Crust and Mantle....Crust and Mantle

Today we discussed how we can come to a better understanding of our planet. One way is to simply look at the earth from afar. We can see three main parts of the earth, the actual land, oceans, and air that makes up the atmosphere. But what about what is lying under the surface? How can we discover what is there? Get out a shovel and dig? That would be pretty difficult to achieve.  A better way would be to simply look for clues about what might be underneath.  If we look closely at the Ring of Fire around the pacific we will notice lots of volcanoes and earthquakes which provide us with clues about the inside of earth.  According to the clues the inside must be hot and it must have parts that move.  In fact there are 4 layers of the earth, three of which most of us will never see.  The layer on which we live is called the crust.  Underneath that is the mantle which is a thick hot rocky layer.  The core is made of two parts a solid metal center and a liquid outer core.  Check out Mr. Lee's song to help you learn the layers of the earth.