Grade 9 Science

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Grade 9 Science Unit 1 Chemistry
Matter Physical and Chemical Properties Physical and Chemical Change Safety
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Inside the Atom
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The substance made up of one type of particle
(atom / molecule)
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What is Pure Substance?
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The substance made up of only one kind of
element
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What is an Element?
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Mixture
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What is the substance made up of MORE THAN one
type of particle (atom / molecule)?
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It has the same composition throughout
(homogeneous) ANDit is made up of more than one
particle.
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What is a Solution?
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Mechanical Mixture
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What is it does NOT have the same composition
throughout (heterogeneous) ANDit is made up of
more than one particle?
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The behaviour of a substance as it becomes a new
substance when it interacts with another
substance .
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What is Chemical Change?
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The measure of how easily a liquid flows.
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What is Viscosity?
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The ability of a substance to burn
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What is Combustibility?
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A characteristic of a substance that can be used
to identify the substance.
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What is Physical Property?
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The property that DOES NOT change the chemical
nature of matter.
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What is Physical Property?
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Number of protons Number of neutrons
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What is Atomic Mass?
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The Subatomic Particles found in the nucleus
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What are Protons and Neutrons?
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These have virtually no mass and they are found
in orbits circling around the outside of the
nucleus
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What are Electrons?
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Subatomic Particle with a positive charge
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What is a Proton?
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The net charge of an element That is, proton
charge electron charge
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What is Neutral or No Charge?
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The substances remains the same BUT its state
changes.
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What is Physical Change?
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A new colour will appear,Heat or light is given
off,Bubbles of gas form, and/orA solid material
forms from a liquid.
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What are clues that Chemical Change or a chemical
reaction has occurred?
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The substance is changed into one or more
different substances AND the new substance(s)
have different properties from the original one.
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What is Chemical Change?
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Melting ice
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What is a Physical Change?
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The name for the substance when a solid
material forms from a liquid.
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What is a Precipitate?
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WHMIS symbol
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What isa Toxic Material with immediate and
severe hazard?
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It may ignite spontaneouslyor may release
flammable products if allowed to degrade or
exposed to water
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What isFlammable or Combustible?
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WHMIS symbol
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What is Compressed Gas?
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The Household Hazardous Symbol
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What is Corrosive?
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These chemicals (1) may cause anaphylactic
shock (2) include viruses, yeasts, molds,
bacteria, and parasites that affect humans, and
(3) include fluids that contain toxic
substances
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What are Biohazardous Infectious Materials