Activity for Greenstack‭

Type	On...	Excerpt	Status	Date
Question	—	A planet made of iron Our planet has a surface full of silicates and a core made of iron. It's due to this that Earth is the way it mostly is - most rocks and many minerals contain some form of silica. But what about a planet with an iron surface and a core of, let's say, mercury (to have an element denser than iron)? Thi... (more)	—	about 9 years ago