Question

1. the process of small objects forming larger objects in the early solar system is called a. accretion b. enlargement c. accumulation d. agglomeration e. amassment 14. strong evidence that aliens have visited earth is/are a. documented abductions of people by aliens b. crashed alien spacecraft c. movies that show aliens d. secret government reports that were recently released e. none of the above 15. the last part of a terrestrial planet that formed was its a. tectonic plates b. atmosphere c. volcanos d. magnetic field 16. jupiter, saturn, uranus and neptune a. are members of the kuiper belt b. are all mostly helium c. are the outermost planets of the solar system d. are older than the terrestrial planets 17. the terrestrial planets a. protect each other from going into orbital resonance with jupiter b. all have at least one moon c. all have an atmosphere d. all have a magnetic field e. all have liquid or frozen water on their surfaces

Explanation:

1. In the early Solar - System, the process of small objects combining to form larger ones is known as accretion. It is a fundamental concept in planetary formation.
2. There is currently no scientific evidence for the claims of alien abductions, crashed alien spacecraft, or secret government - released reports as proof of alien visits. Movies are fictional.
3. The atmosphere of a terrestrial planet is thought to be the last part to form as it can be influenced by outgassing, impacts, and other processes after the planet's solid structure has formed.
4. Jupiter, Saturn, Uranus, and Neptune are the outermost planets of the Solar System (beyond the asteroid belt). They are gas giants and not part of the Kuiper Belt, and they are not mostly helium (Jupiter and Saturn are mostly hydrogen and helium, Uranus and Neptune have more ice - rich compositions).
5. Among the terrestrial planets (Mercury, Venus, Earth, Mars), not all have a moon (Mercury and Venus don't), not all have a strong magnetic field (Venus doesn't have a global magnetic field), and not all have liquid or frozen water on their surfaces (Mercury and Venus don't). However, they all have an atmosphere to some extent.

Answer:

1. A. accretion
2. E. none of the above
3. B. atmosphere
4. C. are the outermost planets of the Solar System
5. C. all have an atmosphere