Wednesday, September 22, 2010
fossils
This fossil is the original remains. It is unchanged remains. In rare cases animals are preserved in its entirety.
This fossil is a trace fossil. This fossil is an impression left in the rock left by an animal.
Friday, September 17, 2010
science

this is the order 3, 2, 1 ,6 , 4, 5 from youngest to oldest. 3 would be the youngest because it cut through 2 layers of rock and its an intrusion so the principle of cross makes it young. 2 is also an intrusion but it only goes through 1 layer of rock but principle of cross makes it one of the youngest. 1 is the top layer so the principle of superposition makes it one of the younger ones. 6 is on the second layer of rock not including the intrusions so the principle of superposition makes it the 4th oldest. number 4 is the second to last rock closest to the bottom so the principle of superposition makes it one of the oldest rock layers. The oldest layer is 5 because it is at the very bottom so principle of superposition makes it the oldest.
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