Pages 11, 12, 13 grade 9 booklet chapter 1.notebook
January 22, 2015
1. Matter can be defined as anything that has two particular physical properties. What are these properties?
Mass
Volume
___________________ and ___________________
2. What happens in a chemical change?
A new chemical is formed by combining at least two
elements.
3. What happens in a phyiscal change?
The appearance may change or you may have a change
of state (liquid to solid, gas to liquid etc.)
4. Explain the term combustibilty.
To be capable of igniting and burning.
5. Provide an example of a chemical and a physical change of aluminum.
Put acid on it; Al will burn in oxygen if the outer layer is damaged
Chemical: ________________________________________
melt; bend; etc.
Physical: ________________________________________
6. Classify the following as chemical or physical.
a) cotton balls are soft: Physical
b) water boils at 100oC: Physical (change of state)
c) Diamonds can be used to cut glass: Physical
d) sugar dissolves in water: Physical
e) propane is a gas: Physical
f) propane burns in air: Chemical
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Pages 11, 12, 13 grade 9 booklet chapter 1.notebook
January 22, 2015
7. Water and gasoline are both clear liquids at room temperature. Describe one physicaly property and one chemcail property tha tmight be used to distinguish between them.
Chemical: Gasoline vapour will burn.
Physical: Gasoline has a smell.
11. What does each of the following terms mean?
a) malleabiilty a material can be shaped or
hammered into a sheet without
breaking
b) boiling point: The point at which a substance boils
c) ductility Able to be drawn into a wire (think copper wire)
d) conductivity The ability to conduct heat or electricity
e) solubility The ability to dissolve in water
f) texture The feel, appearance, or consistency of a
substance
g) viscosity The thickness or thinness of a substance
and its resistance to flow.
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Pages 11, 12, 13 grade 9 booklet chapter 1.notebook
January 22, 2015
12. Whivh physical property is the ration of the mass of a sbustance divided by its volume? Density
13. Select any four of the physical properties listed in Table 1.1 on page 18 and use them to descirbe:
Colour: yellow
a) gold _________________
Lustre: shiny
_________________
State: solid
_________________
Malleability: most
_________________
malleable of all
metals
b) sugar
Colour: white
_________________
Lustre:
has a small shine
_________________
State: solid
_________________
Texture:
sandy/grainy
_________________
/rough
c) water
Colour: clear
_________________
Viscosity: low
_________________
State: liquid
_________________
Malleability: No
_________________
14) What was the main goal of the alchemist?
To turn common metals/elements into gold.
15) What was the difference between Dalton's model of the atom and Thomson's model?
Dalton suggested that the atom was the smallest
particle in an element. However, Thomson suggested
there were even SMALLER particles within an atom
(protons, electrons and neutrons.
16) What did Rutherford discover in his gold foil experiment
All atoms have a nucleus which contains protons (+
charge) and neutrons (no charge)
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Pages 11, 12, 13 grade 9 booklet chapter 1.notebook
January 22, 2015
17) What was the difference between Thomson's model of the atom and Rutherford's model?
Thomson suggested the entire atom was positively
charged with electrons embedded in it.
Rutherford suggested the atom contained a nucleus
that was positively charged with electrons moving
about the nucleus.
18) What did Bohr discover about how electrons are arranged in atoms?
They are arranged in energy levels or shells.
19) What type of charge does the nucleus have? Postive
20) What type of charge do electrons have? Negative
21) What are two properties that protons and electrons have in common?
1. They both have a charge.
2. ??
22) Which two subatomic particles are nearly equal in mass?
Protons and neutrons.
23) Which part of the atom accounts for most of its volume?
The nucleus.
24) What is the difference between a theory and a law?
Laws are descriptions of events, patterns, or
relationships that have been observed over and over.
Laws do not provide explanations - they simply state
what happens.
Theories are explanations of observations that are
supported by reliable evidence.
Laws will NOT change, while theories can.
25) How are new theories developed?
Scientists continue to study the many aspects of
science and continuously become aware of new
information and new ideas. After much research,
scienctists can develop theories.
26) Neutral atoms have no overall electric charge even though protons and electrons have an electric charge. Explain.
There are the same number of protons and electrons
so they cancel each other out.
Think zero pairs from math...
+2 and -2 cancel each other out so you are left with 0!
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Pages 11, 12, 13 grade 9 booklet chapter 1.notebook
January 22, 2015
25) How are new theories developed?
Scientists continue to study the many aspects of
science and continuously become aware of new
information and new ideas. After much research,
scienctists can develop theories.
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