Mentos' microscopic pores create nucleation sites for carbon dioxide bubbles. Carbon dioxide bubbles form in Mentos' irregular surface structures. Rapid release of dissolved carbon dioxide creates pressurized foam. Narrow bottle neck intensifies pressure and speed of reaction
Titration determines reactant concentration in unknown solution. Requires calibrated burette, stand, multiple beakers, and titrant. Clean burette and glassware thoroughly with deionized water. Measure analyte amount precisely and add color indicator if needed
Heat ½ cup water until it bubbles, then add 1/4-1/2 cup salt. Stir until salt grains don't dissolve, creating supersaturated solution. Pour solution into clean container and hang pencil-string mixture. Place in cool, shaded place for single crystals, sun for clumps. Table salt takes 1-2 days, Epsom salt grows faster
Scientific method is a systematic way of learning about the world. Method involves making hypotheses and testing them through experiments. Anyone can use it by asking questions and finding answers
Experiment is a procedure to support or refute hypotheses or determine untried things. Experiments demonstrate cause-and-effect by manipulating factors. Experiments vary in scale but always rely on repeatable procedures
Test tubes are finger-like glass or plastic tubes with open tops and closed bottoms. Chemistry tubes typically range from 10-20mm wide and 50-200mm long. Most chemical tubes are made of glass for heat resistance. Tubes often feature flared lips and ground glass markings