Quarter 3

I learned about Earth's changing surface ( A Trip Through Geologic Time ) . I learned about the Relative age, Absolute age, fossils, half-life, elements,Geologic Time Scale, and  the history of Earth ( the periods and eras ) . Our Planet was from 4.6 Billion years ago,many organisms was live on the Earth. Likes Trilobites, Dinosaurs, ... But those organisms was became fossil. There are many kinds of fossil, likes Molds and Casts, Trace fossils, Carbon films, Amber, ... We are still in Quaternary Period.