PHYSICAL PROPERTIES can determine physical property by using five senses as well as measuring instruments can be determined without making any changes to substance

hard soft HARDNESS

plastic crystalline CRYSTAL SHAPE

malleable brittle MALLEABILITY

viscous less viscous VISCOSITY

conducts electricity insulator ELECTRICAL CONDUCTIVITY

very dense less dense DENSITY

Physical Properties can be either qualitative or quantitative Qualitative physical property: a characteristic of a substance that can be described but not measured ex. colour, smell Quantitative physical property: a characteristic of a substance that can be measured ex. boiling point, density

Identify the following physical properties as qualitative or quantitative: taste  malleability  melting point  state  viscosity  solubility  texture  density  crystal shape  ductility  electrical conductivity  qualitative quantitative

CHEMICAL PROPERTIES describes ability to undergo changes to produce new substances

POTASSIUM Silver-white solid Boiling point of 759 °C Disintegrates when exposed to air Ignites with exposure to water

ARSENIC Metallic grey solid Layered structure Semiconductor High toxicity

SULFUR Bright yellow crystalline solid Unpleasant odour Insoluble in water Burns to produce sulfur dioxide

ZINC Blue-white lustrous metal Brittle at room temperature Tarnishes Burns in air with blue-green flame Reacts with acids

PHYSICAL CHANGES a change in which the composition of the substance remains unaltered and no new substances are produced can involve a change in form or state and is usually reversible

CHEMICAL CHANGE Change that causes at least one new substance with new properties to form The original substances rearrange to form new substances

FIVE MAIN SIGNS OF A CHEMICAL CHANGE change of colour change of odour formation of bubbles production of precipitate change in temperature or light

What are three physical properties of chocolate? Uncooked spaghetti noodles are hard, brittle and measure 25.5 cm. Which properties are qualitative? Which properties are quantitative? Classify each description as a physical or chemical property: a) Wood burns (b) clay is brown, (c) steel wool rusts Water and gasoline are both clear liquids at room temperature. Describe one physical property and one chemical property that might be used to distinguish between them.