Ninth graders compare and contrast how different models can be used to represent scientific understandings. They evaluate the use of data when considering scientific claims. Students debate a variety of socio-scientific issues and the...

This second lesson in a course on dinosaurs is devoted to extinction. There are group activities, discussion of the idea, and a way to assess what the students have learned.

"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...