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* * * Plants and pH * * *

Results and Photos Trial 1

The table below is the results to my to trial one of my experiment. Trial 1 didn't turn out the way I planned. Plant 4 (pH 7.5) didn't grow as well as it should have. I used toothpaste and diluted it with water. However the substance was still too thick, which is the main reason why it didn't grow very well. Plant 3 (pH 7.0) grew the best, the next was plant 5 (pH 8.5). However as pH 7.5 is closer to neutral, it should have grown better. This is why in trial 2 of my experiment I used pond water as pH 7.5. This worked better and the results for trial 2 were more accurate.  I also included  took digital photos of my plants which i took twice a week. This was another way I recorded their progress. I took both individual and group photos of my plants, so you can not only see there progress individually, but you can compare their heights with each other.
 
Results Table Trial 1
 

 

Day

Height (cm)

Plant 1 (pH 4.5)

Plant 2 (pH 6.0)

Plant 3 (pH 7.0)

Plant 4 (pH 7.5)

Plant 5(pH 8.5)

1

3

5

7

9

11

13

15

17

19

21

13.0

13.0

12.7

12.5

12.5

13.0

13.5

13.7

13.6

13.5

13.5

13.0

12.8

12.5

12.8

13.0

13.0

13.0

13.0

10.5

10.5

10.0

13.5

13.5

14.3

15.5

18.0

19.0

20.2

20.2

21.2

22.6

22.6

14.0

13.7

13.3

13.0

13.0

13.5

13.5

13.7

14.0

14.0

14.0

13.5

14.0

14.0

14.4

15.8

16.5

16.7

17.1

18.0

18.0

18.0

day1.jpg

group1.jpg

day5.jpg

group5.jpg

day9.jpg

group9.jpg

day13.jpg

group13.jpg

day17.jpg

group17.jpg

day21.jpg

Intel Young Scientist 2004