1. Review: Curved Mirrors
Reporter: China Qing Dao
Opponent: Russia 12 FM
Reviewer: Switzerland
IYNT 2017-Team Switzerland

2. IYNT 2017-Team Switzerland
Problem
3. Invent Yourself: Curved mirrors
Suggest and demonstrate interesting experiments in which large concave mirrors can be used to heat up or cool down various objects.
We built a sun oven in order to prove that large concave mirrors can be used to heat up various objects and that light which parallels the principle axis all converges at the focus. We also did some experiences to determine the position of the focus and prove that the temperature of the focus is the highest. 
A) Apples
Why do apple slices turn brown after being cut? Investigate the speed of this process and test methods to prevent browning of apple slices.
B) Growing through asphalt
Can a little plant grow straight up through concrete or asphalt?
C) Tonic water in UV light
Tonic water glows brightly when exposed to an ultraviolet black light bulb. It is however easy to quench the glow of tonic water by adding salt. Investigate this effect. What other common substances glow under UV light and how can one influence their glow?
D) Salt production
Solar evaporation of seawater or salt mining are common methods to produce common salt (NaCl). Propose a method to extract salt from a natural source and determine both productive capacity of your method and purity of the product. Demonstrate an amount of salt produced by your method.
E) Rijke's tube
If air inside a vertical cylindrical tube open at both ends is heated, the tube produces sound. Study this effect.
F) Grow light
Investigate how different types of artificial lights affect plant growth. What is the role of light spectrum?
G) Milk
Develop simple methods allowing determination of some of the important properties of milk. Suggest an investigation requiring comparison of various milk samples.
H) Allometry
How do length and thickness of bones scale with overall size and weight of animal?
I) Routers and garden cress
In 2013, five young students claimed a sensational discovery that garden cress (Lepidium sativum) won't germinate when placed near two Wi-Fi routers. Reproduce their experiments under controlled conditions to support or dismiss their conclusions.
J) Water from the air
Design and construct a device allowing collection of water by condensing moisture from air. Determine if the water obtained with your device is suitable for drinking. What amount of water is possible to collect during one Science Fight?
K) Paper wrinkles
When a piece of paper dries after being wet, it can get wrinkled. Investigate and explain this phenomenon.
L) Tornado machine
Build a machine to produce an indoor air tornado. Investigate the properties and stability of the tornado. Is the machine portative enough to be demonstrated at a Science Fight room of the 1st SYNT?
Task partially fulfilled
IYNT 2017-Team Switzerland

3. Problem & Interpretation
Outline of Report
Problem & Interpretation
Cooling
Theory: Parabolas
Theory: Focus
Theory: Light
Setup
Experiments: Heating
Analysis: Heating
Experiments: Focus
Analysis: Focus
Conclusion
▪ Good ▪ Ok ▪ Needs Improvement

4. Strengths and Weaknesses Reporter
Large amount of theory on parabolas
Went in depth about the ability of parabolas to focus light
Determined the actual focus of the parabolic mirror
Visuals included in slides to try and show data
Controlled variables such as weather conditions
Irrelevant information on parabolas (e.g. formulas)
Slides unorganized and chaotic (formulas)
Cooling not mentioned at all
Name of concave curve used (parabola/paraboloid for 3D) not mentioned
Reason why parabolas focus light
Graphs not used to represent data
Did not specifically mention what concave means
Visuals not perfect (e.g. mistake in parabola visual)
IYNT 2017-Team Switzerland

5. Strengths and Weaknesses Opponent
Clarifying questions not used well
Superficial weaknesses used instead of specific weaknesses
Incorrect weaknesses and strengths (e.g. dimensions of mirror)
Time was not used well
Read directly off of slide for strengths and weakness
Irrelevant questions asked to reporter (e.g. questions about focus)
Asked some questions during the discussion and clarifying questions
Was able to point out certain flaws in the reporters experiments
IYNT 2017-Team Switzerland

6. IYNT 2017-Team Switzerland
Discussion
Burning of paper
Focus point
Environmental factors
A) Apples
Why do apple slices turn brown after being cut? Investigate the speed of this process and test methods to prevent browning of apple slices.
B) Growing through asphalt
Can a little plant grow straight up through concrete or asphalt?
C) Tonic water in UV light
Tonic water glows brightly when exposed to an ultraviolet black light bulb. It is however easy to quench the glow of tonic water by adding salt. Investigate this effect. What other common substances glow under UV light and how can one influence their glow?
D) Salt production
Solar evaporation of seawater or salt mining are common methods to produce common salt (NaCl). Propose a method to extract salt from a natural source and determine both productive capacity of your method and purity of the product. Demonstrate an amount of salt produced by your method.
E) Rijke's tube
If air inside a vertical cylindrical tube open at both ends is heated, the tube produces sound. Study this effect.
F) Grow light
Investigate how different types of artificial lights affect plant growth. What is the role of light spectrum?
G) Milk
Develop simple methods allowing determination of some of the important properties of milk. Suggest an investigation requiring comparison of various milk samples.
H) Allometry
How do length and thickness of bones scale with overall size and weight of animal?
I) Routers and garden cress
In 2013, five young students claimed a sensational discovery that garden cress (Lepidium sativum) won't germinate when placed near two Wi-Fi routers. Reproduce their experiments under controlled conditions to support or dismiss their conclusions.
J) Water from the air
Design and construct a device allowing collection of water by condensing moisture from air. Determine if the water obtained with your device is suitable for drinking. What amount of water is possible to collect during one Science Fight?
K) Paper wrinkles
When a piece of paper dries after being wet, it can get wrinkled. Investigate and explain this phenomenon.
L) Tornado machine
Build a machine to produce an indoor air tornado. Investigate the properties and stability of the tornado. Is the machine portative enough to be demonstrated at a Science Fight room of the 1st SYNT?
IYNT 2017-Team Switzerland

7. Thank you for listening