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Experimental design : Record all details related to your experimental design. For each research question, there should be 1 hypothesis. For each hypothesis, there should be 1 experiment. How many levels are there for the independent variable (usually 6 for a significant evaluation of hypothesis)? How do you change the independent variable? How do you measure the dependent variable? Did you carry out a trial experiment? Did you repeat your experiment and take the average to improve accuracy? There are some designs that are unique to your experiment.
> Yes, we carried out the trial experiment. The first trial experiment was on 18 February, where we trialled the setup in order to check if the pieces of equipments were correct and placed correctly. After the 1st trial, we found out that because the water was transparent, the results were not very visible. The 2nd trial experiment failed because of the area, the place was dark and the results cannot be seen clearly.
Experimental setup: Record all details related to your setup. Include a diagram and any changes to diagram subsequently if your setup should change during the course of the experiment.
> In order to check if our hypothesis was true or false, we conducted the experiment, including 2 trial experiments and 1 final experiment. After the experiment, we found out that our hypothesis was incorrect.
> Below is a visual representation of our experiment and our real-life experiment.
Experimental procedure. Record all details related to your procedure. Document your steps, trials, and observations to be made. Make sure that your experimental design steps (e.g. levels of independent variable, repeat experiment) are incorporated to the procedure section. You must also list the procedures on how would you analyse the data, including a table that you will use to tabulate your data, a graph if your hypothesis is correct, and how you will arrive at a statement of how your hypothesis is verified or not.
Procedure
Drill 4 holes on the upper walls of the container to place retort stand into them to ensure that the water dispenser is tightly secured.
Drill 3 holes along the pipe and secure the straws in place with a glue gun. Ensure that all straws are of the same length.
Set up the experiment as shown in the diagram above, placing the water dispenser on the stool, connecting the pipe connectors and the pipes attached with straws.
Once the setup is complete, get a bucket of water and dye the water with dark food colouring for more obvious results.
Pour the coloured water into the water dispenser and ensure that the tap is closed.
Once all the water has been poured into the water dispenser, open the tap and allow the water to flow.
Observe the water flow to the straw and record a video of the whole process.
To calculate the height of the water, rewatch the video and screenshot two instances from the video where all the straws contain water.
From the screenshots, measure the height of water in the straws according to the pictures. Measure the height of the straws in real life and do an estimation of the water level in the straw in real life.
After finding out the results, place them in the table below.
11. Plot a graph according to the results to show the drop in pressure in the straw.
12. From the graph, we can then conclude whether our hypothesis is correct.
Be sure and clearly note any modifications you make and any problems you encounter, including any mistakes. Even if it seems trivial or inconsequential, you should write it down in this paragraph.
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