Describing Matter Section 2

Matter Is anything that has volume and mass. All matter takes up space. That amount of space occupied by an object is known as the object ’ s volume. Mass is the amount of matter that something is made of.

Physical Properties Physical properties of matter can be observed or measured without changing the identity of the matter.

State The physical form in which a substance exists, such as a solid, a liquid or a gas Ice is water in its solid state Steam is water in the gas state Water is water in the liquid state

Malleability The ability to be pounded into thin sheets example Aluminum foil

Ductility The ability to be drawn or pulled into a wire. Copper is often used to make wiring.

Solubility The ability to dissolve in another substance Sugar dissolves in water

Density density column Some examples of units for density g/mL for liquids g/L for liquids g/cm 3 for solids

Density Density- is the ratio of the mass of a substance to the volume of the substance.

Thermal Conductivity Is the rate at which a substance transfers heat

Physical Changes Do not change the identity of a substance and are sometimes easy to reverse Some examples: 1) Butter can be melted and then it can be put in the refrigerator to reverse the change 2) Water can be frozen and then melted

More Examples of Physical Changes Melting ice cubes Sanding a piece of wood Cutting hair Crushing a can Bending a paper clip Mixing oil and vinegar