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Butter Stick

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					Butter Stick
r3d05:
Carry Chan(2)     Jessica Li(25)
Tina Chan(4)      Kitty Wan(34)
Tiffany Cheung(7) Jessica Wan (35)
Carol Lam(18)
              Introduction

 Use the knife to spread the butter on the
  bread because it is too hard to melt.
 Knife is a dangerous utensil to children.
 They would play with it and may hurt
  themselves
 Would like to produce a butter stick to
  improve our daily life.
 Butter stick can reduce the danger caused by
  using the knife to spread the butter.
              Objectives

Produce a gadget in reducing the danger
 caused by using the knife to spread the
 butter
            Methodology

Distribute 50 questionnaires to the
 housewives for their opinions
Make improvement on our butter stick
  Production of the Butter Stick

Boil the butter first.
Then, pour some boiled butter into the
 container.
After that, put the butter stick in the
 freezer for 15 minutes.
After 15 minutes, take the butter stick
 from the freezer and spread it on the
 bread.
                Scientific Theory
 Adhesive force
 Forces of attraction between a liquid and another surface.
 Butter is poured to the container, the adhesive of the butter
  penetrates into the small gaps on the container hardens
  and does not move any more inside the gap
 Chemicals bonds between the butter particles and the
  container particles make them stick together butter can go
  up and down
 Particles
 Particles in the butter move very quickly as the temperature
  increases  butter melts
 Particles in the butter slow down when we put the stick into
  the freezer butter becomes solid
   The Effectiveness of the Butter
                Stick
 Spread the butter on the bread by using the
  butter stick after 1 hour every time
 Can be used to spread the butter on 15 pieces
  of the Life Bread
 Target is children, so we design to make the
  butter stick a bit smaller
 Give the butter stick to 30 children to try to
  use it
 Think that it is so convenient and they feel
  curious on how we can make it
                                Result
 43 housewives out of 50 prefer         Is the butter stick safe to your children?
  butter stick instead of ordinary
  butter which is in boxes even though
  the price may be slightly higher.        disagree
                                             26%
 Butter stick is more convenient and
  safe to us.
 One of them also said that with the                                       agree
  butter stick, her son can prepare                                          74%

  the breakfast on his own
 7 housewives said that they prefer                    agree   disagree

  ordinary butter which is in boxes
  because it is cheaper.                 Is the butter stick a modern invention?
 74% housewives think it is safe to
  use.                                            disagree
 90% housewives think that it is                   10%

  modern invention and convenient to
  use.
                                                                    agree
                                                                     90%



                                                       agree    disagree
              Discussion

Our knowledge is limited.
Room for improvement of our butter
 stick.
Butter will expand in the freezing
 process, we will have to control the
 volume of the boiled butter that we
 pour into the stick before putting the
 stick in the freezer.
Fewer errors
              Conclusion

Good invention to children.
Children can use the butter stick.
Eliminate the danger caused by using
 the knife
More convenient than using the knife.
Not only a modern invention, but it is
 also convenient and safe to use.
     Acknowledgement

    Mr William Lam
           &
    Mrs Sudhaman
for their great support
The End

				
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