The States of Matter 8 th gr. Chemistry

S,L,G Category Sort  In your group read the cards provided and decide if the card describes a solid, liquid, or a gas; and then sort.

Solid  Molecules have been packed together tightly  Definite shape  Definite volume  Particles have very little energy  Cannot be compressed easily  Becomes a liquid when heat energy is added  Does not flow easily

Liquid  Definite volume  Cannot be compressed easily  Molecules in a liquid are more spread out than a solid, but less spread out than a gas  Shape changes depending on the container  Does not hold a shape  Flows easily  Becomes a gas when heat energy is added  Becomes a solid when heat energy is taken away

Gas  Molecules in a gas spread to fill the entire space they are in  Molecules have the most amount of energy  Does not hold a shape  Easily compressible  Becomes a liquid when heat energy is taken away

S,L,G Simulator  ty/states_of_matter/index.html ty/states_of_matter/index.html

Kinetic Theory of Matter  All matter (solid, liquid, and gas) is made up of tiny particles called atoms, or atoms that are joined to form molecules.  All particles are in constant and random motion.  The particles are colliding with each other and the walls of their container.