Chapter 1:
The Science of
Chemistry
Changes SI Units &
of Matter Measurement
Density
Properties Classification
of Matter of Matter
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Boiling water is an
example of what kind of
change?
Physical.
Changes of Matter 10
Identify the two states of
matter shown in the
physical change below:
liquid
gas
Changes of Matter 20
Give an example of a
chemical change and
explain why it is a
chemical change.
Changes of Matter 30
Liquid water is frozen into ice.
Describe the motion of water
molecules in each state.
Liquid: molecules
slide past one
another. They
move more freely
than solids, but
less so than
gases.
Solid: molecules
are very close
together and
organized.
Vibration is their
only motion.
Changes of Matter 40
Name all four indicators
that suggest a chemical
change has occurred.
Color change, formation of a
gas, formation of a precipitate,
change in energy.
Changes of Matter 50
The quantity mass is
represented by what
symbol?
m
SI Units & Conversions 10
What unit is associated
with the quantity n?
mole
SI Units & Conversions 20
Every measurement has
two parts/components.
What are they?
Quantity and unit.
SI Units & Conversions 30
What is a derived unit
and why do we need
them?
A combination of 2 or more
units. Some quantities cannot
be represented with only one
unit.
SI Units & Conversions 40
Why was the SI system
developed?
To unify all measurements
worldwide.
SI Units & Conversions 50
What is the formula for
density?
D = m/V
Density 10
Density may be found by
calculating the slope of a
line on a graph. What
should the x and y axis
be on these graphs?
x = volume y = mass
Density 20
Name a frequently used
derived unit for density.
g/mL or
3
g/cm
Density 30
In order to calculate
density, you must know m
and V. One way to find V
for a solid is by using a
ruler. What is the other
method?
water displacement
Density 40
Calculate the volume given
the following:
D = 1.35g/mL and
m = 16.8g. Must show all work!
Round to one decimal place.
V = 12.4mL
Density 50
What kind of property is
flammability?
chemical
Properties of Matter 10
What is a physical
property?
A property that can be
observed without changing
the identity of the substance.
Properties of Matter 20
Which of the following
properties are physical:
density, reacts with water,
chemical stability, taste,
and smell.
density, taste, and smell
Properties of Matter 30
How do we determine
chemical properties?
By trying to cause a
chemical change/actually
performing a test.
Properties of Matter 40
Nails rust easily. Explain
WHY this is a chemical
property.
In testing its ability to rust, the
chemical identity of the nail is
changed (it chemically reacts
with oxygen).
Properties of Matter 50
Mixtures can be further
classified into two types.
What are they?
homogeneous and
heterogeneous
Classification of Matter 10
In which category would
you classify a sample of
lead (Pb)?
element
Classification of Matter 20
A glass of water (H2O) and a
piece of magnesium (Mg) are
both considered what?
pure substances
Classification of Matter 30
Consider a glass of tea without
ice cubes, and a glass of tea with
ice cubes. How would you
classify each? Why?
Before: homogeneous; the tea is evenly
mixed (appears to be all one substance).
After: heterogeneous; you can visibly
distinguish the ice from the tea- they’re not
uniformly mixed.
Classification of Matter 40
Name a difference between
mixtures and compounds.
1. Mixtures- physically mixed,
compounds- chemically mixed.
2. Mixtures- amounts can vary,
compounds- definite composition.
3. Mixtures do reflect properties of
components, compounds do not.
Classification of Matter 50