Mammals are some of the newest organisms to appear on Earth. Young scholars complete an activity that results in a timeline showing the appearance of different types of living organisms. Provided with a list that spans from prokaryotes...

A good introduction to different types of fossils and how they form. There are also directions for making three different models of fossils.

[Free Registration/Login Required] Students read different fossils, how fossils are made, and three different types of rock on Earth. A question sheet is available to help students build skills in comparing and contrasting.