Students construct a geologic timeline the size of a football field. They work in small groups to calculate the yardage for significant events in the Earth's history and then as a class pace out all of the events.

Students examine an experiment in which 2 types of commercial fish are fed a new type of fish feed and a commercial fish feed which costs ten times as much. They calculate in the fish grow as well with the cheaper fish feed and then...

How do you grow crops in a area with insufficient rainfall? Why you irrigate, of course. Class members investigate irrigation systems by designing a system of their own. After examining irrigation related concepts, vocabulary terms, and...