Chemthink - Particulate Nature of Matter
The Chemthink website provides a series of interactive tutorials and quizzes for students to complete as they learn different concepts in chemistry. The first module provides a solid introduction into matter, atoms, and the difference between elements, compounds, mixtures, and pure substances. This worksheet accompanies the tutorial for the first module, encouraging students to read and understand the animations instead of simply clicking through.
Essential concepts: Matter, atoms, elements, compounds, molecules, pure substances, mixtures, phases of matter, solid, liquid, gas.