Instructions - save this document to your computer, fill in the questions, photos and figure, save the modified document, and then submit it via canvas under assignments. the worksheet will not be accepted if pictures are not included. pre-lab questions (1 pt. each) 1. what is acid deposition (include which gases react with the atmosphere and what acids are formed) 2. what human activity produces the majority of these gases in the u. s.? 3. in a natural environment, what contributes to surface water alkalinity (resistance to change in ph)? 4. explain how acid rain might negatively impact aquatic ecosystems. results (2 pts. each) 1. insert photos (one for each day) of the four petri dishes on days 1-3 of the experiment in the space below. the labels on the dishes should be clearly visible with the appropriate concentrations, as well as the days. 2. create a bar chart showing the number of seeds (out of 20) that germinated by the end of the experiment for each bar for control, one for 0.0018m, one for 0.018m, and one for 0.18m. you can draw the graph by hand and insert a picture of it or you can create the bar chart in excel and insert it in your document. discussion questions (1 pt. each) 1. did lettuce seed germination respond in a predictable way? describe the trend and mention any concentration that did not fit the trend 2. according to this activity and the background reading, how could acid rain affect specifically impact food supplies?