1.4 Demo Ballon in fles - Onderzoeksvaardigheden

• Natuurkunde / Scheikunde
• Middelbare school
• vmbo b, k, t, havo, vwo
• Leerjaar 1-3

Regels van orde

1e keer:  Waarschuwing --> Maximaal 3 namen op het bord

2e keer: Kleine schrijfopdracht op de gang

3e keer: Eruit, naar Loket 21

Nooit! 

Geluid uit telefoons / Oordopjes in 
Gooien
Eten/drinken 

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Get your things please:                                

1.4 Demo Balloon in a bottle
Research skills

• Quiz
  
• What makes a good research?
• Demo balloon in a bottle
• Discussion & Research Report

I want to bring my marbles on an airplane trip, but I don't know if I'm allowed to bring them on the plane.
What should I measure?

1. The number, without a unit
2. The mass in the unit of kg
3. The volume in L or in m³

I am measuring some chocolate on
a digital scale in grams.

What is correct?

1. I've measured exactly 412 g.
2. I've measured between 411,9 g and 412,1 g.
3. I've measured 412,0 g.
4. I've measured between 411,5 g and 412,5 g.

Questions about the homework?

• Homework was:
  
  
• Read chapter 1.1
  
  
• Do exercises 1,2,3,4,5

Exchange:
The following person may explain:

V5

V2

From mega to micro

• mega                   M                 1.000.000                  million
• kilo                        k                           1.000                   thousand
• deci                      d                                   0,1                one tenth               1/10
• centi                    c                                    0,01             one hundredth    1/100
• milli                      m                                  0,001           one thousandth  1/1000
• micro                  µ                                    0,000 001  one millionth        1/1.000.000

Learning objectives

• You can write down how to do scientific research in a
    structured way.
  
  
• You can write down observations and a conclusion of
    research you did.

Balloon in a bottle

What do we have?
A balloon in a bottle.

What will we do?
Suck the air out of the bottle.

Make a structured scientific report about this experiment.

Doing research - structured

1. Research question
2. Hypothesis / Prediction
3. Apparatus Beware: Apparatus means 'inrichting', 'benodigdheden',
   NOT 'apparaat'!
4. Method
5. Observations
6. Results & Conclusion
7. Suggestions

Doing research - structured

1. Research question: A question that describes what you want to find out.
2. Hypothesis / Prediction: Describe what you predict the answer to be.
3. Apparatus: Describe what you need.
4. Method: Describe what you will do.
5. Observations: Describe what you see, hear, smell, taste, feel.
6. Results & Conclusion: Try to explain the observations.
   Answer the research question if possible.
7. (Suggestions: You can make suggestions about further research.)

Homework

Read chapter 1.4

Do exercises
35, 36, 41, 45 of chapter 1.4

 = Homework

..:..

Measuring: Always inaccuracy

Quantities & Units

quantity	symbol	unit	abbreviat.	m. instrum.
mass	m	kilogram	kg	scales
volume	V	litre	L	graduated cylinder
length/distance	l / s	metre	m	ruler, measuring tape
temperature	T	degree Celcius	°C	thermometer
time interval	t	second	s	clock, stopwatch
number	-	-	-	counter