Grade 9 Academic Science Cardinal Ambrozic Catholic Secondary School

 Characteristics of a substance that can be determined without changing the composition of the substance  How can we observe and determine physical properties?

 Properties of a substance made using our senses. This does not provide us with numerical information.  Example: Mr. Selvam is brown and his pants are black.

 Properties of a substances made by making measurements using measuring devices. This does provide us with numerical information.  Example: Mr. Selvam is 6 ft. tall

 Colour  Is the matter red, green, yellow, colourless…  Odour  Is it odorless, spicy, sharp, pungent…  Taste  Is it sweet, sour, salty, bitter…  Texture  Is it fine, coarse, smooth, gritty…

 Pretty easy to understand!

 The feel or shape of a surface or substance  An object can be smooth or rough

 A property of a substance that someone can experience with the sense of smell

 The level of reflection or the shininess of an object

 The ability of a substance to allow light through Describe the following glasses? TYPE OF OPTICAL CLARITY DEFINITION TRANSPARENT TRANSLUCENT OPAQUE

 The breakability or flexibility of an object

 Viscosity refers to the flow of a liquid and its resistance.  High Viscosity = Thick Fluid = Less Flow  Low Viscosity = Runny Fluid = More Flow

 The ability of a substance to scratch or be scratched by another substance

 Ability to be hammered, beaten or rolled into shape without breaking apart

 Ability to be stretched without breaking apart or being drawn into wire

 The ability of a substance to allow electric current and heat to pass through

 The ability of a substance to form crystals  Even household substances look like crystals close up – Can you guess the image on the right?

 The ability of a substance to dissolve in a liquid (like water)

 The temperature of boiling (liquid to gas) or (gas to liquid) condensation  This is usually the same temperature  For water, this temperature is 100 C

 Temperature of melting (solid to liquid) or freezing (liquid to solid)  This is usually the same temperature  For water, this is 0 ºC

 Can either be in the form of a solid, liquid or a gas

 The properties and abilities of a substance when in changes into a new substance in a chemical reaction  How can we determine the chemical properties of matter?

 The property of being capable of igniting into a flame, producing heat or producing light

 The ability of a substance to react with acid  Magnesium + Acid  We will see in next class!

 What properties are present in this breakfast?