The Radioactive Decay Rates worksheet is designed to help students understand how to read a Radioactive Decay Rate graph and to help students understand Half Lives. I use this worksheet after I have talked about absolute dating versus relative dating. I went to Google and printed a different graph for each group of students in my class. I placed the graph and the answers for that graph in a page protector. They had to answer the questions on the first half of the worksheet based on the graph at their table. When they were done they went to another table and answered the questions on the second half of the worksheet based on a different graph. When they were finished I told them to turn the graph over so they could see the answers. You can have them do this as a homework assignment as well. They can go online (Google) at home and do a search for 'radioactive decay rates graph' by themselves. Tell them to write down the URL address for each graph they use. This document includes 8 graphs with an answer sheet for each graph. This activity supports Grade Seven California State Science Standard 4D - Students know that evidence from geologic layers and radioactive dating indicates Earth is approximately 4.6 billion years old.