Question 1
The large outer planets (Jupiter, Saturn, Uranus, and Neptune contain huge amounts of ________ and other light materials as part of their composition.
◦ hydrogen
◦ argon
◦ nitrogen
◦ oxygen
Question 2
Due to differentiation, the lighter, gaseous materials escaped Earth's interior and became what is called the ________ atmosphere.
◦ modern
◦ transitional
◦ formative
◦ primitive