grade 9 academic science cardinal ambrozic catholic secondary school
TRANSCRIPT
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Grade 9 Academic Science
Cardinal Ambrozic Catholic Secondary School
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Characteristics of a substance that can be determined without changing the composition of the substance
How can we observe and determine physical properties?
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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.
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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
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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…
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Pretty easy to understand!
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The feel or shape of a surface or substance
An object can be smooth or rough
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A property of a substance that someone can experience with the sense of smell
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The level of reflection or the shininess of an object
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The ability of a substance to allow light through
Describe the following glasses?
TYPE OF OPTICAL CLARITY
DEFINITION
TRANSPARENT
TRANSLUCENT
OPAQUE
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The breakability or flexibility of an object
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Viscosity refers to the flow of a liquid and its resistance.
High Viscosity = Thick Fluid = Less Flow Low Viscosity = Runny Fluid = More
Flow
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The ability of a substance to scratch or be scratched by another substance
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Ability to be hammered, beaten or rolled into shape without breaking apart
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Ability to be stretched without breaking apart or being drawn into wire
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The ability of a substance to allow electric current and heat to pass through
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The ability of a substance to form crystals Even household substances look like
crystals close up – Can you guess the image on the right?
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The ability of a substance to dissolve in a liquid (like water)
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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
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Temperature of melting (solid to liquid) or freezing (liquid to solid)
This is usually the same temperature For water, this is 0 ºC
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Can either be in the form of a solid, liquid or a gas
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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?
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The property of being capable of igniting into a flame, producing heat or producing light
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The ability of a substance to react with acid
Magnesium + Acid We will see in next class!
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What properties are present in this breakfast?