TOPIC: Measurement
Aim: How do we measure volume?
Do Now:
1. Take out Scientific Method # 4 ISA.
2. Copy the topic and aim into your class
notes.
3. Identify the SI unit for length.
HW: Finish Scientific Method
Worksheet from yesterday.
Scientific Method Practice #4 ISA
Smithers thinks that a special juice will increase
the productivity of workers. He creates two
groups of 50 workers each and assigns each
group the same tasks (in this case, they're
supposed to staple a set of papers). Group A is
given the special juice to drink while they work.
Group B is not given the special juice. After an
hour, Smithers counts how many stacks of
papers each group has made.
0 cm
1
2
3
4
What is the length of the object in
millimeters? Centimeters to the
nearest tenth?
19mm
1.9cm
0 cm
1
2
3
4
What is the length of the object in
millimeters? Centimeters to the
nearest tenth?
29mm
2.9cm
0 cm
1
2
3
4
What is the length of the object in
millimeters? Centimeters to the
nearest tenth?
19mm
1.9cm
0
10
20
60
65
70
CORRECT!!!
No consistent interval.
75
80
85
90
1. Measure the length of the pencil in cm
to the nearest tenth. 7.5cm
2. Measure the length of the pencil in mm.
75mm
Volume
• The amount of SPACE an
object takes up
Did you know…
The basking shark and the white whale are the
world’s largest sharks with the largest volumes.
They are also the least dangerous sharks.
Basking Shark
White Whale
Volume
• The amount of SPACE an
object takes up
• SI UNITS =
–Liquid: mL or L
–Solid: cm3
• 1 mL = 1 cm3
How is volume measured?
How is volume measured?
1. Regular Solid:
V = L x W x H
• Ex:
L =2 cm, W=1 cm, H=1 cm
V =2cm x 1cm x 1cm
3
V = 2 cm
•Example: V = ?
•V = L x W x H
2cm x 3cm x 5cm
3
V = 30 cm
2. Liquid: graduated cylinder
(mL)
TOPIC: Measurement
Aim: How do we measure volume?
Do Now:
1. Take out yesterday's HW ditto.
2. Take out your volume notes.
HW: Measuring Volume Worksheet
#’s 1 – 3 (Back of length ditto)
10.3cm
9.7cm
11.3cm
12.0cm 13.0cm
12.5cm
14.0cm
13.3cm 14.4cm
Number
of
bacteria
in a
sample
Correct or Incorrect? Support your answer.
INCORRECT!!!
1. No consistent interval on the Y-axis.
2. The # of boxes skipped between each # on
the X-axis is not consistent.
Independent
variable?
Day
Number
of
bacteria
in a
sample
Dependent
variable?
Number of
bacteria in a
sample
State the relationship between the days
and the number of bacteria in a sample.
As the days increase, the number of
bacteria in the sample increases.
Let’s review…
1. Describe volume. How do we measure
the volume of a regular solid?
2. Identify the units that are used to
measure the volume of a regular solid.
3. How do we measure the volume of a
liquid?
4. Identify the units that are used to
measure the volume of a liquid.
V = 8.6mL
V = 20.0mL
V =73 mL
V = 18 mL
5.5 mL
26 mL
23.5 mL
http://www.youtube.com/watch?v=3ZynLbQrs24
3.Irregular solid:
• Displacement
• V with object - V w/o object
V = 9 – 7= 2
V = 2 mL
V1 = 7 mL
V2= 9 mL
260mL – 200mL
= 60mL
V1 = 200 mL
V2 = 260 mL
Let’s summarize…
1.
2.
3.
4.
Describe what is measured when you are
measuring volume.
Identify the instrument used to measure volume of
a liquid.
Identify the instrument used to measure volume a
regular solid.
What are the units used when measuring the
volume of a liquid? Of a solid?
Let’s summarize…
1.
2.
3.
Explain how the volume of a certain amount of
liquid is measured.
Explain how the volume of a regular solid is
determined.
Explain how displacement is used to measure the
volume of an irregular solid
V =53 mL
1. Identify the name
of this method used
to find the volume of
a ball.
DISPLACEMENT
2. Determine the
volume of the ball.
25mL
V = 40mL
V = 65mL
65mL – 40mL = 25mL
Determine the volume.
L x W x H
10cm x 5cm x 3cm
= 150cm3
Correct or incorrect?
INCORRECT!!!
On the Y-axis, the # of boxes skipped between
each number is inconsistent.
Independent
variable?
Day
Dependent
variable?
Concentration
of estrogen
State the relationship between the days and
the concentration of estrogen in a sample.
As the days increase, the concentration of
estrogen in the sample increases, decreases
and increases .
Correct or Incorrect? Support your answer.
CORRECT!!!
Identify the
volume of the
liquid.
76mL
Identify the
volume of the
liquid.
21.5mL
Identify the length of the comb
in cm to the nearest tenth.
10.0cm
Identify the length of the nail in
cm to the nearest tenth.
5.1cm
Identify the length of the eraser
in cm to the nearest tenth.
3.9cm
Identify the length of the crayon
in cm to the nearest tenth.
7.1cm
Identify the length of the bar in
cm to the nearest tenth.
2.3cm
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