35 terms

Ch 2 - 3

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Physical Property
A characteristic of a substance that does not involve a chemical change, such as density, color, or hardness.
Density
The ratio of the mass of a substance to the volume of the substance.
Thermal Conductivity
The rate at which a substance transfers heat.
State of Matter
The physical forms of matter, which include solid, liquid, and gas.
Ductility
The ability of a substance to be pulled into a wire.
State
The physical form in which a substance exists.
Malleability
The ability of a substance to be rolled or pounded into thin sheets.
Physical Change
A change of matter from one form to another without a change in Chemical Properties.
Chemical Properties
A property of matter that describes a substance's ability to participate in chemical reactions.
Flammability
The ability of a substance to burn.
Reactivity
The ability of two or more substances to combine and form one or more substances.
Characteristic Properties
the properties that are most useful in identifying a substance.
Chemical Change
Happens when one or more substances are changed into new substances that have new and different properties.
Composition
The type of matter that makes up the object and the way that the matter is arranged in the object.
Solid
The state of matter in which the volume and shape of a substance are fixed.
Crystalline Solids
Solids that have a very orderly, three dimensional arrangement of particles.
Amorphous Solids
Solids that are made of particles that do not have a special arrangement.
Liquid
The state of matter that has a definite volume but takes the shape of its container.
Surface Tension
A force that acts on the surface of a liquid and that tends to minimize the area of the surface.
Viscosity
A liquid's resistance to flow.
Gas
The state of matter that has no definite shape or volume.
Change of State
The change of a substance from one physical state to another.
Melting
The change of state in which a solid becomes a liquid by adding energy.
Melting Point
The temperature at which a substance changes from a solid to a liquid.
Freezing
The change of state from a liquid to a solid.
Freezing Point
The temperature at which a liquid changes into a solid.
Exothermic Change
Energy is removed from the substance as it changes state.
Endothermic Change
Energy is added to the substance as it changes state.
Evaporation
The change of a substance from a liquid to a gas.
Boiling
The conversion of a liquid to a vapor when the vapor pressure of the liquid equals the atmospheric pressure.
Boiling Point
The temperature at which a liquid boils.
Condensation
The change of state from a gas to a liquid.
Condensation Point
The temperature at which the gas becomes a liquid.
Sublimation
The change of state in which a solid changes directly into a gas.
Solubility
The ability of a substance to dissolve in another substance.