original: the core may be composed of solid and liquid layers , while the cores of mars and venus are thought to be completely solid as they lack an internally generated magnetic field .
simplifications: the core may be made up of solid and liquid layers , while the cores of mars and venus are thought to be entirely solid as they do not han an internally made magnetic field . the cores of mars and venus are thought to be completely solid while the composed of solid and liquid layers . the core might be made of solid and liquid layers . mars and venus have solid cores . the core may be composed of solid and liquid layers , while the cores of mars and venus are thought to be completely solid as they dont have an internally generated magnetic field . the core may be composed of solid and liquid layers , while the cores of mars and venus are thought to be completely solid as they do n't create a magnetic field inside . the tough central part may be formed of solid and liquid layers , while the tough central parts of mars and venus are guessed to be completely solid as they lack an internally produced magnetic field . though the cores of mars and venus may be composed of solid and liquid layers , they are thought to be completely solid because they lack an internally generated magnetic field . the core may be made of solid and liquid layers , while the cores of mars and venus are thought to be completely solid as they lack an internally generated magnetic field .