Class Response: Matter

Currently in science class we are learning about matter. Matter is anything that has mass and volume such as a box, this computer, and even air. Not everything is matter however. Things like electricity, and light are not considered matter. Since all matter has mass and volume, all matter also has density. The formula for density is mass/volume. Equilibrium is when matter has no force acting upon it, therefore it is still. If so, then the object is in a state of equilibrium. Also, there are four phases of matter: solid, liquid, gas, and plasma. Plasma has the highest energy and solid has the least energy. Matter can also change phases. When matter changes from liquid to gas it is called evaporation. Not all liquids evaporate at the same temperature however, for example cooking oil at room temperature. In this case, molecules "do not tend to transfer energy to each other in a pattern sufficient to frequently give a molecule the 'escape velocity'" http://en.wikipedia.org/wiki/Evaporation
http://dictionary.reference.com/browse/equilibrium