Ocean Acidification and Shells Lab
The effect of composition of water on absorption of CO2
" What are we trying to find out? How? " - We are trying to find out the affect that hot water, cold water, regular room temperature has with carbon dioxide added to it through time, we determined this by taking the calculating the Ph of the water. Pre-Lab 1. What gas are you blowing in the water? - The gas that we are blowing in the water is CO2 2.What happens to the gas when you blow it into the water? -The gas when blown into the water is absorbed 3. How are you measuring change in the water during this lab? -We are measuring change in the lab with the pH which can be determined by color change. 4. What does the measuring of the pH of the water tell us? - Measuring the pH of the water tells us the acidity of the water through time. 5. After studying the reactions above, how do you think the carbonic acid will affect the pH of salt water? - The pH of the water will become more acidic. Hypothesis: what did you predict would happen when you blow into the water? : Once we blow into the salt water or any type of water once the carbon dioxide touches the water it will become more acidic. Protocol: Room temperature and cold water
Data Table: Post Lab:
As you blew through the straw, what were you adding to the water and how did that change the pH? - What we added was Co2 and once the carbon dioxide was added to the water it became acidic. What did the universal indicator tell us about the water? - The universal indicator told us the Ph through the color change. What does this tell us about the effects of carbonic acid in ocean water? - This tell us tat it makes the water more acidic. Based on the results of your experimental protocol, which factor affect the pH of the water the most temperature or salt? -From the experiment temperature water affects the pH of the water the most it might be similar in numbers but it becomes more acidic faster. Conclusion: Was your initial hypothesis correct? Why or why not? Explain. What did you learn about ocean acidification ? - My hypothesis from the start was correct because in the beginning i predicted that no matter which type of water carbon dioxide was added to it will still become more acidic. The temperature through time changes but the water still become acidic because carbon dioxide is bad for it. I learned that CO2 will affect the water endless of it but it depends on how much carbon dioxide is put into the water and the amount of time its there. I also learned that the acidity will stay constant through some time and that cold or hot water makes the reaction of acidity much faster. |
The effect of vinegar and salt water on sea shells
What are we trying to find out?why? -We are trying to find out how sea water and vinegar affect sea shells. We had to do this by weighing before and after being put into sea water and vinegar. It took time so we had to wait several minutes to answer this question. Pre-Lab How do organisms make their shells? What are shells made of? -Shelled organisms and organisms that create calcium carbonate skeletons What do you expect to happen to the shell in a acidic solution such as vinegar? I expect for the shells to break their top layer or become more weak through the time it is put into the vinegar. What are sources of carbon dioxide and which of these sources are more likely to affect ocean pH? -Sources of carbon, which will affect the pH of water the most because once it mixes it will cause at the end Calcium carbonate which affect the water a lot. Hypothesis: Once the shells are put into a acidic solution it will affect the shells and make them more weak than they are when they are put into sea water. Protocol:
Post- Lab
-When you immersed the shells in vinegar how did you know that a reaction was happening? I knew that the reaction was happening because their was bubble all through out the shell and they were also bubbling up. 2. How did observing the shells in vinegar relate to how animals are affected by a lower pH of ocean water? Looking at shells in vinegar relates to how animals are affected by pH of ocean water because with this we saw that this little acid solution affected a lot and any change can just affect he animals. The shells that we did not experiment on and just observed looked very weak and were breaking and that concludes that just like animals they are weak and more amount are dying and not be able to survive in the waters. 3. How would shelled organisms be affected by a lower pH of ocean water? The shelled organism would be affected because their shells will become weak and eventually dissolve. 4. What are the primary functions of shell for these animals? - The shells for some animals is their home or their protection. 5. Does it cost the animal energy to rebuild or repair their shell? -It does cost a lot of energy to rebuild the shell and it will take a long time to adapt to the new environment. Conclusion:
Was your hypothesis correct? Why or why not explain. My hypothesis for this lab was incorrect. My hypothesis was incorrect because i though that the vinegar was going to affect the shell more than the Sea Water. From my data table you can see that the Se water affected the shell by increasing the mass of the shell and all the vinegar did was create a reaction. By the end when we massed the shell that was in the vinegar it was the same mass which confused us but through time we will understand what this means. Background information : |