In 1879, Sir William Crookes discovered the fourth state of matter, plasma. The presentation covers states of matter, phase changes, density, pressure Pascal's Principle, buoyant force, Archimedes' Principle, Bernoulli's Principle,...

What do Star Wars, Indiana Jones, and The Odyssey have in common? Why, they are all epics, of course, and are presented here as examples of the literary term. If you are beginning a study of epics, consider previewing the terms included...