It looks like the Earth, right? Wait, don't answer that. And no smart answers as to what it does look like... please... Okay, so not the most beautiful model ever, but stick with me on this one. It's a great model for younger students (4th grade, or so), who are beginning to learn about the layers of the Earth, as it emphasizes the most basic features. First, a quick review of the layers of the Earth: The core is very hot. And, it's under so much pressure that the inner core (this activity...