Vision Learning
Vision Learning: States of Matter
Did you know the ancient Greeks first identified the three states of matter? Read about how the molecules differ in solids, liquids, gases, and plasma. View photographs and watch how the molecules move in each state. If you're really...
PBS
Pbs Learning Media: Phases of Matter: Interactive Lesson
Learn about the three phases of matter, and how the addition and removal of thermal energy (also known as heat) affects them.
Other
Atoms in Motion: All Matter Is Made of Atoms
Atoms are very, very small. Atoms are so small that it is often said that there are as many atoms in a single grain of sand as there are grains of sand on all of the world's beaches - certainly a difficult thing to prove, but you get the...