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Topic defence: what material best prevent heat lost?. Castiglione 1. Mathew Ang Sean Braganza Lenard Cheng Lawrence Chu Ethan Cu Brian De Guzman. Paul Gue Dwight Ong Marc Ong Ryan Tan Mathew Yap. Significance Of The Study. - guides us on how we can prevent heat loss efficiently - PowerPoint PPT Presentation
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Mathew AngSean BraganzaLenard ChengLawrence Chu
Ethan Cu Brian De Guzman
Paul GueDwight OngMarc OngRyan Tan
Mathew Yap
TOPIC DEFENCE: WHAT MATERIAL BEST PREVENT HEAT LOST?
Castiglione 1
Significance Of The
Study
- guides us on how we can prevent heat loss efficiently
- to know which type of clothing we should use in times of cold and hot
seasons. - to discover if the prices of these
types of cloth are worth the price in terms of insulation strength
Why Cloths?
Cloths are environmental friendly compared to other insulative goods like leather and animal skin. They are environmental friendly because compared
to using metals, cloths decompose faster. Things that decompose in a long period of time stays here,
on Earth, and takes up the space for how many years. It contributes to the destruction of our
environment. Compared to using a metal canister/thermos, this is a lot easier to construct.
Why Choose These Types Of Cloths?
We chose the three types of cloth; silk, cotton and polyester. But
before choosing them, we thought of the types of cloth that have an impact in our society. First, silk
and cotton, as we all know, are very common to all of us. Silk is worn
often as gowns, while the high and the low class all wear cotton.
Therefore, by experimenting using them, a lot of people will benefit
from it. But why polyester? Polyester is worn, but not as often
as the others. We chose this because the polyester's properties
are different compared to the others.
Things That You Should Know.
What Is Heat
Energy?
Heat energy is contained in molecules as
vibrations . If there is more vibration, more heat
is produced. In some materials, heat can be
easily transferred (conductors), while in
other materials, heat can't pass through easily
(insulators).
What Are Insulators?
Not all materials can easily allow heat to pass through, and these are
called insulators. Materials with
molecules far away from each other are better insulators because the vibration can't easily
reach other molecules.
Where Do We Use
Insulators?
We use insulation so that we can make our own lives easier and safer. It makes our lives easier
because it lessens the cold entering our body. We can also use insulators when we want to keep materials warm for a long period of time. For example, we
wear jackets so that we can keep ourselves warm. We can also use insulation as cooking materials. An example can be
the handles of different pans so that we won't get burned.
Types Of Cloths
Polyester
- made from polymers
- human-made- not easily affected
by mold and by other biological
substances- very strong, easily dried, and stays in
shape
Polyester
Silk
- made from silkworms
- first made here, in China
- known for its strength, softness,
and insulating properties- expensive
compared to the others
Silk
Cotton
- one of the oldest types of cloth
- produced from farming and
harvesting cotton plants
- cheap compared to the other types
of cloth- worn by the
higher and the lower class
Cotton
Problem
Which of the 3 materials (silk,
cotton and polyester) is the best insulator of
heat?
Hypothesis
Polyester is the best insulator out of the 3 materials
because of its complex
ingredients.
Experimental Design
Materials
- 3 bottles (500 mL of the same kind)
- 3 thermometers (same brands)
- timer/stopwatch - a pitcher
- hot water (same temperature)
- silk- cotton
- polyester
Procedure
STEP 1: Fill three 500ml bottles to the brim with hot water. (same
temperature)STEP 2: Insert the 3 thermometers in each of the bottles, to check if the temperatures are the same.
( remove them if your already sure of their temperature)
Step 3: Wrap each type of cloth (cotton, silk, and polyester) outside of each bottle. Wrap them once. STEP 4: Check the temperature of the set-up after an hour* and see
which water temperature decreased the most/least.
*use the stopwatch to time the experiment
Variables
Independent Variable: the different types of cloth
Dependent Variable: temperature of the water
after the experimentControlled Variable:
- initial temperature of the water
- kind of bottle- room temperature/location
- time taken for the experiment
- amount of water- the number of coil of these
types of cloth to their assigned bottle
Proposed Data
Presentation
A bar graph shall be used in this experiment.
With it, the temperatures of these 3
types of cloth will be seen obviously as which type of cloth is the best and worst insulators.
Bibliography
Kurtus, Ron (2006, April 29) Thermal Insulation Prevents Heat From Escaping retrieved on Nov. 8, 2010
from: http://www.kids_science_experiants.com/heatconductosandinsulat
ors.html
Mellendrof, Ken (2004, April 1) Heat Movementand Insulators Retrieved on Nov. 8, 2010 from:
htt://www.newton.dg.an/.gov/askasci/phy00/phy0078.htm
Geno, Jezek (2006)What is Polyester?
Retrieved: Nov. 8, 2010from: http:// www. whatispolyester.com/
Granyard Hill Farm (2010)Cotton Facts
Retrieved: Nov. 8, 2010from:
http://granyardhillfarm.com/barn_news/teaching-resources/cottonfacts/
Silkroad Foundation(1997)History of Silk
Retrieved: Nov. 8, 2010from:
http://ww.silkroad.com/artl/silkhistory.html
(n.d.) What Is Cotton? Retrieved on Nov. 9, 2010 from: http://www.wisegeek.com/what-is-Cotton.htm
(n.d.) What Is Polyester? Retrieved Nov. 9, 2010 from: http://www.wisegeek.com/what-is-polyester.htm
(n.d.) What Is Silk?Retrieved: Nov. 9, 2010
from: http://www.wisegeek.com/what-is-silk.htm