GED Science TestEarth and Space ScienceEasy
A space probe is designed to study the composition of a newly discovered planet. The planet is observed to be large, with a low density, and composed primarily of hydrogen and helium. It also has a strong magnetic field and a complex ring system. Based on these characteristics, how would this planet be classified?
- AIrregular moon
- BGas giant
- CDwarf planet
- DTerrestrial planet
Show answer & explanationAnswer & explanation
Correct answer: B. Gas giant
Gas giants are characterized by their large size, low density (compared to terrestrial planets), gaseous composition (mostly hydrogen and helium), strong magnetic fields, and often extensive ring systems.
Why the other options are wrong
- A. Irregular moons are typically small, rocky or icy, and orbit larger planets, not standalone planets with ring systems.
- C. Dwarf planets are smaller, typically rocky or icy, and do not fit the description of a large, low-density gas body.
- D. Terrestrial planets are smaller, denser, rocky, and lack extensive gas envelopes or prominent rings.
Gas Giant
A large planet composed primarily of hydrogen and helium, with a relatively low density, a thick atmosphere, and often a prominent ring system and numerous moons.
- Large size, low average density.
- Composed mainly of hydrogen and helium.
- Strong magnetic field, complex ring systems.
Memory trick: Planets have distinct traits for their type.