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Mr. Pumphrey and Mr. Drake Period 1 Biology Acid Rain Lab Purpose: The purpose of this lab is to test the effects of acid rain on plant growth. Research: Acid rain is caused by pollutants released into the air joining with water vapor molecules in clouds. This rain then falls and has damaging effects on plants, animals, and water and building sites. The problems with acid rain result in the fact that it leads to unstable conditions for life. Damage caused to plants can be reversible by changing the conditions in the soil, but damage to buildings and roads can be much more difficult to fix. Hypothesis: Acid rain will cause plants to grow slower and die quicker than plants exposed to non-polluted rain. Materials: Cups Rains Samples Graduated cylinder Rulers Dirt Beakers Markers Tape Seeds Droppers Graph paper Procedure: (Your procedure must be much more detailed than this). 1. 2. 3. 4. 5. 6. Plant seeds in 2 dirt cups Water seeds every day Measure seed growth Collect data Chart data Test hypothesis with data Data: The data shows that the seeds grown in the regular rain water grew to an average height of 8 cm after ten days. The growth of plants in the cup with acid rain grew to an average height of 3 cm. The plants in the normal rain cup appeared healthy and green. The plants in the acid rain cup had shriveled leaves and brown spots along with stunted growth. Day 1: Day 2: Day 3: Day 4: No growth No growth- added 10 ml of acid rain and 10 ml of regular rain Seeds begin to sprout 10 ml of acid rain added 10 ml of regular rain added Seeds have grown 2cm 10 ml of acid rain added 10 ml of regular rain added ***See data sheet/graph to view growth statistics or include data table and graph here. Conclusions: The hypothesis was supported by the data and the conclusion is that acid rain limits plant growth and damages parts of plants when exposed to steady levels of acid rain.