Most substances can exist as a solid, liquid or gas. They can change state, usually when they are heated or cooled. For example, liquid water turns into water vapour when it is heated enough ...

We all know from middle school science class that matter changes between a solid, a liquid, and a gas when you change the temperature or pressure acting on it. (Yes, some elements will change ...

Use your science knowledge and apply it using physical activity! Learn about the stages of matter, solid, liquid and gas, then perform an exercise for each as the teacher calls out an object such ...

Water is the only substance on Earth that occurs naturally as a solid, liquid, and gas ... matter into other forms—for example, converting carbon dioxide gas into solid carbon dioxide (dry ...