|..and God saw creation was good||Science|
Oxygen is an odorless, colorless gas when at the standard pressure and temperature. Oxygen condenses at -297.4F (-183.0C) to a pale blue liquid (liquid oxygen) and upon further cooling, freezes at -361.9F (-18.8C).
Oxygen makes up about 65% of the mass of the adult body - most of this is in the form of water.
Earth's Oxygen cycle
Plants are the primary creators of atmospheric oxygen through the process of photosynthesis. Oxygen is used and cycled by plants.
The cycling of carbon and oxygen is interconnected. Plants uses carbon dioxide (CO~2~) and sunlight to convert and release energy and oxygen. Humans and animals breathe in oxygen and then breathe out carbon dioxide - plants then use this carbon dioxide to restart the perpetual cycle.
Processes That Use Oxygen
Breathing - During respiration, air passes through the bronchial tubes, or airways, into the lungs for gas exchange, or diffusion, to take place - the exhalation of CO~2~ makes room for the absorption of O~2~.
Decomposing - When animals and plants die, they decompose—this process uses up O~2~ and releases CO~2~.
Rusting - This is also known as oxidation - when things rust they use up O~2~.
Combustion - Three things are necessary for fire: oxygen, fuel, and heat. When things burn, they use O~2~ and replace it with CO~2~. Contrary to popular belief, oxygen is not explosive; nevertheless, patient education is imperative because oxygen accelerates combustion.
Oxygen also makes up ~50% of the mass of the Earth's crust and 21% of the atmosphere (air) - the rest of the atmosphere is mostly nitrogen (78%). The Earth is the only planet in the solar system with a high percentage of oxygen.
Oxygen is critical for chemical reactions that keep the body alive, including the reactions that produce adenosine triphosphate (ATP) - the molecule used for energy. Brain cells are sensitive to a lack of oxygen because of their demand for a high-and-steady production of ATP.
Brain damage is likely within five minutes without oxygen cerebral hypoxia, and death is likely within ten minutes. A steady supply of oxygen is indispensable for cardiac function and viability.
Earth has a high concentration of oxygen gas.
The reason is the oxygen cycle:
Three main oxygen reservoirs on Earth
Life on Earth needs balanced biochem-levels
Do you know why there is oxygen on Earth?|
Photosynthesis is the main driving factor. Without photosynthesis Earth's atmosphere would be very different - not supporting life as we know it. Photosynthesis produces oxygen which rises into the atmosphere. Respiration, chemical reactions as decay remove oxygen from the atmosphere
Oxygen = chemically OOxygen got its name from the Greeks, a long time ago.
Oxygen is highly reactive
Oxygen can form compounds with almost all other elements. Chemists call them oxides.|
When we look at all the masses in our universe, oxygen is the third most abundant element, following hydrogen and helium. By mass Oxygen is the most abundant element in the Earth's crust.
Earth's air contains 20.8 percent diatomic oxygen
Without oxygen proteins, carbohydrates, and fats, bones, teeth, animal shells, would not exist - imagine us without all that... Humans would not exist.
Life on Earth started in Earth's oceans, when cyanobacteria produced O2 Oxygen. Later, algae, green plants and trees produced oxygen with photosynthesis
All cells use oxygen in their cellular respiration.
The onion-like layers of a massive star
Oxygen is part of every star
All elements of a star:
H = Hydrogen
He = Helium
C = Carbon
Ne = Neon
O = Oxygen
Si = Silicon
Fe = Iron
Most of all living organisms contain + need oxygen
Imagine life without amino acids, without neurotransmitters or alkaloids. Life on Earth would be very different!
An adult human, at rest, inhales 1.8 to 2.4 grams of oxygen per minute. This amounts to more than 6 billion tonnes of oxygen inhaled by humanity per year.
At a resting pulse rate, the heart consumes approximately 8-15 ml O2/min/100 g tissue. This is significantly more than that consumed by the brain (approximately 3 ml O2/min/100 g tissue) and can increase to more than 70 ml O2/min/100 g myocardial tissue during vigorous exercise.
Humans, of course, need oxygen.|
We breath in oxygen O
We breath out carbon dioxide CO2
And we are healthier and happier when
there are not too many pollutants in the air!
Life on Earth depends on a good balance - some human decisions unbalance Nature, endangering all life on Earth!
Bear Springs Blossom Nature Conservation Group's mission is to fight for a safer future of our children and grand children.
History of Oxygen
Philo of Byzantium, a Greek writer and engineer in the second century, conducted the first experiment of the relationship between air and combustion. He found that if you take a burning candle on a dish full of water and invert a cylindrical container over it, the surrounding water will rise into the neck of the vessel.
The first discovery of oxygen in the 1600s, by the Polish alchemist Sedziwoj, was not published. Scheele then rediscovered oxygen, followed by Priestly in the 1770s.
Later, the French chemist Lavoisier renamed the compound oxygen because of its ability to form acids. The term oxygen comes from the Greek word 'oxygenes' meaning 'acid producer.'
In the nineteenth century, scientists realized that by compression and cooling, they could liquefy oxygen. By 1891, scientists could produce enough liquid oxygen for research. Four years later, the first process to generate liquid oxygen was commercially viable.
Industrial Use of Oxygen
More than 50% of the Earth's steel production uses the basic oxygen process (BOP), which employs pure oxygen to convert scrap and iron into steel.
Other applications of oxygen in the industrial setting include making or processing new compounds such as plastics, paper, glass, ceramics, pharmaceuticals, and petroleum.
Liquid oxygen is combined with liquid hydrogen to make rocket fuel.
Medicinal Use of Oxygen
Oxygen has various uses in health care-treatment is flexible enough for use in inpatient, outpatient, and in emergency settings. It treats ailments such as heart disorders, pneumonia, and chronic obstructive pulmonary disorders (COPD).
The circulatory system is interconnected with the pulmonary circulation. Treatment not only increases the oxygen saturation of the blood but also can ease cardiac workload.
When providing life support, airway care and rescue breaths improve a person's chance for survival. Other life support use includes oxygen supplementation for astronauts and scuba divers.
Parts of this information was written by Sarah Gehrke, MSN, RN
NASA scientist Hansen's statement:|
"I decided that I didn't want my grand-children to say, 'grandpa understood what was happening but he didn't make it clear, he didn't act .."
This is exactly our motivation and the motivation of BSB members.
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Peter Bonenberger president Bear Springs Blossom
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