To analyse our results, we have to first make sure that the amount of leaves on each celery stalk is 4. After leaving the stalks in the beaker for 1/3 hour, dry the end of the celery stalk with dry kitchen towel and carefully start cutting the celery from the top. Repeat the experiment 2 more times but with different fan speeds and record down all the data and find the average distance the red dye travels for each respective independent variable. Next we record everything in a table and find out how the speed of win has affected the rate of transpiration of the celery stalks. We are going to focus mainly on the distance travelled by the red dye and the fan speeds 1,2 and 3.
2.1 Equipment List
- Clean Beaker (250ml) x1
- Bunch of celery (approximately 8 in one bunch) x2
- Bottle of Red Dye Mixture x1
- Fan x1
- Pen Knife x1
- Chopping Board x1
- Ruler (to measure constant distance between the fan and setup) x1
- Timer x1
2.2 Diagrams of experimental setup
Diagram 1: Cross-Section of Celery
Diagram 3: Top view of celery set-up
Diagram 3: Overall view of set-up
Diagram 4: Set-Up w/ labelling
1. Set up the experiment as shown in the diagram above.
2. Pour 150 ml of water into each beaker
3. Form a solution of red dye and water (2 drops of red dye + 150ml of water)
4. Put 3 celery stalks into the beaker for 10 min (at different fan speeds). (ex. Speed 1, Speed 2, Speed 3) (3 celery stalks so that results would be more reliable)
5. After 30 minutes, take the celery stalks out and chop the celery from the top to the bottom until the red dye is visible.
6. Using a metre ruler, measure the distance travelled by the red dye up the stalk.
7. Record the information down onto a table.
8. Using the findings, plot a bar graph with the x axis as the fan speeds (ex. 1, 2 and 3) and the y axis as the distance travelled by the dye.
9. Test our hypothesis on whether fan speeds affect the distance travelled the by red dye.
2.4 Risk Assessment and Management
2.5 Data Analysis
To analyse our data, we have to record down the distance travelled by the red dye, then calculate the average distance by the dye. We plotted a histogram and from the graph, we can see that when the speed of wind increased, so did the rate of transpiration, hence causing the distance travelled by the red dye to be further.