Hard body parts such as teeth ,bones,shells,seeds,pollen grain,and wooden stemof plants are often preserved as fossils . Also earth has more than millions of years existing it has their eras and periods in each one.
martes, 26 de octubre de 2010
Geologic Time
You know what is fossil. It is a remain or imprint of a living thing preserved in Earth Crust.
Hard body parts such as teeth ,bones,shells,seeds,pollen grain,and wooden stemof plants are often preserved as fossils . Also earth has more than millions of years existing it has their eras and periods in each one.
Hard body parts such as teeth ,bones,shells,seeds,pollen grain,and wooden stemof plants are often preserved as fossils . Also earth has more than millions of years existing it has their eras and periods in each one.
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