Chemistry

2. a division on the kelvin scale, the SI unit of temperature
5. a gas in which the particles undergo elastic collisions
7. the force acting on a unit area of a shape
8. the measure of the average kinetic energy of the particles that makes up a material
9. the process by which particles of a liquid form a gas by escaping from the liquid surface
11. the process where gaseous particles come together, that is, condense, to form a liquid or sometimes a solid
12. the SI unit of energy; the energy required to lift a one-newton weight one meter against the force of gravity
13. the set of conditions 0.00°C and 1 atmosphere
14. a flowing substance with a definite volume but not a definite shape

1. the process by which a gas enters a container and fills it, or when the particles of two gases or liquids mix together
3. at constant pressure, the volume of a gas is directly proportional to its Kelvin temperature
4. the temperature of a solid when its crystal lattice begins to break apart
6. the temperature scale defined so that the temperature of a substance is directly proportional to the average kinetic energy of the particles and so that zero on the scale corresponds to zero kinetic energy
10. a flowing, compressible substance with no definite volume or shape
13. a substance in which the particles occupy fixed positions in a well 3-D shape