Physical State

• Matter can exist in three forms, or physical states: liquid, solid, or gas.

• Matter can change from one physical state to another by the processes of melting, freezing, evaporation, and condensation.

• Temperature changes can affect changes in state.

Mass

• Mass is the amount of matter in an object.

• Mass is measured with a balance.• Mass is not the same as weight. • Weight is a measurement of the pull of

gravity on an object. • Weight is measured with a scale.

Magnetism

• Matter that contains iron, nickel, cobalt, or steel will be attracted to a magnet.

• Not all metals are attracted to a magnet.

Relative DensitySinking & Floating

• Weight doesn’t determine if an object will sink or float.

• The volume of an object and how much “stuff” (matter) is in the object will determine the density.

Conduction

• Some materials allow thermal (heat) energy or electrical energy to flow through them easily.

• These materials are called conductors.

Insulation

• Some materials do not allow thermal (heat) energy or electrical energy to flow through them easily.

• These materials are called insulators.

Solubility in Water

• Solubility refers to the ability of a substance to dissolve when added to water.

• A liquid, solid, or gas can be dissolved in water. Examples may include lemon juice in water, sugar in tea, and the carbonation in a soda.

Does it Matter?

• Matter has properties that can be observed and measured.

• These properties determine how matter is: Classified Changed Used