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CHAPTER 5 - INTERPRETING EARTH'S HISTORY PAGES 115 - 140
66. What is a good choice of radioactive element for the dating of recent remains of living organisms?
67. Why is your answer in question 66 not appropriate if the age of the sample is more than 50,000 years?
68. What is a good choice of radioactive element for the dating of rocks on the Earth?
69.
According to Figure 5-15, what is the half-life of Potassium - 40 ?
70.
According to Figure 5-15, what does Carbon - 14 disintegrate into?
71.
According to Figure 5-15, what does Rubidium - 87 disintegrate ( decay ) into?
72. What general information does the Generalized Bedrock Geology of New York State found in the Earth Science
Reference Table tell us about our area?
Large scale maps, such as the New York Stae maps in the Earth Science Reference Tables give you general
information about rock types, the ages of the bedrock and the geologic history of your community.