roots, and unsteady rocks posed constant threats for my exhausted body. Without glancing up I knew what was ahead: the same dense, impenetrable green that had surrounded us for hours. My throat prickled with unfathomable thirst, as my long-empty Nalgene bottle slapped mockingly at my side. Gnarled branches snared at my clothes and tore at my hair, and I blindly hurled myself after Sara. The portage had become a battle, and the ominously darkening sky raised the potential for casualties. Gritting
One of the greatest problems facing humanity is global climate change. Global climate change is the increase in average global temperature, caused by an increase in greenhouse gases. Greenhouse gases are the blanket of gases surrounding the earth that allow the world to be inhabitable. This layer of water vapor, carbon dioxide, methane, and other gases works in the same way that a greenhouse does, by trapping heat energy inside the atmosphere. Unfortunately, since the Industrial Revolution
tube into a Nalgene bottle capable of holding 250mL and mix contents. Place an O2 sensor in the mouth of the Nalgene bottle thus plugging the bottle ensuring no outside air will contaminate the air the probe/sensor is reading from. One can start data collection after 30 seconds, collect for 3 minutes, retrieve a graph of the O2 data on a time-longitudinal scale disconnect O2 sensor from Nalgene bottle, pour out contents into a safe and disposable waste receptacle/drain. Clean out Nalgene bottle and
water bath, and test tube 4 was placed in a hot water bath. All four test tubes were left set for 10 minutes. 10 drops of the yeast was added to test tube 1 and poured into a 250mL Nalgene. The Nalgene was swirled and the O2 sensor was attached to form a seal around the top. When the test tube was poured into the Nalgene the stopwatch was started and date was collected after 30 seconds and until 180 seconds. The data and rate of O2 production was collected. The group then repeated the same steps for
removed from the incubator. b) 1mL of the solution was transferred from G1 to the 250mL Nalgene bottle. c) The CO2 sensor was placed firmly in the opening of the Nalgene bottle. d) The concentration began being measured by pressing the collect button 11) When the data finished running, the data was stored by saving and making a screenshot of the data. 12) Before the time elapsed on the G2 test tube, the Nalgene bottle was thoroughly washed and dried using the paper towels. 13) The tip of the CO2 gas
The disaccharides were: maltose and sucrose. The monosaccharides: glucose, fructose and lactose. In the experiment, the amount of CO2 produced was recorded by a gas sensor over a period of fifteen minutes in a Nalgene bottle of 3mL yeast solution and 3mL of sugar solution. It was predicted that the disaccharide sugars would produce a higher rate of cellular respiration, however, this hypothesis was proven wrong during the experiment. The data revealed that glucose
The ongoing debate over the chemical Bisphenol-A, lining plastic bottles and containers, sold in our grocery store, is far from over. Most notably we see BPA in plastic water bottles, plastic food containers, and other packaged foods. Plastic bottled water is terrible for consumers and should only be given out in situations such as natural disasters and severe drought to save lives when no additional clean water source is available. Plastics lined with BPA should be banned altogether. Studies show
In 1947, plastic containers were first commercially used to hold liquids, but not until the 60’s were they consumed by the general public. At first, plastic was extremely cheap to make; however, in recent years the price to manufacture plastic has skyrocketed. In 2011 alone, over eleven billion dollars were exhausted in the fabrication of plastic water bottles. All this money fuels the creation of about fifty billion bottles worldwide. Sadly, Americans have become reliant on disposable plastic containers;
Something small like a bottle of water could be harmful in many ways, but most don’t know or pretend not to acknowledge this issue.The advantages of having bottled water exceed the disadvantages. Commonly, it 's favorable to drink from bottles more than taps. For it 's easier to carry a bottle of water around and there’s the presumption that it 's healthier than tap water. However, when comparing tap and bottled water based on cost, health, environmental impact and taste, tap water proves to be
with a specific volume and concentration of sugar with a certain amount of yeast in each test tube. Two of the three test tubes will have similar concentrations of sugar with different amounts of yeast... ... middle of paper ... ... a weighed Nalgene bottle and spread in a layer on a side of the bottle and then reweighed. A carbon dioxide sensor will be placed on the bottle opening. Using Lab Quest recorder, data will be collected for five minutes. After, the slope of the carbon dioxide production
At the time of conducting the experiment, the intention was to analyse the effect that an increase in catalase concentration had on the amount of oxygen (O2) produced if the hydrogen peroxide (H2O2) concentration was constant. It was proposed that when the catalase increases in concentration at the increments of 0.5%, 1%, 2%, and 4% and the hydrogen peroxide remained at a fixed concentration, the oxygen production would rise gradually. It was suggested that this would occur due to the collision theory