# vocab.

The three most common forms, or states, of matter on Earth are? solids, liquids, and gases.
most common state of matter in space? plasma
Some ways to describe matter are… describe the state, color, texture odor, and by using measurements such as mass, volume, and density.
The main factor that determines the state of matter are? particles motion and particle forces
SOLIDS matter that has a definite shape and a definite volume. Particles in a solid are close together
LIQUIDS matter with a definite volume but no definite shape. Liquids can flow and take the shape of their containers. Particles move faster than a solid and in turn move slightly father apart.
Viscosity a measurement of a liquids resistance to flow. Ex: honey has a high viscosity and water has a low viscosity
Surface Tension the uneven forces acting on the particles on the surface of a liquid.
GASES matter that has no definite volume and no definite shape. Particles move even farther apart than solids or liquids. Particles spread out to fill a container.
Vapor the gas state of a substance that is normally a solid or a liquid at room temperature.
Melting change of matter from a solid to a liquid. Thermal energy must be added.
Freezing change from a liquid state to a solid state.
Vaporization change from a liquid to a gas.
Sublimation change of state from a solid to a gas without going through the liquid state. Ex. Dry ice
Deposition change of state of a gas to a solid without going through the liquid state
Molecular Theory: is an explanation of how particles in matter behave. *small particles make up all matter.
*these particles are in constant random motion
*the particles collide with other particles, other objects, and
the walls of their contai
Pressure is the amount of force applied per unit of area. When particles collide with their container, pressure results.
Pressure and Volume when the volume is greater, the particles have more room to move (fewer collisions-pressure is less).
Boyle's Law: states that pressure of a gas increases if the volume decreases and pressure of a gas decreases if the volume increases, when temperature is constant.
Charles Law states that the volume of a gas increases with increasing temperature, if the pressure is constant.
At absolute zero or 0 K (kelvin) all particles are at the lowest possible energy state and do not move.