Conclusion

1) As Clarissa was told to apply as much force as she could to the blu-tac on the wall for 10s, she might have gotten tired after one round of pushing the blu-tac against the wall. In order for it to be a fair test, we decided no to switch the person who was pushing the blu-tac. So, perhaps after she pushed the blu-tac against the ceramic wall during the 2nd round, the effort she applied to the other surfaces might not have had been equivalent to that of the ceramic wall during the 2nd and 3rd rounds. Thus, the test might not have had been quite reliable at this point.

2) For some of the surfaces such as the tiled wall, there was a little curb jutting out from the bottom of the wall. Hence, our measurement of one metre from the ground might not have had been as accurate here.

3) When we cleaned the surfaces, some of the fibre from the toilet paper got stuck onto the surfaces, causing less friction between them and the Blu-tac. However, as this was done to all the surfaces, we assumed that it was far

4) When Clarissa pushed the blu-tac against the wall, the force would have caused the blu-tac to change its shape. And as we could not measure the exact amount of force to be applied on the blu-tac, the shape of each blu-tac was different. We could not help this from happening although it does contribute to the accuracy of our results.

Updated Procedure

1) Blu-tac was cut into 12 pieces measuring 0.5g

2) The Blue-tac was them moulded into squares measuring 1cm x 1cm x 0.2cm

3) 12 strands of string, each measuring 32cm was cut from the roll of string

4) The pieces of Blu-tac were then measured again and marked at their midpoint of 0.5cm

5) Each piece of string was stuck onto a slab of blu-tac, exactly in its middle.

6) the strands of string were then mesured again( now measuring 31cm each) and were marked at the 30cm spot

7) Strings were tied onto the weight holder, their knots resting at the marked spot of 30 cm. (Now, each piece of string measures exactly 30cm)

8) A weight of 50g was fitted onto the weight holder

9) The blu-tac (complete with the string and weight holder) was brought to the first venue of the experiment-the tile wall

10) Using the one metre ruler, we measured and positioned the Blu-tac one metre away from the ground

11) Using some wet tissue, we wiped the area around the one metre mark. Following that, we used some toilet paper to wipe it dry. Thus make it grease-free

12) Using as much as force as she could, Clarissa pushed the Blu-tac while Deborah started the stopwatch as soon as Clarissa started exerting force on the Blu-tac

13) This was done for ten seconds and soon as Clarissa stopped pressing the Blu-tac, Deborah, holding the two stopwatch, pressed the start button on the other stopwatch to calculate the time taken for the Blu-tac to drop.

14) The timing was then recorded

15) Step 9-13 were then repeated for the three other surfaces-the tile wall, lift door and the glass door

16) Process was repeated three times (three rounds)

IMPORTANT!!!ATTENTION NEEDED@ONCE!!!

Umm... Guys? WE really need to do ALOT of touching up on our Science Project. I reckon that it has been a long time since any of us did anything and we've probably forgotten about this altogether. WE haven't even done the form that We were supposed to fill in on the e-learn portal properly.Remember the one which WE did at the last minute?We wrote it out instead of typing it. Ms Phua wasn't too happy about it. WE are the only group that submitted it handwritten. I really want all of us to do this project well.

Please,

can each of you all try to go to e-learn whenever you are free and try to do up your own piece of the 2010 Report Template?THIS IS A MUST!

I'll give you the data soon. Need to go find it...

Meeting for Presentation

Hey guys:) we really have to meet up to discuss the presentation details.. So text each other to see when we are all free.. :) ok, thanks guys:)

I reckon that it would be rather difficult to present our findings in a bar chart, because there are those milliseconds that we have to record down too.

WE can't possibly go and write down all those minute details.

Or should WE just roughly gauge and round the timings up to the nearest second?

What do you all think?

Videos/Picture

Ms. Phua recommended that it would be better when we present we have videos and pictures... More exciting...
:)

The Presentation Rubric

Communication
- Visual contact
- Confidence
- Loudness


Explanation
- Methods of experiment
- Conclusion
- Point out difficulties faced

Data Presentation
- Appropriate tables, charts, graphs
- Visually appealing

Group Effort
-Every member presented and answered equally
- Each member knows what the other members are doing

Questions
- Able to answer questions posed with clear explanations

Engaging the Audience
- Presentation is enthusiastic
- Presenter demonstrates knowledge at expert-level in this field
- Presentation is conversational, rather than memorized.

Contents We Need to Include (Cont'd)

1:We must be able to understand our question, conclude on our research, summarize the contents.

2: Must be able to state the purpose of the topic we chose, state the question clearlyn and have a specific meaning, and the expected result based on current knowledge.

3: State what we do to answer the project question, and also be able to state the data we use and why is it able to help in our resaerch. The time and place must be stated too.

4: Write observations clearly, must present in a graph, chart or table, must put units and the correct hypothesis.

5: Know our weakness and strength of how we approach and result, and how to improve the way we do our project.

6: Conclude how we have the result, and need to reason how we reached our final result. in the conclusion, have to state 5 major references.

Contents We Need to Include

We need:
-a conclusion
-background infomation on the title we chose
-the research method
-data summary and analysis
-summary of our project.

I will upload a better view of what is needed later.

Updated Proposal Form (4/19/2010)

Project Title:
how do the difference insurfaces affect the adhesion of blu-tac?

Problem Question:
To investigate how the different types of surfaces of walls will affect the time that the blu-tac remains on it.

Hypothesis:
Rougher surfaces enable the blu-tac to remanin on thewall for a longer period of time

Web-Address (URL) of Project Blog
www.nuclearacid.blogspot.com

Apparatus and Materials Needed:
-3packs of blu-tac
-measuring tape
-weights (From Science Laboratory)
-Calander/Stopwatch
-Electronice Balance
-String (Yarn)

Surfaces
1) Window pane (function hall, smooth[glass])
2) Dormitory Cupboard (smooth[filed wood])
3) Exercise Corner at track (Wood[coarse])
4) Dormitory wall (cement[neutral])

Experimental Procedure Setup:
1) Take some blu-tac amd weogj ot pm am electronic balance
2) Measure it and make sure it is 1cm long on each side
3) Hang the weight onto the blu-tac with a 15cm string
4) Press the weight and blu-tac together
5) Push the blu-tac, with the weight hanging from the blu-tac on the string, against the wall for 5 seconds
6) Release pressure
7) Record the time it takes for the blu-tac to fall (hours and days)
8) Record findings in table

Independent Variable:
The different types of surfaces

Dependent Variable:
The time taken for the blu-tac to fall off the different surfaces

Controlled Variable:
-height of blu-tac on the wall
-orientation of blu-tac on wall
-weight of the load
-length of the string
-length of the blu-tac
-weight of the blu-tac
-width of the blu-tac

Apparatus Check List

Blu-tac (Jo already bought it..)
Weights (Science Laboratory)
Surfaces (Difference areas of the school)

Surfaces to be tested on

After some contemplation,WE decided that WE should carry out the experiment on these surfaces:

1.Glass panel of Function Hall(smooth)
2. Wood of Excercise corner at the track(Rough)
3.Wall outside the dormitories(neutral)
4.Door of dormitories(neutral)

Plotting of table

How should WE plan our table? Do you want it to be put in the form of a bar chart(vertical or horizontal) or a table?A bar chart will need more effort though... however it shows the distinct difference between the Independent and Dependent variables.Thus it provides quick insights on the period(length of time) of the adhesion of blu-tac.(Quoted from Miss Phua during lessons)

Experiment

May i know who are going overseas during the June holidays so that we can plan for the experiment to be carried out.

Please take note that we have to complete the experimant on the 14 June.thanks.

Josephine Yeh- Singapore 28 May~ Taiwan 13 June

Experimental Procedure Setup

1) Take some blu-tac and weigh it on an electronic weighing scale
2) Measure it and make sure the blu-tac weighs 5 grams and 1cm(width) by 1cm(length)
3) Stick the 1.5kg weight on the blu-tac
4) Let of the 1.5kg weight
5) Measure how long the blu-tac stays on
6) Measure how fast the blu-tac with the 1.5kg weight falls
7) Repeat steps 1-6 three more times for each surface to increase the accuracy of the results
8) Repeat steps 1-7 for all four surfaces

Apparatus and Materials Needed

-3 packs of blu-tac-measuring tape
-weights (from science laboratory)
-Stopwatch
-electronic weighing machine

Hypothesis

Rougher surfaces enable the blu-tac to remain on the wall for a longer period of time.

Effect of surfaces of wall on the blu-tac

WE felt that the rougher surfaces would allow the blu-tac to stay on for a longer time as they cause more friction.

Problem Question

To investigate how the different types of surfaces of walls will affect the period of time that the blu-tac remains on it.

Project Title

How does the difference in surfaces affect the adhesion of blu-tac?

Ensurance of fair test

We will be using a blu-tac weighing 5 grams and measuring 1cm x 1cm so that it will be a fair test during all the experiments.

We must use new blu-tacs every time we repeat the experiment to ensure its accuracy.

The way the blu-tac is positioned will also be one of the factors concerning the time taken for the blu-tac to fall.

#1 Proposal Form Tuesday, April 13

Project title:

How do the differences in surfaces affect the adhension of the blu-tac?

Problem question:

To investigate how the differences in surfaces of walls affect the time taken for the blu-tac to fall.

Hypothesis:

Rougher surfaces allow the blu-tac to stay on for a longer period of time than smooth surfaces.

Web address(Url) of project blog:

http://www.nuclearacid.blogspot.com/

Apparatus and materials needed:

1. 2 packs of blu-tac
2. calendar
3. measuring tape
4. weights from the science laboratory
5. weighing machine from the science laboratory

Experimental procedure setup:

1. take 5 grams of blu-tac, with the width of 1cm and the length of 1cm
2. stick the blu-tac with a weight of 2 kilograms on the wall
3. push the weight for 5 seconds against the wall then let go
4. press the start button of the stopwatch once we let the weight go and start timing
5. press the stop button when the blu-tac and the weight drop
6. record down the time taken and the surface texture of the wall on a table
7. repeat step 1-6 on different wall surfaces
8. telly the timing taken for the blu-tac to drop, distance/height where it was placed on the wall and the wall surface

Independent variable:

Surface on which blu-tac is stick onto

Dependent variable:

Blu-tac adhension

Controlled variables (constant):

1. weight of 2kg weights
2. height of the weight from the wall to the ground
3. weight of the blu-tac
4. size and shape of blu-tac
5. the position of the blu-tac sticks on the weight

If the blu-tac falls during the night, how would we know when or which day it fell?

I suggest that we choose a heavier weight from the science lab and attatch it to the blu-tac,ensuring that it would drop within a day,and thus making it more convenient and accurate for us to measure the time taken for the blu-tac to fall off the wall .

But if it is like this, then wouldn't we need a stopwatch instead of a calender to calculate the time taken?

Proposal Form

Project Title:
How do the difference in surfaces affect the adhesion of blu-tac?

Problem Question:
To investigate how the different types of surfaces of walls will affect the period of time that the blu-tac remains on it.

Hypothesis:
Rougher surfaces enable the blu-tac to remain on the wall for a longer period of time.

Web-Address (URL) of Project Blog:
http://nuclearacid.blogspot.com/

Apparatus and Materials Needed:
-3 packs of blu-tac
-measuring tape
-weights (from science laboratory)
-Calender/stopwatch
-electronic weighing machine

Experimental Procedure Setup:
1) Take some blu-tac and weigh it on an electronic weighing scale
2) Measure it and make sure the blu-tac weighs 5 grams and 1cm(width) by 1cm(length)
3) Stick the 1.5kg weight on the blu-tac
4) Let of the 1.5kg weight
5) Measure how long the blu-tac stays on
6) Measure how fast the blu-tac with the 1.5kg weight falls
7)

Independent Variable:
-the 4 different surfaces

Dependent Variable:
-the blu-tac

Controlled Variables (Constants):
-weight of the blu-tac
-size of blu-tac
-posititon of the blu-tac on the surface

How do the differences in surfaces of walls affect the period of time taken for the blu-tac to fall?

WE decided to use the following surfaces:
-The memo board in the boarding in our rooms(rough)
-a window pane(smooth),and
-the wall outside our room doors(neutral)

These are the independent variables.

Hypothesis:The rougher the surface of the wall, the longer time it takes for the blu-tac to fall.

WE think that the blu-tac would take more than a day to fall, so we decided to use a calender as a so-called 'time-taker' instead of a stopwatch.WE will be recording all our findings in a table.