TOPIC DEFENSE: What materials could

prevent heat loss? * Matthew Ang* Sean Braganza* Lenard Cheng* Laurence Chu

* Ethan Cu Castiglione 1 * Brian De Guzman* Paul Gue* Dwight Ong* Marc Ong* Ryan Tan* Matthew Yap

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

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 Cloth?How Did We Choose Them?

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.

Review of Related Literature

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).

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.

Usage

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.

Polyester

-- made from polymers-- human-made-- not easily affected by molds and by other biological substaces- very strong, easily dried, and stays in shape

Silk

- made from silkworms- first made here, in China- known for its strength, softness, and insulating properties- expensive compared to the others

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

PROBLEM AND

HYPOTHESIS

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 experiment

Controlled: - 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 :1. Granyard Hill Farm (2010)Cotton FactsRetrieved: Nov. 8, 2010from: http://granyardhillfarm.com/barn_news/teaching-resources/cottonfacts/

2. Geno, Jezek (2006)What is Polyester?Retrieved: Nov. 8, 2010from: http:// www. whatispolyester.com/

3. Silkroad Foundation(1997)History of SilkRetrievd: Nov. 8, 2010from: http://www.silkroad.com/artl/silkhistory.shtml

4. (n.d.)What Is Silk?Retrieved: Nov. 9, 2010from: http://www.wisegeek.com/what-is-silk.htm

(n.d.) What Is Polyester? Retrieved Nov. 9, 2010 from: http://www.wisegeek.com/what-is-polyester.htm

(n.d.) What Is Cotton? Retrieved on Nov. 9, 2010 from: http://www.wisegeek.com/what-is-Cotton.htm

Mellendrof, Ken (2004, April 1) Heat Movementand Insulators Retrieved on Nov. 8, 2010 from: htt://www.newton.dg.an/.gov/askasci/phy00/phy0078..htm

Kurtus, Ron (2006, April 29) Thermal Insulation Prevents Heat From Escaping retrieved on Nov. 8, 2010from: http://www.kids_science_experiants.com/heatconductosandinsulators.html