2. A solid Has a definite volume and definite shape. Particles packed tightly together and stay in fixed positions.

3.  Crystalline solids- Solids that are Made up of crystal  Amorphous- solids whose particles are not arranged in any particular order.

4.  Liquid- A liquid has no shape of it’s own and take shape of a container.  Particles are packed almost as close as solids but are free to move.  No definite shape.  Has a definite volume.  Viscosity- is a resistance of a liquid to flowing.  Fluid- means a substance that flows.

5.  Gasses- No definite shape, no definite volume.  Gas particle spread apart filling any space available to them.

6.  Measurement-  Volume- amount of space matter fills.  Temperature- is a measure of the average energy of motion of particles of a substance.  Pressure- The force of its outward push divided by the area of the walls of the container.

7.  As the pressure goes up the volume goes down.  An inverse relationship.  The line on a graph goes down.

8.  A direct relationship.  As pressure increases the temperature increases.  For example, a truck whose tires increase in temperature run the risk of having their tires explode.

9. As the temperature rises the volume rises. Example- as a semi’s trucks tires heat up they have to check the pressure because the increase in volume could cause them to explode.

10. Graphs- are diagrams that tell how two variable's are related X axis- is the manipulated variables(independent) Y axis- the observed variable (Dependent) Charles law- is directly proportional, meaning the line will go up. Boyles law- is inverse meaning the line will go down.

11.  Physical change- is alters the appearance of a substance, but does not change it.  Chemical change- changes into a different substance.

12.  Thermal energy- energy created from the movement of particles, in the form of heat.  Chemical energy- energy that comes from chemical bonds.

13.  In any physical or chemical change the amount of energy stays the same.

14.  A substance can change from anyone state of matter to another, under certain conditions  Melting- the change from a solid to a liquids.  Freezing- change from a liquid to a solid  Vaporization- change from a liquid to a gas Evaporation- when vaporization takes place on the surface of a liquid. Boiling- when vaporization takes place through out the liquids

15.  The change from a solid to a gas without entering the liquid phase.