V
matter
anything that has mass and takes up space
density
the ratio of the mass of a substance to its volume
chemical change
a change in which one or more substances combine or break apart to form new substances
condensation
the change of state from a gas to a liquid
precipitate
a solid that forms from a solution during a chemical reaction
atoms
the basic particles from which all elements are made
the smallest particle of an element that has properties of that element
surface tension
the result of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together
open system
a system in which matter can enter from or escape to the surroundings
Charles's Law
a principle that describes the relationship between the temperature and volume of a gas at constant pressure
exothermic change
a change in which energy is released
vaporization
the change of state from a liquid to a gas
viscosity
a liquid resistance to flowing
thermal energy
the total energy of the motion of all the particles in an object
evaporation
the process by which molecules at the surface of a liquid absorn enough energy to change to a gas
endothermic change
a change in which energy is absorbed
products
a substance formed as a result of a chemical reaction
volume
the amount of space that matter occuppies
liquid, gas, and solid
liquid: a state of matter that has no definite shape but a definite volume
gas: a state of matter with no definite shape or definite volume
solid: a substance with a definite shape and a definite volume
closed system
a system where matter can not escape or enter
sublimation
the change in state from a solid directly to a gas without passing through the liquid state
Boyle's Law
a principle that describes the relationship between pressure and volume of a gas at a constant temperature
physical change
a change that alters the form or appearance of a material but does not make the material into another substance
mass
the amount of matter in an object and the SI unit for mass is the kg
reactants
a substance that enters into a chemical reaction
freezing
the change in state from a liquid to a solid