Easy
anything that occupies space and has mass
a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes
Model
a constructed copy of an object that is designed to represent that object
physical model
molecules are very very close to each other
Solid
a picture that shows exactly how an experiment has been set up
diagram
one of the distinct forms that different phases of matter take on (solid, liquid or gas)
state of matter
one of the very small parts of matter (as a molecule, atom, or electron)
particle
cannot be created nor destroyed, can only be transferred from one form to another
energy
the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius
temperature
it has no fixed shape or volume.
gas
it follows the size of its container
liquid
uses a mathematical description, or model, of a real system in the form of a computer program.
computer simulation