Properties of Matter

Make a T chart in your spiralClassify each of the following as physical or chemical

Gas production Tarnishing

Souring Expanding

Cooling Heating

Digesting Rusting

Denting Squeezing

Sawing Light production

Burning Dissolving

Stretching Rotting

Cutting Change of temperature

Melting Freezing

New substance Mixing

Drying Contracting

Physical Properties

Physical Properties A characteristic of a substance that can be

observed or measured without changing the substance

Ex: shape, color, length, mass, volume, density, odor, texture, states of matter, melting and boiling point

Physical Changes

Physical Changes do not change the composition. The substance may look different but the identity does not change Grinding Cutting Coloring Dissolving Changes in the state

***Can usually be changed back***

Chemical Properties

Chemical Properties Any characteristic that gives a substance the

ability to undergo a change that results in a new substance

Ex: Flammability, Ability to react with: oxygen, electricity,

light, water, heat etc

Chemical Changes

Chemical Changes are changes in the identity of a substance due to the chemical properties Bubbles Color change (why did it change color?) Production of Heat Production of Light Production of Smoke Formation of a new substance

Cannot usually be changed back

Law of Conservation of Mass

Matter cannot be created or destroyed In other words, the mass you end up with

is always the same as what you start with

Then where does the mass go sometimes? Ex: Wood for a campfire

Changes in Energy

Endothermic – energy is added to the substance to make it change Ex: Ice Melting, Baking bread, Evaporation

Exothermic – energy is released when it changes Ice freezing, candle burning, photosynthesis

Energy determines the state!