Two easy questions. 10 easy points. These questions are about astronomy.?

Question

Which solar system bodies have volcanoes?
Which solar system bodies have solid rocky sufaces and iron (metallic) cores?

I think for the second question the answer is the first four planets. If I am right please prove it and answer the other easy question about volcanoes. Thanks.

Answer 1

All of the terrestrial planets have at one time or another had volcanoes and it is also believed that the moon may once have been volcanically active. However Mercury, Mars and the moon have long gone cold (at least we believe so) inside and are no longer volcanically active.
The Jovian moon Io is volcanically active and it also has a rocky surface. If one supposes that any body that has had a period of liquefied mantle, then the heavier elements like Iron would settle into the core which means that all of the Terrestrial planets and many of the larger moons of Jupiter possibly even Titan and Triton may have iron cores.
As for Titan and Triton, geothermal activity has been seen on Triton in the form of geysers, but no recent evidence of volcanic (liquefied rock) activity. And since Titan is covered with clouds, no one can really say about it.
Venus is still hot enough inside to have some geothermal eruptions, but, again, due to the cloud cover, we have not detected any.

Answer 2

I think Io has active volcanoes. It is a moon of Jupiter. There are around 100 known moons in the solar system so it would be difficult to name all the solar system bodies that have sold, rocky surfaces and a metallic core, unless you just mean the planets in which case I believe you are 100% right. I can prove it through process of elimination. Jupiter, Saturn, Uranus, and Neptune are gaseous planet and do not have a solid, rocky surface. The first four planets are all that is left.

Answer 3

i'm no longer constructive if that is B or E, yet some human beings are putting forward A, and that i'm particular that is envisioned through relativity. The solar's floor is less than better extreme gravity than the earth and gravity is assumed to reason a distortion of spacetime that may supply the arrival of time going better slowly less than this kind of means. it truly is stated as gravitational pink shift. A clock on the floor of the solar might want to, truly, bypass better slowly than one on earth. Edit: i will get rid of E because gravitational waves are envisioned for binaries in relativity, yet gravity waves have not in any respect been detected. The absence of detection does no longer make this any a lot less of a prediction, inspite of the actuality that. So I vote for B.

Answer 4

Venus,Earth,Mars

Answer 5

http://en.wikipedia.org/wiki/Volcanos#Elsewhere_in_the_solar_system lists everything in the solar system where there are volcanos.

Answer 6

All except for the gas giants.

Answer 7

are soler system