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 TOPIC DEFENSE: What materials could prevent heat loss?

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.

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. Why Choose These Types Of Cloth?How Did We Choose Them?

Review of Related Literature

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). Heat Energy

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. 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. Usage

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

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

- 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 AND HYPOTHESIS

Which of the 3 materials (silk, cotton and polyester) is the best insulator of heat? Problem

Polyester is the best insulator out of the 3 materials because of its complex ingredients. Hypothesis

Experimental Design

- 3 bottles (500 mL of the same kind) - 3 thermometers (same brands) - timer/stopwatch - a pitcher - hot water (same temperature) - silk - cotton - polyester Materials

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 Procedure

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 Variables

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.

1. Granyard Hill Farm (2010) Cotton Facts Retrieved: Nov. 8, 2010 from: http://granyardhillfarm.com/barn_news/teaching-resources/cottonfacts/ 2. Geno, Jezek (2006) What is Polyester? Retrieved: Nov. 8, 2010 from: http:// www. whatispolyester.com/ 3. Silkroad Foundation(1997) History of Silk Retrievd: Nov. 8, 2010 from: http://www.silkroad.com/artl/silkhistory.shtml 4. (n.d.) What Is Silk? Retrieved: Nov. 9, 2010 from: http://www.wisegeek.com/what-is-silk.htm Bibliography :

(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, 2010 from: http://www.kids_science_experiants.com/heatconductosandinsulators.html

TOPIC DEFENSE: What materials could prevent heat loss?