Students explain that air pressure applies a force. If any of students have flown in an airplane, they have felt the "popping" of their ears caused by the change in atmospheric pressure because of the altitude changes.

We can't see most gases and we can't see things at the molecular level — but that's about to change! A simulation shows pupils the activity of molecules in a gas. The simulation allows scholars to vary the volume, heat, and...

Teams of Texas tourists gather into groups to analyze what they can do with $50 worth of an alternative fuel. They write checks, keep a balance sheet, and map out their sight-seeing route taking into consideration the location of...

Make sound waves visible with an experiment that asks middle schoolers to build a model ear drum using plastic bottles, rubber bands, plastic wrap, and sand-like substances.

Your geology class practices taking core samples of a potato to examine the stratigraphy. This is a terrific modeling activity that helps youngsters visualize strata that cannot be seen from the surface of the ground. The directions...