Students visualize the Earth's ecosystem at a specific time period and how Earth has changed over time. They create a detailed journal entry for a specific time period and create a birthday card to Earth.

Students examine fossils and analyzing their significance in relation to theories of evolution. Hand-outs are provided. This lesson could be supplementary to a broader unit on evolution or geology.

Students develop classification scheme that meets the established rules of the Linnaean system. They write one page essay on classification choices.

Students investigate how body design affects balance. They make simple models of dinosaur bodies using straws and marshmallows. Before making their models, they discuss the effects of gravity and the importance of balance in body shape.

Learners demonstrate how scientists use evidence to formulate hypotheses. They write an essay describing the Cretaceous and Paleocene time periods from the point of view of someone living in that time. In addition, they formulate...

Alphabetical listing from the University of California of info on each of the animal phyla. Includes scientific and common names and photos. Characteristics of each group are explained in detail.

A good site to begin your study of grasslands as it gives clear definitions of terms and an explanation of how the grasslands came into existence.

Robert T. Bakker, paleontologist.

Discover the accuracy of dating methods and fossils because of the scientific approach used.

A concise site that describes the four basic features that all chordates share.

"The survivals and extinctions at the close of the Cretaceous are such as might be expected to result from intensely hot winds such as would be generated by extra large meteoritic impacts." This article suggests that this theory should...