Effect of temperature of water on expansion of a balloon

The Fellowship of Science

Group members:

Iris Chau(3)

Candy Choi(6)

Macrina Lam(17)

Ruby Yuen(41)

Introduction This experiment is about

the relation between hot air and the expansion of a balloon. We found this from a Science Book, we thought this experiment is very interesting so we chose this as our experiment.

Hot air

Expansion of balloon

?

Research Question

How can the temperature of water affect the expansion of the balloon?

Hypothesis

As the temperature gets higher, the balloon will expand more!

Experiment

Factors to be changed• The temperature of the waterFactors to be kept constant• The volume of water • the type of balloonFactors to be measured• The circumference of the

balloon • The temperature of the water

ApparatusTransparent basin (1)

Thermometer (1)

Electrical heater(1)

Beaker(1)

Materials

Balloons (1-2)

Glass bottle (1)

Ruler (1)

Rope (1)

Procedure1. Get the materials and

apparatus needed2. Set up the apparatus and

materials as the picture on the next page

3. Boil the water with the electrical heater

4. Pour the water into the transparent basin

Setting

5. Wait for 1-2 minutes, and then measure the circumference of the balloon.

6. Record the data.7. Measure the circumfer

ence at different temperature, e.g. 80℃70℃60℃

The relation between the temperature and the circumference of the balloon

Temperature(℃ )

80 70 60 50 40

Trial 1:Circumference of the balloon (cm)

12.2 12 11.4 10.5 The balloon has fallen down

Trial 2:Circumference of the balloon (cm)

12.3 10.9 10.1 10 The balloon has fallen down

Average (cm) 12.25 11.45 10.75 10.25 The balloon has fallen down

Results(data)

Results(chart)

0

2

4

6

8

10

12

14

80 70 60 50 40

Average

Temperature(℃ )

Aver

agec

ircu,

fere

nce(

cm

)The relation between the temperature and the

circumference of the balloon

DiscussionData AnalysisAccording to the graph, the average circumference of the balloon decreases when the temperature gets lower, as the temperature is lower, the circumference is shorter.

Discussion

Errors～ 1. We used different bottle, balloon to do

the trial 1 and 2 so there maybe have some difference.

2. The one has to measure the circumference is not the same student

DiscussionImprovement～

measuring tape a rope

measure the circumference of the balloon

Conclusion

As the temperature gets higher, the expansion of the balloon is more obvious.

ReferenceName of the book

Author’s name

Name of the publisher

Year of publishing

The Way Science Works

Robin Kerrod and Dr. Sharon Ann Holgate

DK Ltd 2002

Special Thanks

•Ms Esther Wong

•Mr K Law

•Ms Q Kwok

•Ms S Wong

•Ms Mo