 States of Matter InteractivesSolids, liquids and gases are all forms of matter, the stuff that makes up everything around us. |  Chem4KidsInformation on matter, atoms, elements, the periodic table, reactions, and biochemistry. |  DemocritusDemocritus (460 BCE 370 BCE) was an ancient Greek philosopher. He is known for his influence on modern science more than any other pre-Socratic philosopher. He was also known as the “Laughing Philosopher", for his tendency to mock fellow citizens for their follies. |
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