Students explore that prehistoric people had to have a good knowledge of the physical world around them in order to choose the best material for spear production. They also explore that prehistoric people were intelligent beings who...

Students discover how to estimate the age of redwood trees. They measure the trees' diameters by using string to calculate the circumferences. Students conclude by discussing the science of dendrochronolgy.

Students examine how to conduct simple investigations and use simple equipment to gather data.  In this magnet instructional activity students decide what types of objects are attracted to magnets. 

Students locate transistor devices in school. They explain the importance of transistors.

Students practice measuring the height of redwood trees. On a group walk, they observe the height of various trees and identify the species. In groups, they use their geometry skills and other techniques to measure the tree and determine...