Cell phones are likely made of gold—at least part of them! An interesting lesson explains the conventional and not-so-conventional uses of the popular element gold. From the Inca empire to modern-day technology, learners discover gold...

Students list three things about caves that interest them and list reasons why writers choose caves as settings for stories.

Students develop an understanding of our planet as a system by designing a very-long-duration space mission in which the life-support system is patterned after that of earth.

Students examine limestone cave geology and hydology. They study cave vocabulary.

Students examine how water changes state, from a liquid to a solid.  In this water lesson students study the water cycle and how temperature and pressure effect it.