|MadSci Network: Earth Sciences|
Mr. Ross, Interesting question. Think of the Earth as a ball, because that's exactly what it is, just that it's real big. Imagine yourself standing on a ball, and someone else was standing on the same ball on the opposite side. To be able to go straight to that person, going through the ball, you would have to go down. If you went south, north, east or west, (like on a compass) you would be going around the outside of the ball. So that wouldn't work. Think about standing straight and tall and turning yourself into a giant screw. Your feet would be the point and your head would be the head of the screw. The direction you would be pointing in is the direction you want to go to reach the center of the ball. And it would not matter where on the ball you would be standing. You would always have to go down. But I don't know if you would want to go there. If you have ever seen a volcano and the lava that come out you know it is very hot. Experiment: Make a ball out of yarn or aluminum or playdough. Get a thin stick long enough to go through the ball Stick the stick through the ball in several places, through the middle See in which direction you had to put the stick in each time. What happened!
Try the links in the MadSci Library for more information on Earth Sciences.
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