Diocesan Preparatory School

1
Diocesan Preparatory School
Natural Science Exploration Award 2005
Technology
Tradition
VS

• ByAdrian Lo
• Tang Pok Tin
• Peter Lo
• Christopher Yuk

2
Is Technology really

BETTER ?
pollution?
speed?
?
taste?
usage?
3

• From our surveys, we found that

• Many People are Biased.

• Classic BBQ is Just Better!

4
We conducted a two-part experiment.

• Part 1. We barbecued some sausages using the
  ELECTRIC barbecue Pit.

• We asked ten people to taste two samples, and
  tell which came from the classic barbecue pit,
  and which came from the electric barbecue pit.

5
Results
60 of the interviewed thought they were
different!
60
40
6
We conducted a two-part experiment.

• Part 2. We barbecued some sausages. This time,
  we really barbecued them with both the classic
  Barbecue pit and the electric barbecue pit.We
  asked some people to tell which of them came from
  the classic barbecue pit, and which came from the
  electric barbecue pit.

7
Results
67 of the interviewed answered wrongly!
67
33
8

• They Cannot Tell!

9


Cost

• Classic Barbecue
• We barbecued for 3 hours.
• We used a bag of CHARCOAL . 22.90
• We used a box of FIRE STARTER. 8.00
• Total 30.90
• Per Hour 10.30

• Electric Barbecue
• According to non-residential electricity fees,
  using 12,000w of electricity, we use 12 degrees
  of electricity. 11.68/h
• Per Hour 11.70

The cost isnt that expensive.
10
Air Pollution

• We used a bottle to collect the fumes from the
  electric and classic barbecue pits.
• Then we added limewater.
• We shook them thoroughly.

Classic
Electric
The limewater in the electric barbecue fumes
bottle is slightly clearer.
11
Solid Pollution

• We weighed the rubbish we produced after the
  electric barbecue and the classic barbecue.
• We got the following results

Electric BBQ produces much less rubbish.
12
Speed

• Using Classic Barbecue to barbecue a sausage
  32.24s
• Using Electric Barbecue to barbecue a
  sausage154.82s

Classic Barbecue is faster. However, food
barbecued on it is easier to get burnt.
13
Convenience

• Classic Barbecue
• 40 minutes of fire starting (less if you have
  skill)
• Adding charcoal once in a while

• Electric Barbecue
• A few minutes of booking, and a few minutes of
  heating up
• Cannot boil liquids due to safety reasons
• Can roast (unexpected)
• Affected by electricity supply
• Easy maintenance

14
Conclusion

• There is actually no substantial difference
  between Electric barbecue and Classic barbecue.

15
Follow-up

• We will conduct a survey on whether the people
  would choose electric barbecue or continue using
  classic barbecue, after knowing that they are
  actually the same.
• We will research on the fee collection.

16
Just for Fun

• Im inside! Dont come in!
• Chicken wings heart attack!