Group: 4 Group members: Sebastian Syaiful Zoel Niva Aim: To find out the effect of light on plant growth during photosynthesis. Hypothesis: The plant which is under the light will be more healthier than the plant in the dark. We researched that the the more there is light intensity,the better the plant would grow or else it will wither. Materials needed: 4 Bottles 20 Seedlings 1 Lamp 1 Box Soils Instructions:(Summary: Cut the bottles into half and throw away thre upper part.Name the bottle in A,B,C,D.Put the soil and seed in each bottle.(five of them).Put the black cloth on A and B and leave C and D under presence of light.At the end of the experiment and see which plant in the bottle is green and healthy.) 1) Place bottle A and B under the lamp without touching it. 2) Place bottle C and D in the box without any hole and opening. 3) Record the colour of leaves of plants in all bottles daily. 4) Measure the height of all the plants in all daily. 5)Compare the increase in growth of plant everyday 6)State a conclusion from your experiment and if the hypothesis our group discussed was correct. Results are in Microsoft Excel. Conclusion: This experiment shows that in order for photosynthesis to occur,there should be presence of light which is one of the most important factors and not only that there should not be to little or too much of light or else the plant will wither. Without the presence of light the plant will eventually die as it cannot photosynthesize therefore not able to make food. Comparison: Compared to the other groups that did light as their factor of photosynthesis, the measurements they took was different on particular days. But the colour of the leaves was more or less the same. We realised that they had a better work quality compared to our group in terms of the majong sheet as they had specific details on their hypothesis and instructions. It was easy to understand the concept of their experiment. At the end of this experiment our group will try to improve on our quality work in terms of this experiment. Acknowledgement: Thanks to: Wikipedia.org Yahoo.com.sg Google.com Factmonster.com Results for project Bottle A Date Colour of seedling 1 Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 Light Green Light Green Light Green Light Green Light Green 20/4/2009 Green Green Green Green Green 21/4/2009 Dark Green Dark Green Dark Green Dark Green Dark Green 22/4/2009 Dark Green Dark Green Dark Green Dark Green Dark Green 23/4/2009 Dark Green Dark Green Dark Green Dark Green Dark Green Bottle A Date Height of seedlings 1 (cm) Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 2.5 2.1 4.1 3.5 2.7 20/4/2009 7.4 11.8 7 7.9 7.6 21/4/2009 8.3 12.1 7.9 8.3 8.2 22/4/2009 28 36 22 28 19 23/4/2009 30 38 25 31 24 Bottle B Date Colour of seedling 1 Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 Light Green Light Green Light Green Light Green Light Green 20/4/2009 Green Green Green Green Green 21/4/2009 Green Dark Green Dark Green Dark Green Dark Green 22/4/2009 Dark Green Dark Green Dark Green Dark Green Dark Green 23/4/2009 Dark Green Dark Green Dark Green Dark Green Dark Green Bottle B Date Height of seedlings 1 (cm) Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 1.2 2.2 3.7 3.6 3.6 20/4/2009 6 7 11 10.5 8 21/4/2009 6.9 7.8 13 12 8.7 22/4/2009 18.5 20.8 18.8 26.4 19.8 23/4/2009 21.6 23.3 21.7 28.8 26.2 Bottle C Date Colour of seedling 1 Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 Light Green Light Green Light Green Light Green Light Green 20/4/2009 Light Green Light Green Light Green Light Green Light Green 21/4/2009 Green Green Green Green Green 22/4/2009 Green Green Green Green Green 23/4/2009 Green Green Green Green Green Bottle C Date Height of seedlings 1 (cm) Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 0.5 3.3 3.6 3.6 2.9 20/4/2009 2 5 5.2 5.6 4.7 21/4/2009 2.3 5.3 5.5 5.7 5 22/4/2009 3 6.5 7.3 7 5.5 23/4/2009 3.7 7 7.5 7.4 6.2 Bottle D Date Colour of seedling 1 Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 Light Green Light Green Light Green Light Green Light Green 20/4/2009 Light Green Light Green Light Green Light Green Light Green 21/4/2009 Green Green Green Green Green 22/4/2009 Green Green Green Green Green 23/4/2009 Green Green Green Green Green Bottle D Date Height of seedlings 1 (cm) Seedling 2 Seedling 3 Seedling 4 Seedling 5 16/4/2009 3.8 4.4 3.4 3.1 3.2 20/4/2009 4.1 5 4 3.9 3.8 21/4/2009 5 5.7 4.6 4.4 4.2 22/4/2009 6.1 6.5 5.2 5 4.9 23/4/2009 7 7.2 6.6 5.9 5.3