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 out of the blood and uses it in the body's cells. The cells use
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)
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.
Depression is one of the most common psychological problems, affecting nearly everyone through either personal experience or through depression in a family member. The cost in human suffering cannot be estimated. Depression can interfere with normal functioning, and frequently causes problems with work, social and family adjustment. It causes pain and suffering not only to those who have a disorder, but also to those who care about them. Serious depression can destroy family life as well as the life of the depressed person.
oxygen. Before I do this I must do a preliminary plan to see what my
Earth is the element of life found here because with the sun, earth nurtures all plants and
There is a global shortage of drinking water. A person might wonder how this can be if seventy percent of the earth’s surface is covered by water. Most of the Earth’s water is unsuitable for human consuption. Ocean water is salt water, which makes up 97.5% of all water on the planet. Freshwater is only 3.5% of all the water on Earth. Drinking water is sourced from bodies of freshwater.
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!
Mainstream media such as television, radio, newspapers were the primary source of reliable information before the epoch of the internet. However, the situation has changed. The evolution of modern technology in the world today has led to the continuous increase in the methods of practicing journalism. Social and technological advancements have not only improved the pace and content of this field’s practice, but has extended its genre to online or cybernetic journalism. (Project for Excellence in Journalism, 2007). News websites most of which are owned by major media companies and alternative websites with user generated content such as social networking sites and blogs are gaining grounds in the journalism field of practice. (Nel, n.d). One of the chief forces affecting the practice of journalism nowadays is online citizen journalists. Nel (n.d) defines citizen journalism as “individuals playing an active role in the process of collecting, reporting, analysing and disseminating news and information”. He further adds that “citizen journalism is slowly being looked upon as a form of rightful democratic ways of giving hones news, articles, etc, directly by citizens of the world from anywhere.” One of the major researches conducted in the field of citizen journalism, describes the phenomenon as “individuals who intend to publish information online, meant to benefit a community”, and this information is expected to benefit the audience or the wider population in making decisions for the improvement of their community. (Carpenter, 2010.)
The effects that depression has on someone can truly be devastating. There are a lot of minor effects of depression, but there are also a magnitude of major effects that know how to change a person’s life. A couple of the minor effects may be low self-confidence, being sad most of the time and unexpected mood changes. The major symptoms have a severe negative effect on someone’s life and their body. So dreadful that can drive them insane, they begin to harm themselves by consuming unhealthy substances such as drugs and alcohol. Depression often drives people to commit suicide. Also their lack of self-convince pushes someone to not value their life and kill themselves to escape from a life that has no longer meaning to them. As well, they cut themselves, they think the pain of the wound will make them feel better and they think of it as an alternative way to deal with their problems.
Depression is very common around the world today; millions of people are diagnosed with depression every year in America. There are many effects of this disease, some more serious than others. Depression can be linked to many different events that happen to a person to make them moderately to severely depressed. This disease can be very dangerous and sometimes fatal depending on how bad it is. However, some people think that depressed and suicidal people never show signs of their intention when, in general, they give off MANY signs that people tend to notice after the death.
The sun makes the water evaporate in the sea and in lakes, which rises and thus is
borate) and 1.0 g. of sodium hydroxide in 20 mL of warm water. It may