Homework Help: science

Posted by emily on Thursday, April 9, 2009 at 8:42am.

ok i have a couple questions.
1. How has life changed throughout Earth's history?
2.What are three things that fossils tell us about earth's past?
3.What is radioactive dating? how do scientists use parent and daughter elements to determine the age of a fossil?
4.What is relative time/age? What are examples of relative time?
5.How do fossils form? Where are fossils generally found?
6.How is Earth today different (2 details) than Earth during the Precambrian Era?
7.What is and index fossil? How does an index fossil relate to the law of superposition?

Thank you for your help!!

science - Writeacher, Thursday, April 9, 2009 at 8:47am
Please note that we don't do students' homework for them. Be sure to go back into your textbook or use a good search engine. http://hanlib.sou.edu/searchtools/

Once YOU have come up with attempted answers to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to comment on your thinking.
science - emily, Thursday, April 9, 2009 at 8:49am
I can't find them and it's not homework.
science - emily, Thursday, April 9, 2009 at 8:51am
Can you please help me!!!
science - Writeacher, Thursday, April 9, 2009 at 9:10am
1. Go to http://www.google.com

2. Enter these search terms, one set at a time; then read the search results until you find your answers.

How has life changed throughout Earth's history

three things that fossils tell us about earth's past

radioactive dating

parent and daughter elements to determine the age of a fossil

etc.
science - emily, Thursday, April 9, 2009 at 9:12am
ok thank you!!!

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