What we have learned this week 1/14/2011

This week we learned about the Earths Crust and Caves from the Bill Nye videos. From the earths crust video I learned that the Earth has a core a mantle and a outer core and then the crust where we stand. The core has iron in it(this is what we predict)and then comes the outer core which is made of mixed metals and lastly comes the Mantle a hot and gooey layer. The crust is where we put our houses and where we stand. In the caves video I learned that caves can be under water, ground and even under ice! I also learned that the weather in caves never change which is what i found interesting because what if global warming happens the ice caves should melt. Stalagmite it the hardend minerals that starts to grow up to the ceiling and stalactite it the one that holds tight on to the ceiling. The animals that live in caves are Trogloxenes- cave visitors, Troglyphiles-cave lovers,  Troglodytes- cave dwellers. I learn't that limestone has calcium.