States of Matter Crossword

A very tiny object such as an atom or molecule, too small to be seen with a microscope.
The process by which particles in liquids or gases spread out through random movement from a region where there are many particles to one where there are fewer.
Caused by collisions of particles with the walls of a container.
How much matter there is in a particular volume, or how close the particles are
Change from liquid to gas at the surface of a liquid, at any temperature.
Change from liquid to a gas of all the liquid when the temperature reaches boiling point.
Change of state from gas to liquid when the temperature drops to the boiling point.
Change from solid to liquid when the temperature rises to the melting point.
Change from liquid to a solid when the temperature drops to the melting point
Change from a solid directly into a gas.
A way to think about how substances behave in terms of small, moving particles.