Science Experiment to Measure the Dissolved Oxygen Levels Using the HACH Method and CHEMets Test Kit
Purpose
The purpose of my project is to determine if there is any significant
difference in dissolved oxygen (DO) levels as measured by the traditional HACH®
method or the newly developed CHEMets® test kit under typical field conditions.
Hypothesis
My hypothesis is that there is no significant difference in dissolved
oxygen (DO) levels as measured by the traditional HACH® method or the newly
developed CHEMets® test kit under typical field conditions.
Review of Literature
"Ours is a watery world, and we, its dominant species, are walking sacks
of sea water. The presence of large amounts of liquid water on Earth make our
planet unique in the solar system." (Hill, 1992 p. 477)
People have recently become more concerned with preserving our earth for
future generations. Even the government pitches in to help save our earth by
enacting laws to help preserve our natural resources. There is local evidence
that improved sewage treatment means improvement in water quality. Monitoring on
a national level showed that large investments in point-source pollution control
have yielded no statistically significant pattern of improvement in dissolved
oxygen levels in water in the last 15 years. It may be that we are only keeping
up with the amount of pollution we are producing. (Knopman, 1993)
The early biosphere was not pleasant for life because the atmosphere had
low levels of oxygen. Photosynthetic bacteria consumed carbon dioxide and
produced simple sugars and oxygen which created the oxygen abundant atmosphere
in which more advanced life forms could develop. (Brown, 1994) The mystery of
how Earth's oxygen levels rose is very complex. Scientists don't agree when or
how the oxygen on earth got here, but we know we could not live without it.
(Pendick, 1993) Oxygen is crucial for humans to survive. Dissolved oxygen is
also crucial for most fish and aquatic organisms to survive. Dissolved oxygen
is for them what atmospheric oxygen is for humans. If humans have no oxygen to
breathe, they die. The same goes for fish. However, fish get their oxygen from
the water, and humans get theirs from the atmosphere. (Mitchell and Stapp,
1992)
Different aquatic organisms need different levels of dissolved oxygen to
thrive. For example, pike and trout need medium to high levels of dissolved
oxygen. Carp and catfish are the exact opposite, needing only low levels of
dissolved oxygen.
oxygen. Before I do this I must do a preliminary plan to see what my
Depression is an illness within itself that affects the “whole body”. (Staywell,1998) The body, feelings, thoughts, and behavior are all immensely altered when someone is depressed. It is not a sign of personal weakness, or a condition that can be wished or willed away. For some people depression is just temporary, but for others it can last for weeks, months and even years.
the problem of gas exchange, as water is not present in all of the terrestrial
of water. Then water is evaporated back up into the sky via soil or water bodies and it is
Some studies have found “that atmospheric CO2 concentration is approximately 383 parts per million by volume (ppmv), a level not seen in at least 650,000 years, and it is projected to increase by 0.5% per year throughout the 21st century.” (Guinotte) “This is because…the ocean absorbs about a third of fossil fuel emissions, but this amount is likely to increase to 90% in the future.” (Bralower) As a result, “the chemistry of the world's oceans is changing at a rate not seen for 65 million years, with far-reaching implications for marine biodiversity and food security, according to a new United Nations study...” (Knight) “…This change is cause for serious concern [for] many marine organisms…, [because they] may not be able to adapt quickly enough to survive these changes.” (Guinotte)
Earth is the element of life found here because with the sun, earth nurtures all plants and
borate) and 1.0 g. of sodium hydroxide in 20 mL of warm water. It may
In trying to attract new audiences, news media have begun to transition from reporting to becoming a form of entertainment. With the meteoric rise of social media’s role as a news source, the fight for an increase of diversity in the media, and the ever-growing desire of immediate content, the future of responsible journalism is more important than ever. Ask yourself, why do I think the way I do? Where do my political views originate? How do I prove them? Most likely, it is due to the biased portrayal of issues in the media and the politicization that accompanies what we consume. Now, compare your views to your preferred news reporting entity. More than likely, they are the same.
There are many people in the world who are struggling with the disease depression. Depression is the state in which a person feels very sad, hopeless and unimportant. The thing about depression is that it affects both genders and any ages. Depression is something that deserves full attention. For many reasons doctors believe that when a person has depression, they have to start taking medication for it as if medications help. People are becoming more dependent on antidepressants when there are other techniques for dealing with depression.
The sun makes the water evaporate in the sea and in lakes, which rises and thus is
Major Depression is a type of depression that makes you lose interest in activities you usually enjoy, you have lack energy, trouble concentrating, you change your eating and sleeping habits, you become extremely sad most of the time and have thoughts of suicide. You will probably be diagnosed sooner, if you suffer from this, because in a short amount of time you will be a completely different person, if you’re usually a happier person in general. In order to be diagnosed these symptoms...
The introduction of the internet to modern society has brought about a new age of information relation. Since there is no longer a need to wait until the next print day, news from all over the world is available at a person’s fingertips within hours or even minutes of the event. With this advent of such easily accessible information, new problems for the news media have also arisen. Aside from potentially losing good economic standing because newspapers are no longer being purchased in the quantities they used to be, the credibility of the information itself is also put into question. No one would argue that credibility of news sources is unimportant, but there is a discrepancy in what takes precedence; economy and speed or getting the information out correctly at the first publishing by taking the time to make sure all facts are checked. The importance of having a system of checks on all information submitted is paramount. People trust what they read and believe it to be so without always questioning. If all information were to not be checked thoroughly, there would be instances where people read an article only for information included to be wrong and they go on believing such information. This can be very dangerous as misinformed people make misinformed decisions. With an increase in errors being made by citizen bloggers and even major publications, many are worried that journalistic ethics and credibility in the news media are being sacrificed in order to maintain swiftness in the news circuit and to retain personal profits. Though getting information to the masses quickly is a major part of the media’s importance, this should not mean that the credibility of that information being presented should be sacrificed for it...
Life according to scientists is “the condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death, also the way of life of a human being or animal.”("Life,”) In order for one to have life, one must have the nine characteristics to be considered a living thing. These nine characteristics are; all living things are made up of cells, living things are able to reproduce, living thing use energy, maintain homeostasis, respond and adapt to the environment, grow and develop, have a life span, evolve over time, and are interdependence. All of the nine characteristics have one thing in common, something that is needed for all living things to use, even if they do not know it. This beautiful thing that all living things should value is photosynthesis. Without photosynthesis there wouldn’t consist humans, animals, insects, and most importantly life!
In 1953 Stanley Lloyd Miller conducted his famous primordial soup experiment. His experiment may have possibly shown how life’s building blocks here on earth may have formed. In the experiment he subjected a gaseous mixture of hydrogen, water, methane, and ammonia to an electric discharge for one week. Instead of him showing everyone that spontaneous generation was possible, his primordial soup showed him that it was not. Miller made sure that there was no oxygen in his design, but all throughout life there has been oxygen present.
1. Fresh water comes from ice sheets, ice caps, glaciers, icebergs, lakes, rivers and stream. They also come from underground sources like; groundwater in aquifers and underground streams. The water in glaciers and ice caps is frozen. Only 3% of the water on the planet is fresh. The water all has something to do the water cycle. First you've got evaporation; water becomes water vapour and changes into a gas. Then there is condensation and the water vapour becomes a cloud. The last one is precipitation, this is rain, snow, etc. (to be continued)