Crystallize the answer to the question that has been investigated since the first of four lessons: What is the unknown crystal? Pupils have examined, crushed, and dissolved four samples plus an unknown as an exploration of the properties...

Students explore the effects of diet and weight-bearing activities on bone mineral content. The influence of playing a variety of sports with different weight-loading levels is examined.

Students define the term simple machine, identify and appreciate their use.  In this simple machines lesson students complete an activity and share their ideas. 

Seventh graders explore the planets using computers and other forms of electronic technology. They research data on two planets and compare the data. Students make conclusions regarding the size of their planets. They calculate how long...