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?