Of all the quizzes on the site, this one matters the most. We are used to rocks being solid and gasoline being liquid, and we think that these things are always so. States of Matter Iron, steel, and other metals, of course, are solid. But if you really heat them a lot, they can melt to become very hot liquids. But matter isn't just solid, all matter can exist in different states, solid, liquid or gas.
Most materials can go from one state to another, depending on the temperature.
The change of state can be dramatic. The project's design is based on a constructivist model in which students are asked to formulate questions, and design and conduct experiments to address basic questions about the properties of matter. Science Classes Activities are selected from those below. The chemical test for CO2 is given higher priority for middle school, but often omitted for elementary school presentations. All of the concepts presented are done so in what is hopefully an entertaining way.