Answer: 75 grams If you had a 5-gram sample of Lawrencium, how much would still remain after 30 minutes?
Answer: none If you had a 100-gram sample of Einsteinium, how much would remain after 40 days?
Who's on First, University of California, Berkeley. This website is a book chapter about geologic time. This online version of their informative booklet contains short, content explanations about relative time, major geologic time divisions, index fossils for use in age dating, radiometric dating and the age of the earth.
This 5-12-grade activity introduces students to the idea of sequencing information in overlapping data sets and the Principle of Superposition, which is a core concept in relative dating. Offers history of age dating, stratigraphic principles, rock correlation, fossil correlations, radiometric dating, and the geologic time scale. Short discussion of radioactive dating and stratigraphic principles.
What is the total amount of time represented by the cuts?