar system formation, which of the following statements best explains why Uranus and Neptune have a significantly different composition and higher density than Jupiter and Saturn?
Jupiter and Saturn captured more gas from the solar nebula than Uranus and Neptune.
What jovian planets are composed mostly of hydrogen and helium?