'Scale day' presentation slideshows

Geologic time scale day 2

Geologic time scale day 2. 5-21-14. 5-21-14 Bell Work:. How do scientists keep track of time? How do you keep track of time?. Daily Review:. Why do you think it is important for scientists to keep track of time?. Get out your study guide. Study Guide (1-16). 1. Sexual reproduction.

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