Topic defence: what material best prevent heat lost?

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