Intro to matter 4
Chemical Change
produces one or more new substances includes Rusting, burning, Tarnishing, electrolysis
Volume
the amount of space that matter occupies
Surface Tension
Particles on a surface of a liquid stick together.
Solid
Definite shape and volume, fixed arrangement of particles.
Viscosity
when particles flow past each other in a liquid and how hard it is to do that is viscosity.
Law of Conservation of Mass
Matter is not created or destroyed in any chemical or physical change!
Chemical Energy
Energy stored in the chemical bonds.
Boiling
When liquid has enough energy to change into a gas anywhere in the liquid.
Fluid
Particles flow past each other in a liquid
Vaporization
Particles gain enough energy to form a gas
Endothermic Change
A change in which energy is taken in
Temperature
Average energy of particle motion in a substance
Crystalline Solid
No regular pattern, soften as they get warmer, ex. Minerals and sugar.
Melting
pure substances, melting occurs at a specific temperature
Gas
no definite shape or volume, spread to fill the container they are in.
Density
measure of the mass of a material in a given volume.
Exothermic Change
A change in which energy is put out.
Evaporation
Molecules on surface have enough energy to break off (evaporate)
Freezing
Occurs at same temperature as Melting, but when you lose heat instead of gain it
Amorphous Solid
have a specific structure and melting point, ex. plastic, rubber, glass, butter, wax
Thermal Energy
total energy of a substance’s particles
Physical Change
does NOT change the substance into a different substance, but alters the form or appearance of matter.
Liquid
Definite volume but no definite shape, change shape but don’t change size.
Melting Point
pure substances, melting occurs at a specific temperature, called Melting point.
Pressure
The force exerted by one object on another.