1. Think of your favorite food. 2. How would you describe your food? 3. What does it look like? Smell like? Think of descriptive words.

1. Think of your favorite food. 2. How would you describe your food?3. What does it look like? Smell like? Think

of descriptive words.

There are two basic types of properties that we can associate with matter. Physical Properties: Properties that do not

change the chemical nature of matter Chemical Properties: Properties that do

change the chemical nature of matter

Some ways to detect physical properties Color Shape Size Texture Volume Mass

Physical properties do not change the substance Example – stretching a rubber band

Is a change in any physical property of a substance, not in the substance itself. Examples

Breaking a piece of clay in half Changes size and shape only

Change in a substances state of matter Example – water and ice – liquid to solid

Characteristic of a Substance that describes how it can form a new substance Examples

Wood burns and turns into ashes iron rusts when left outdoors Silver develops tarnish on the surface

The change of one substance into another substance

Affects the substances involved in the change

During change combinations of atoms in the original substance is rearranged to make new substance

Odor Produce new smell – i.e. rotten egg – produces sulfur

smell Temperature

Increase or decrease – i.e. Logs burning on campfire Color

Change in color – i.e. fruit changes color as it ripens Bubbles

Formation of gas bubbles – i.e. antacid tablet in water Solid

Forms a solid – two liquids combined called precipitate i.e. – clams shells – seawater combining with creature

Changes in Matter

Matter will change phases when heat is added or lost. Melting: process where a solid

becomes a liquid (heat is added) Melting point – lowest temperature

at which a substance begins to melt Freezing: process which a liquid

becomes a solid (heat is lost) Freezing point – temperature that

a liquid becomes a solid Evaporation: process that a

liquid becomes a gas (heat is added) Occurs at the surface of the liquid

Matter will change phases when heat is added or lost. Sublimation: when a solid

changes to a gas (heat is added) Dry ice

Boiling: Process that a liquid becomes a gas (heat is added) Boiling Point – liquid reaches a certain

temperature. Different substances have different boiling points

Condensation: process by which a gas changes to a liquid (heat is added) Beads of water on glass

Gas

Liquid

Solid

Condensation Boiling - Evaporation

MeltingFreezing

Density Compare density to other substances

Heating properties Substances respond to heat differently

Solubility How much does the substance dissolve

Electric properties Does it conduct electricity

Magnetic properties Is substance attracted to magnet