Before using the triple beam balance to measure the mass of your blocks in grams, watch this introductory video.
Mr. Considine's Science Scholars
Friday, January 6, 2017
Tuesday, January 3, 2017
Lab #5: Measurement – Mass, Volume and the exploration of Density
LAB #5 – Measurement: Mass, Volume, and the Exploration of Density
Introduction
Volume
is the amount of space occupied by matter  solid, liquid, or gas.
Volume is measured in
units: cm^{3 }for a solid, mL for a liquid.
Problem

A:
How can we find the volume of a rectangular block?

B:
How can we find the volume of an irregularly
shaped object?
Hypothesis:
Materials:
Various
sized blocks, irregular shaped objects, ruler, graduated cylinder
Procedure A
1) Use a metric ruler to measure the
dimensions of your rectangular objects; measure to the nearest tenth (0.1) cm.
2) Calculate the volume in cm^{3} of your rectangular object by multiplying the length (cm) times the width (cm) times the height (cm). V = L x W x H
3) Record your measurements in the data table.
2) Calculate the volume in cm^{3} of your rectangular object by multiplying the length (cm) times the width (cm) times the height (cm). V = L x W x H
3) Record your measurements in the data table.
Results
A
Data
Table A: Volume of rectangular objects
(cm^{3}) 

V
= L x W x H
cm^{3
}= (cm)(cm)(cm)
1. Fill the graduated cylinder to 50 mL and record this into your notebook. This is your initial volume.
2. Carefully drop the object in on an angle. The object will displace water (push water up to make way for the object) which will rise to make a new volume.
3. Subtract your initial volume from the new water level.
Results B
Final Volume à _____mL
 Initial Volume à _____mL
=Volume of irregularly shaped object: _____mL
Analysis B.1
Analysis B.2
Procedure B
Use a graduated cylinder to measure the volume of an irregular shaped solid. 1. Fill the graduated cylinder to 50 mL and record this into your notebook. This is your initial volume.
2. Carefully drop the object in on an angle. The object will displace water (push water up to make way for the object) which will rise to make a new volume.
3. Subtract your initial volume from the new water level.
Results B
Final Volume à _____mL
Final Volume à
_____mL
 Initial Volume à _____mL
=Volume of irregularly shaped object: _____mL
 Initial Volume à _____mL
=Volume of irregularly shaped object: _____mL
Analysis B.1
1) What is the maximum volume you can measure with this graduated cylinder?
2) What is the smallest volume you can measure with this graduated cylinder?
3) Determine the value of the minor grids on the cylinder. i.e. how many mL does each line equal?
4) Now, check to see if you’ve measured correctly using the Volume of sphere using equation:_____cm^{3}
Procedure C
The mass of an object is a measure of the number of atoms in it.
The basic unit of measurement for mass is the gram (g).
You are going to calculate the densities of the wood blocks using the equation, Density = Mass/Volume. You already have the volume of wood blocks A, B, C, D, and E in the data table for Results A. You will use a triple beam balance to find the mass of each block, and then use the equation to find their volumes. As always, make sure to include the proper units and round to the nearest tenth.
You are going to calculate the densities of the wood blocks using the equation, Density = Mass/Volume. You already have the volume of wood blocks A, B, C, D, and E in the data table for Results A. You will use a triple beam balance to find the mass of each block, and then use the equation to find their volumes. As always, make sure to include the proper units and round to the nearest tenth.
Results
C
Density
= Mass/Volume
Object

Mass
(g)

Volume
(cm^{3})

Density
( g/cm^{3} )

A


B


C


D


E

Units:
Mass =
grams = g
Volume
= cubic cm = cm^{3}
Density
= ___ hint: D=M/V
Analysis B.2
5) How can
you use a graduated cylinder to measure the volume of a liquid?
6) What
happens to the volume of the liquid when you drop an object into the graduated
cylinder? How can we use this to help us find the volume of the object?
7) If an
object dropped into the graduated cylinder pushes up the water mark from an
initial volume of 25 ml to a final volume of 51.5 ml, how many cm^{3 }is the object?
8) Compare
the two different methods of obtaining volume of a marble, how did you
do? How far off were your calculations?
9) Go back
to Lab #2 – Crazy Coasters
Mass of glass marble: _____
Volume of glass marble: _____
Density of glass marble: _____
++Include units++
Analysis A and C
1) Calculate: Combine the densities of blocks A, B, C, and D and find the average density for the wood. Show your work.
2) What is the maximum mass the triple beam balance can measure?
3) What is the minimum mass the triple beam balance can measure?
4) What are the units for the triple beam balance?
5) Why is it called a triple beam balance? What does each beam measure; think in numerical terms.
6) Why is it necessary to zero your triple beam balance before using it?
Analysis
D
1)
What was the density of water? Round to the nearest tenth and include units.
2)
Compare/Contrast your Results with another
group’s. How similar was the mass and
volume? How similar was the density?
3)
Density of water: _____g/mL
4)
Density of wood: _____g/cm^{3}
5)
Density of glass: _____ g/cm^{3}
6)
Rank the above in order from least dense to
most dense. Predict: If you were to drop
the glass and wood into a tub of water, what would happen to the solid objects?
7)
Sinking/Floating:
a.
If you have a solid with a density less
than 1.0 g/cm^{3} would it sink or float?
b.
If you have a liquid with a density less
than 1.0 g/cm^{3} would it sink or float?
c.
If you have a solid with a density more
than 1.0 g/cm^{3} would it sink or float?
d.
If you have a liquid with a density more than 1.0 g/cm^{3} would it sink or float?
Conclusion
What
was your problem?

Restate
your hypothesis. Was it right? wrong? why or why not?

What
did you learn in this lab?

What
did you like about this lab?

What
were some challenges you had to deal with?

What
could you do next with this problem? What other tests could you
perform?

Write
down any other additional thoughts, observations, inferences, etc.

Thursday, December 22, 2016
Science Fair Projects
The Science Fair is on February __, 2017
**SCIENCE FAIR PROJECT Topics NEED TO BE COMPLETED BY 1//17**
*The Confirmation Date is Friday, January 6, 2017. (i.e. You must have your topic approved by then or I will pick one for you!)
*Use the scientific method while performing your research*
1. Exhibit > either a display board or a powerpoint presentation (1/3)
2. Oral Presentation to the class (1/3)
3. Research Paper  1 page typed or 2 pages neatly handwritten, ~200250 words. (1/3)
Here are some helpful websites:
5. http://www.education.com/sciencefair/
6. http://www.sciencebob.com/sciencefair/ideas.php
http://nces.ed.gov/nceskids/createagraph/
 Make your own graph online website!!!
If you need any help, please come to room 509 or Library at lunch or after school.
Very Important Tips/Tricks/Hints
Very Important Tips/Tricks/Hints
1. Your visual Exhibit should NOT contain your written Research Paper; your Research Paper is separate from your Exhibit and should be handed in on its own.
2. What is your Independent Variable? Dependent Variable? Constants?
3. You must have proof that YOU did the research for your project. Have some type of visual evidence i.e. photographs, video clip.
3. You must have proof that YOU did the research for your project. Have some type of visual evidence i.e. photographs, video clip.
*** The Exhibit ***
*** The Research Paper ***
What does your report need?
• Name and Class
• Project Title
• Body Paragraphs
Your
research paper should include the following information:
1) Introduction
In this section, explain your problem or
question. Why did you choose this problem? Where did you get the
idea? Why did you do this project?
What was your purpose?
2) Hypothesis
In this section, state your
hypothesis. Why did you make this hypothesis? What observations did
you make that led you to this hypothesis? (Remember: Your hypothesis is “a best
guess based upon your observations.”)
3) Materials and Methods
In this section, please give a list
of your materials. You may simply
list your materials in a “bulleted
list.”
4) Procedure
Write the step by step process of what you did in the lab here
4) Procedure
Write the step by step process of what you did in the lab here
4) Results
In this section, explain what
happened in your experiment. Use charts, graphs, data tables, etc. On your graph, make sure to label the
following: title, xaxis, yaxis, and units. What is your Independent Variable? Dependent Variable? Constants?
5) Conclusion
What did you learn? Was
your hypothesis right or wrong? What could you do next with this
experiment? Is there another experiment
that could follow this one?”
6) Additional
Research
How is this science
related? What new information have you
gained/learned? How could this help you
in real life? Explain the overall significance of your science fair project and
how your experiment relates to the world. Where is the science in your project? Explain your results.
7)
Bibliography
List any books,
websites, magazines, journals or other sources you used for your research or
experimentation.
***Proofread the
entire research paper with a parent, editing content, grammar mistakes and
punctuation before you hand it in to your teacher.***
The Science Fair rubric can be found here:
The Science Fair rubric can be found here:
I.S. 220
Science Fair
Scoring Rubric
Project
Title/Number ________________________________________ Judge’s
Initial_______
1

3

5

score


Question
Hypothesis and Variables

Question/Problem is not clear Hypothesis/Prediction
is not present or doesn’t address the question at all
Variable(s) are not included

Question/Problem is somewhat clear
Hypothesis/Prediction somewhat addresses the question
Some variable(s) are included but are
not complete or are not clearly identified

Question/Problem is specific and very clear
and can be answered by doing an experiment
Hypothesis/Prediction addresses the
question very clearly
Independent (manipulated), Dependent
(responding) and Controlled variable(s) are included and are clearly
identified


Experimental Procedure

Materials list is not detailed and
complete and clear
Experimental procedure is not clear
Includes no repetitions

Materials list is somewhat detailed
and complete and clear
Experimental procedure is very clear Includes
only 2 repetitions

Materials list is very detailed and
complete and clear
Experimental procedure is very clear
Includes at least 3 repetitions


Data

Data is not clear
Poor or No use of photos/charts/graphs
to display data.

Data is somewhat clear
Good use of photos/charts/graphs to
display data

Data is very clear
Excellent use of photos/charts/graphs
to display data


Conclusions

Conclusions are not supported by the data.

Conclusions are not clearly
supported
by the data.

Conclusions are
clearly supported
by the data.


Display

Display is neither neat, creative, nor
organized
No attention to detail

Display is somewhat neat, creative and
organized
Minor attention to detail

Display is very neat, creative and
organized
Significant attention to detail


Written Document/Journals/Research
Paper

Report has a cover, some research/
some data

Report has a cover, table of content,
Research data, some experimental data

Report has a cover, table of content,
Research data, Experimental data,
bibliography


Level of Student Involvement

Display shows a
low amount or no involvement by the students in the
procedure.

Display shows a medium amount of involvement by the students in the procedure.

Display shows a
high amount of involvement by the students in the
procedure.


Creativity

Project shows a
low amount
of creativity.

Project shows a
medium amount of creativity.

Project shows a
High amount of creativity.

Total_____________
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