1. What makes it so difficult for geologists to determine the age of the earth? How did they first determine its age?
2. How do meteorites tell us the age of earth? What do we look for inside them and what problems could arise?
3. Geochemist Clair Patterson’s research lead to the creation of the ultra clean room to prevent lead contamination. Why was lead a problem for his research? Where did it come from?
4. If lead is so poisonous, why did Romans use it during their time? What modern products use lead today? Is TEL in gasoline different from lead?
5. How does lead become similar with global warming? Emphasis on this answer.
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