# Intensive Extensive Properties Worksheet - PowerPoint

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Do Now: 6 minutes
1.   Get out your “Analyzing a Graph…”
worksheet from yesterday.
2.   Find the poster your didn’t analyze.
3.   Finish the worksheet, and hand it in
on the front table.
4.   Sit down, and take out your
notebook. Copy the objective.
Smile, it’s Friday!
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Density of Pennies Lab
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Intensive vs. extensive properties

Intensiveproperty: a physical
property that does NOT depend on
how much of a substance you have.
Ex: temperature, velocity, melting
point
Extensive property: a property that
DOES depend on how much you have.
Ex: mass, length, volume
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Intensive or extensive?
I   weigh 130 pounds.
The    car is moving 50 miles per hour.
The length of a marathon is 24.6
miles.
The    density of water is 1.0 g/mL
Ice   melts at 0oC.
I   drank one liter of soda. (burp!)
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Density

A physical property of matter
mass(g)
density 
volume(mL /cm 3 )

The   mass per volume of a substance.
Units: g/mL   or g/cm3
1   mL = 1 cm3
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Calculate Density

Mass   = 10.0 g, volume = 20.0 mL
10.0   g, 5 cm3
Calculate the mass of a sample of
matter with a volume of 10.0 cm3 and
density of 2.0 g/cm3
Calculatethe volume of a rock with
mass 100.0 g and density 5.00 g/mL.
+ Homework
Week   6 Homework, #5-6
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The phenomenon

In1982, the density of pennies
changed.
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Determine, empirically, the  density of
pennies before and after 1982.
1. Write a materials list and procedure.
Include ALL your steps. Be thorough!
3. Record and organize data into a chart
and graphs. Describe your data in a
paragraph.
4. Analyze your data in a paragraph.
5. Make a conclusion summarizing your
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Some details
How can you determine the volume of
a penny?
Displacement

Calculatethe density of 2, 3, …10 pre-
1982 pennies, and 2, 3, …10 post-1982
pennies. Make a neat table and
graph.
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An example of a good table.
Table 1: Mass, volume and density of pre-1982 pennies
Number of     Mass (g)      Volume (mL)    Density
pennies                                    (g/mL)
2
3
4
5
6
7
8
9
10
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Things to write in your notebook:

 An   excellent materials list and procedure
 Complete  data tables (title, headings, units,
calculations, NEATLY!)
 Complete  graphs: mass vs. volume and
EITHER mass vs. density or volume vs.
density, with title, axis labels and units
A   written description of your data.
A   written analysis of your data
A   conclusion based on guiding questions.
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To   write a lab report.
Draft (neatly hand-written or
First
typed) due:
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density intensive or extensive?
So, is
How do you know? Discuss your
graph, and what a graph of the other
type might look like.
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By the end of class…
Materialslist and procedure (incl. how to
make calculations!)
Data   table for pre- and post-1982 pennies
2graphs: mass vs. volume AND either
Mass vs. density OR volume vs. density
With a sentence describing each graph.

You can start an analysis and conclusion like
we practiced yesterday.
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Homework
Week   6 Homework: #5-6
2graphs: mass vs. volume AND either
Mass vs. density OR volume vs.
density
With a sentence describing each
graph.
You can start an analysis and
conclusion like we practiced
yesterday.
Mass vs. Volume of Pre- and Post-1982 Pennies

Pre-1982 Pennies   Post-1982 Pennies
4
3.5
3
Volume (mL)

2.5
2
1.5
1
0.5
0
0      5        10       15      20       25      30   35
Mass (g)
Mass vs. Density of Pre- and Post-1982 Pennies
Pre-1982 Pennies      Post-1982 Pennies
10.0
9.0
8.0
7.0
Density (g/mL)

6.0
5.0
4.0
3.0
2.0
1.0
0.0
0      5         10       15         20        25    30   35
Mass (g)
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Fix   your graphs. Draw a best-fit line.
Write  a one-paragraph analysis for
each graph. Describe BOTH lines
for each graph.
Trend
Shape of line
Outliers: points that are way off the
line.
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Title

Your   lab report should be titled with a
Itshould be relevant to the lab and
should not just be the same as the title
of a handout your teacher gave you.
Do not have it on a separate title
page.
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Background Information

Explain any important concepts that
are central to understanding the
experiment.
In paragraph form, define any
scientific terms necessary for
understanding the lab.
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Objective (NO hypothesis)

Explain what the purpose of the
experiment or what goals you have in
completing the lab. What do you
hope to accomplish?
(No   hypothesis)
IV: number    of pennies
DV: density
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Write a Lab Report

(incl. name, data, partner’s
Title
names)
Objective   (no hypothesis)
Background    info (from notes, etc.)
DUE     TOMORROW
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Procedure

 Fora lab where you have designed the
procedure, include a detailed and
complete account of every single step
you completed during the lab, including
how to make calculations. Be sure to
include proper names for pieces of
equipment!
you have followed a procedure given
 If
by your teacher, write a summary of
what you did. Do not rewrite the given
procedure word for word.
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Data and Results

 Includeany charts, graphs, tables,
technical drawings, observations, or
diagrams in this section. Include a one
sentence caption for each.
 Datashould be presented neatly, and
with the use of computer software when
possible.
any calculations were necessary
 If
during this lab, include them here.
 DO   NOT explain the data.
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Analysis

Describe  any patterns or trends in the
data. Point out any relevant
characteristics and comparisons that
you see. Do not attempt to explain
them, simply note them.
Note the existence of any data that
does not seem to fit the overall
patterns/trends.
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Conclusions
 Drawconclusions from the patterns and
observations you noted in the analysis section.
Explain why the patterns you saw occurred.
 Was the experiment successful at completing
the objectives above? Explain why or why not.
on your hypothesis. Was it correct?
 Reflect
Why or why not?
 Wasthere any significant error in your
experiment? Propose some possible sources of
error and explain how they might be improved.
 Answerquestions (4) in lab handout in
paragraph form.
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On a separate sheet of paper…
Write    the first draft of your lab report.
You may listen to music as long as I
can’t hear it.
Label    each section.
Be  careful to include EVERY part
listed in your lab report guide.
First   draft due: next Thursday, Oct. 22

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