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Heating
Baking
Soda
5
10
15
20
25
Water
Displacement
5
10
15
20
25
Operate a
Balance
5
10
15
20
25
Sensitivity of
a Balance
5
10
15
20
25
5
10
15
20
25
Mass &
Volume
Player 1
0
Player 3
0
Player 2
0
Player 4
0
Heating Baking Soda
What was the purpose
of the water in the
inverted bottle in Lab
1.1?
Show Answer
Heating Baking Soda
Answer for 5 Points
Collection of gas by
water displacement
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Heating Baking Soda
What could you tell
from the “Heating of
Baking Soda”
experiment alone?
Show Answer
Heating Baking Soda
Answer for 10 Points
Baking soda can be
broken down into
liquids, gas, and solids.
Back to Board
Heating Baking Soda
What was collected by
the inverted bottle in
Lab 1.1?
Show Answer
Heating Baking Soda
Answer for 15 Points
Gas-CO2
Back to Board
Heating Baking Soda
What was the purpose
of the tea test?
Show Answer
Heating Baking Soda
Answer for 20 Points
To determine if heated
baking soda was still
baking soda or
something else
Back to Board
Heating Baking Soda
Which baking
soda/tea mixture
was darker?
Show Answer
Heating Baking Soda
Answer for 25 Points
The Heated Baking
Soda
Back to Board
Water Displacement
• A group of 100 identical marbles having a total mass
of 125 g are poured into a graduated cylinder and
found to come up to the 100 cm3 mark. When the
marbles are added to 75 cm3 of water in a second
graduated cylinder, the water level rises to the 137
cm3 mark.
• What is the volume of the air between the marbles in
the first graduated cylinder, in cm3?
Show Answer
Water Displacement
Answer for 5 Points
38
3
cm
Back to Board
Water Displacement
A beaker was partially filled with water and the
water level was marked “I.” An object too
large for a graduated cylinder was completely
immersed in the water in the beaker and the
water rose to a higher level marked “II.” The
beaker was emptied and then refilled from a
graduated cylinder. It took 100 cm3 to reach
level “I” and 35 cm3 more to reach level “II.”
What was the volume of the object?
Show Answer
Water Displacement
Answer for 10 Points
35 cm3
Back to Board
Water Displacement
Enough dry sand to fill a
graduated cylinder to the
20cm3 mark was added to
another graduated cylinder
containing water and the level
of the liquid rose 12cm3 on the
scale. What was the volume
of the sand alone?
Show Answer
Water Displacement
Answer for 15 Points
12
3
cm
Back to Board
Water Displacement
A beaker was partially filled with water and the
water level was marked “I.” An object too
large for a graduated cylinder was completely
immersed in the water in the beaker and the
water rose to a higher level marked “II.” The
beaker was emptied and then refilled from a
graduated cylinder. It took 100 cm3 to reach
level “I” and 40 cm3 more to reach level “II.”
What was the volume of the object?
Show Answer
Water Displacement
Answer for 20 Points
40
3
cm
Back to Board
Water Displacement
Some water was put into
the graduated cylinder
shown, and the water
level stood as shown by
the dotted line. Then an
irregular solid was put
into the water, and the
level rose to the height
shown by the solid line.
What is the volume of
the solid, in cm3?
Show Answer
Water Displacement
Answer for 25 Points
15
3
cm
Back to Board
Operate a Balance
What is the first
step in operating a
balance?
Show Answer
Operate a Balance
Answer for 5 Points
Zero out the balance
Back to Board
Operate a Balance
Laura has a cube of modeling clay whose
mass she measures on a balance. She
reforms it successively in each of the
following shapes, finding the mass of the
clay after each reshaping; a sphere, a flat
disk, a hollow sphere, and a doughnut. In
which shape will the clay have the
greatest mass?
Show Answer
Operate a Balance
Answer for 10 Points
The mass is the same
for all shapes.
Back to Board
Operate a Balance
• What scale reading corresponds to the
position of the edge of the block shown
in the figure?
Show Answer
Operate a Balance
Answer for 15 Points
16.33
Back to Board
Operate a Balance
Two students were unable to zero a single-pan
balance regardless of how far they turned the zeroadjustment knob each way. Assuming that the
balance is undamaged, which of the following steps
would help them zero the balance successfully?
I. Check whether all the riders are in their zero
positions.
II. Check to make sure the pan is clean of debris.
III. Change the direction in which the balance is
facing.
IV. Be sure the balance is on a level surface
Show Answer
Operate a Balance
Answer for 20 Points
Steps I, II, IV
Back to Board
Operate a Balance
What is the difference
between mass and
Weight?
Show Answer
Operate a Balance
Answer for 25 Points
Mass is the amount of
matter; weight is the
effect of gravity’s force
on the mass
Back to Board
Sensitivity of a Balance
What are you
determining by finding
the sensitivity of a
balance?
Show Answer
Sensitivity of a Balance
Answer for 5 Points
The smallest amount of
mass that the balance
can record or register
Back to Board
Sensitivity of a Balance
• A large square of
graph paper has 10
small squares along
each edge, as
shown in the
drawing. The large
square has a mass
of 1.00 g. What is
the mass, in grams,
of a single small
square?
Show Answer
Sensitivity of a Balance
Answer for 10 Points
.01 g
Back to Board
Sensitivity of a Balance
List the steps to figure
out the sensitivity of a
balance.
Show Answer
Sensitivity of a Balance
Answer for 15 Points
Mass an object on the balance
and then add predetermine
small masses to the pan until a
response can be recorded. Then
add the small masses together
to find the sensitivity.
Back to Board
Sensitivity of a Balance
Using an Single-Pan Balance, a student measures the
mass of a penny three times, getting 2.470 g, 2.474 g,
and 2.472 g. He finds then that a piece of paper of
mass 0.008g placed on the pan causes the balance
pointer to move, and a piece of paper of mass 0.0016 g
causes the pointer to move twice as much. A piece of
paper of mass 0.004 g causes no movement of the
pointer. What is the sensitivity of the balance?
Show Answer
Sensitivity of a Balance
Answer for 20 Points
0.008 g
Back to Board
Sensitivity of a Balance
Number of Strips
Mass (g)
0
1
2
3
4
5
6
31.06
31.08
31.09
31.11
31.13
31.15
31.16
A pebble was placed on a balance and its mass was recorded. Six identical strips
of paper were added, one by one, and the combined mass also recorded. What
is the Mass of one strip?
More than 0.02 g
More than 0.02 g
Less than 0.02 g
Impossible to tell
Show Answer
Sensitivity of a Balance
Answer for 25 Points
Less than 0.02 g
Back to Board
Mass & Volume
• What is the
volume, in
cm3, of the
solid figure
shown?
Show Answer
Mass & Volume
Answer for 5 Points
102
3
cm
Back to Board
Mass & Volume
Student
Mass (g)
Katie
3.752
Sarah
3.755
Mitchell
3.752
Rachael
3.756
Ross
3.760
Five students used the same balance to measure
the mass of a small dish. The masses they
found are recorded on the table above. What is
the best way to report the mass of the dish?
Show Answer
Mass & Volume
Answer for 10 Points
3.755 g
Back to Board
Mass & Volume
What is the volume, in cm3, of the
rectangular block shown below?
Show Answer
Mass & Volume
Answer for 15 Points
24 cm3
Back to Board
Mass & Volume
Which statement below about volume is NOT
CORRECT?
a.
The volume of a solid that does not dissolve in water can be
found by the displacement of water.
b.
The volume of a rectangular box is measured in terms of unit
cubes.
c.
The volume of a sphere is measured in terms of unit cubes.
d.
Whenever substances are changed in some way, their total
volume is conserved.
Show Answer
Mass & Volume
Answer for 20 Points
d. Whenever substances
are changed in some way,
their total volume is
conserved.
Back to Board
Mass & Volume
If you weigh 110 lbs.
your mass would be
_________ Kg.
Show Answer
Mass & Volume
Answer for 25 Points
50 Kg
Back to Board
Authored by
Jeff Ertzberger - 2004
University of North Carolina at Wilmington
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