1. Cheap vs eXpensive T-shirts
Leader: WONG WAIHO(32)
Group member: prashant( 29)  ,umer(21)  
                                 Kathleen(26)   ,ayub(13)
          

2. Reason for the Investigation
Generally speaking, the real purpose of conducting a research is to gain new knowledge and gather evidence.
To know if the shirt is worth buying.
To find the right t-shirt for that person who want a good t-shirt.

3. Are expensive t-shirts worth buying?
Investigation topic
Are expensive t-shirts worth buying?
Drying speed 
Comfortable
Waste of money or not 

4. Related scientific KNOWLEDGE
Fabric
Design 
Time it
 takes to dry 
Comfort

5. T-shirts used School P.E T-shirt ($77) Adidas T-shirt ($220)
Nike        T-shirt($230)

6. The fabrics P.E ( COTTONS, WOOL)
ADIDAS (commonly use recycle materials like polyester,rubber,cotton PLA( WOOD PIULP),wool and leather.)
NIKES  (cotton ),(made of 100% polyester 150gsm dri fit  mesh fabric) 

7. Scientific knowledge
"water evaporation, it takes some of the heat energy from our clothes"
"evaporation is a process where liquid dries and turns into water vapor"
"when a wet object  dries, it will lose a lot of heat because of evaporation"

8. stand
Experimental setup
Hair dyer
Water
Cup
Dropper
Test tube
clothes

9. procedures Use 5 /10/15 water drop wet the part of T-shirt
Use  10 ml of water to wet the  T-shirt
Use stop watch to record the time 
Turn on the  heater and start record 
Use tissue on it and see which is more dry

10. Make video on the wet to ”dry T-shirt”
Collect evidence
Make video on the wet to ”dry  T-shirt” 

11. In the experiment video picture

12. record Sport T-shirt Nike 5 drops /time School Pe T-shirt Adidas
6 min 11s
2min 30 s
3min
10drop /time
6min  56s
2min 51s
4min35s
15drop /time
7min 34s
3min 10s 
7min10s
10ml/time
12min 53s
9min 14s
11min5s

13. Conclusions
The most comfortable and the most worth buying is Nike. Even though it is the most expensive T-shirt; it is worth the price. It is also the most comfortable to wear because its fabric is very lightweight that means it is easy to move around in.

14. error of the experiment
Unsure if the t-shirts is fully dry.
Not accurate enough of the time measurement of the results of the experiment.
The heat of hair dryers. 
Unsure if the water amount is the same as the others.
This Photo by Unknown author is licensed under CC BY-NC.

15. Corresponding improvement for the experiment
The accuracies of our experiment‘s results of the time.
To check the t-shirts of the dryness accuracies.
an appropriate place to do the experiment.
Buy more stop watches and hair dryers to do the experiments.

16. Reflections Find ways to do the experiment.
Get more information about the T-shirt’s .
Do the experiment again to get a more accurate results.

17. Thank You!