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To stimulate the effect of acid rain on plant life, students to set up a lab experiment to compare the effect of varying levels of acidity on plant seed germination.

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Introduction

Effect of acid rain on seed germination Aim: To stimulate the effect of acid rain on plant life, students to set up a lab experiment to compare the effect of varying levels of acidity on plant seed germination. Hypothesis: As the pH of water decreases, the number of seeds germinated will reduce. Variables: Units Dependent variables The number of seeds germinated - Independent variables The pH of water - Controlled variables Units Possible effects on results Sunlight it will start the process of photosynthesis which accelerate the growth of seeds Purity of water pH it will have an effect on the acidity of water which will ultimately affect the germination of seeds Amount of air in zip bag as it is one of the sources of energy for the plants, its presence will accelerate seed germination Controlled variables ...read more.

Middle

2. Place filter paper in each the Petri dish with 10 seeds. Cover the seeds with another piece of filter paper. Use a dropper to moisten the filter paper through all layers with the 8.0 pH solution. Put the dishes in a sealed plastic bag and place them in a dark place. 3. Repeat steps 1 & 2 for 6.0, 4.0, 2.0 & 0.0 pH Solutions. 3. 1 - 5 days later, count the number of seeds that have germinated. 4. Measure the root length of each of the seedlings. Record observations about seedling condition (color and overall growth and appearance of seedling leaves). 5. Tally class averages for each pH for germination and root length. Graph your data and the class averages. ...read more.

Conclusion

Then we checked the growth of seeds everyday and took the reading. Evaluation-: While doing the experiment my all the data was perfect. There was error, while doing the experiment. Radish should have grown in2 and 4 % but even one seed did not grow. The acid rain water of each sample at each stage was different. There may be some external substances may have entered the sample and cause a variation in the salinity of the water of the sample. There was a more effect of acid rain water in 0% and 8% as is basic. As 0 and 8% of seeds grew faster than other three. Conclusion-: As we know that our experiment went wrong as there was an error in it. The least growth was in 2 and 4% and fastest was in 0 and 8%. And the highest percent of growing seed was in 0% in day 4 with maximum 10%. ...read more.

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