Thermal Conduction

The rate at which a substance transfers heat.

State

The physical form in which a substance exists, such as solid, liquid or gas.

Density

The mass per unit volume of a substance. D=m/v

Solubility

The ability of a substance to dissolve in another substance.

Ductility

The ability of a substance to be pulled into a wire.

Malleability

The ability of a substance to be rolled or pounded into thin sheets

Physical property

A characteristic of a substance that does not involve a chemical change, such as density, color, or hardness.

Physical change

A change of matter from one form to another without a change in chemical properties.

Chemical property

A property of matter that describes a substance's ability to participate in a chemical reaction. Examples are: flammability, reactivity.

chemical change

When one or more substances are changed into new substances that have new and different properties. examples of chemical change are: soured milk, effervescent tablets.

characteristic properties

A quality of a substance that never changes and can be used to identify a substance. characteristic properties can be physical: density and solubility; or chemical: flammability and re-activity.

states of matter

the physical form of matter: solid, liquid, and gas.

solid

has a definite shape and volume.

liquid

has a definite volume but does not have a definite shape.

gas

a form of matter that does not have a definite volume or shape.

Flammability

The ability of s substance to burn.

Reactivity

The ability of two or more substances to combine and form one or more new substances.

Physical vs. Chemical properties

You can observe physical properties (density, shape, volume) without changing the substance. Chemical properties (flammability, reactivity) are not easy to observe.