Observations Data of weight change due to loss of water (Me, Stephan & Nick) (m)Mass of leaves in g (m1) Mass of leaf + vaseline in (g) (m2) Mass of leaf after 2 days in grams (g) ((m1 - m2)/m*100) percentage mass change in % No vaseline 0.09 0.09 0.03 66.67 V on top surface 0.09 0.10 0.04 66.67 V on bottom surface 0.11 0.13 0.07 54.54 V on both surfaces 0.08 0.10 0.09 12.5 Data of weight change 2 due to loss of water (Lolita, Ranjita & Ngoc) (m)Mass of leaves in g (m1) Mass of leaf + vaseline in (g) (m2) Mass of leaf after 2 days in grams (g) ((m1 - m2)/m*100) percentage mass change in % No vaseline 0.38 0.38 0.11 71.05 V on top surface 0.35 0.39 0.27 34.29 V on bottom surface 0.42 0.48 0.37 26.19 V on both surfaces 0.43 0.51 0.48 6.98 Data of weight change 3 due to loss of water ( Katie & Jenna) (m)Mass of leaves in g (m1) Mass of leaf + vaseline in (g) (m2) Mass of leaf after 2 days in grams (g) ((m1 - m2)/m*100) percentage mass change in % No vaseline 0.08 0.08 0.03 62.50 V on top surface 0.07 0.12 0.07 71.43 V on bottom surface 0.07 0.11 0.08 42.86 V on both surfaces 0.08 0.12 0.10 25.00 Average of change in mass in % No vaseline 66.74 V on top surface
Water from a variety of sources that receive precipitation is being sampled. Using a pH meter, the pH of water samples is being measured. In the first approach using titration methods in combination with pH measurement, the volumes of sulfuric acid needed for reaching two different pH levels are being measured. Difference in the volume of sulfuric acid used, is an equivalent for the amount of CaCO3 expressed in grams per (gL-1) in the analyte. Therefore the alkalinity of water samples is being calculated.
a. Pyrite hypothesis accept/reject = I accept my hypothesis because after the pyrite was introduced to the water the level of ph dropped to 4 making the water more acidic. b. Coal hypothesis accept/reject = I reject my hypothesis because the ph level rose slightly making it less acidic after the coal was introduced to the water sample. 3. Based on your data, what effect do you predict coal mining has on the environment?
Question 12 options: niche biome community population Question 13 The temperature optimum for an enzyme is 37C. What will most likely happen if you increase the temperature from 37C to 50C? Question 13 options: The enzyme activity will not be affected The enzyme activity will increase The enzyme activity will decrease The pH will increase Question 14 When celery is placed in a glass of pure water the solution inside its cells is _____ compared to the water. Question 14 options: selectively permeable isotonic hypertonic hypotonic Question
Energy Sources and Alternative Energy Christina Childs SCI207: Dependence of Man on the Environment Instructor: Marc Jackson November 10, 2014 Lab 4 – Energy Sources and Alternative Energy Experiment 1: The Effects of Coal Mining Table 1: pH of Water Samples | Water Sample | Initial pH | Final pH (24-48 hours) | Pyrite | 6 | 4 | Activated Carbon | 7 | 8 | Water | 7 | 7 | POST LAB QUESTIONS 1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water? a. Pyrite hypothesis = If pyrite is added to with 100mL of water, it will decrease the pH over 48 hours. b. Coal hypothesis = If activated carbon is added with 100mL of water, it will increase the pH over 48 hours.
Less germinated in the presence of 1% ammonium nitrate compared to the spores not in the presence of ammonium nitrate. In other studies done, when ammonium is used to provide the nitrogen source for photosynthetic spores, they will not grow or germinate properly, and may show abnormalities and inhibited growth (Melan & Whittier, 1990). That is exactly what our experimental data showed us. After preforming the tests and compiling all the replicate data, we found that in the control group there was an average of 50.5 germinated spores per plate. In the plates containing 1% ammonium nitrate there was an average germination rate of 28.5 spores per plate.
The dependent variables are the salt freezing, and the time it took to freeze. 2. The experiment’s hypothesis is incorrect. The lower the temperature, the less time it took for the water to freeze. Carmen believed that the more salt, the lower the temperature is.
Calexico Hospital plans to invest $1.6 million in a new MRI machine. The MRI will be depreciated its 5-year economic life to a $200,000 salvage value. Additional revenues attributed to the new MRI will be in the amount of $1.5 million per year for 5 years. Additional operating expenses, excluding depreciation expense, will amount to $1 million per year for 5 years. Over the life of the machine, net working capital will increase by $30,000 over the life of the project.
Nevertheless, it has been determined that the unmet water deficiency in the future will diminish the occupation development to 41,000 by 2030 and to 130,000 by 2050. The economy has been limited by decreased water accessibility from Ogallala Aquifer with no ability to make the employments manage the local community groups in the zone (Torell, Libbin, & Miller
Even some states allow fracking to be exempt from state water use regulation, an agreement limiting large water withdrawals; despite the fact that each fracking well uses up to five million gallons of locally sourced water. In the article, Should Fracking Stop? The authors provided information that there are water recovery tanks. These water recovery tanks contain polluted flow-back water that gets injected to a deep storage well and eventually it is sent to a treatment plant. It’s a waste because clean water is not an abundant resource and it will eventually run out.