1. Explain how you determined the age of the intruding rock on table C. 2. What information does the mass spectrometer provide?

3. In table E, how did you determine the identity of the unknown fossil?

"central america is subject to fierce which drop large amounts of on the region. another threat in the region is activity such as earthquakes and volcanoes caused by the shifting of the earth's large waves called may result in mass destruction. frequently crops are wiped out causing in the region." where is the question

Most topographic maps, the index contour lines are generally darker and are marked with their elevations. 

Environmental factors