What are two major differences in the composition of the inner and outer planets?
I don't know what they mean my comparing their compostions.
inner planets are rocky ... outer planets are gas giants
When comparing the composition of the inner and outer planets in our solar system, there are two major differences to consider:
1. Size and Density: Inner planets, also known as terrestrial planets, include Mercury, Venus, Earth, and Mars. These planets are relatively small in size and have higher densities. This means that they are predominantly composed of rocky materials, such as silicates and metals. On the other hand, outer planets, also called gas giants, include Jupiter, Saturn, Uranus, and Neptune. These planets are much larger and have lower densities compared to the inner planets. They are mainly composed of gases, primarily hydrogen and helium, with some rocky or icy cores.
2. Atmospheric Conditions: The inner planets have thin and mostly non-existent atmospheres compared to the outer planets. For instance, Earth has a significant atmosphere that supports life and protects the planet's surface from harmful radiation. Mars and Venus have atmospheres, but they are thin, composed mainly of carbon dioxide, and contain no oxygen. In contrast, outer planets have thick and extensive atmospheres composed mostly of hydrogen and helium, with trace amounts of other gases. The gas giants have dynamic atmospheres with storm systems, like Jupiter's Great Red Spot and Saturn's rings, while Uranus and Neptune have distinctive icy atmospheres.
To compare the composition of the inner and outer planets, you can study their physical characteristics, such as size, density, and atmospheric properties. This information is obtained through astronomical observations, remote sensing techniques, and analysis of data collected from space probes and missions that have visited these planets.