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ozonelayer
ozone layer
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The answer OZONELAYER (ozone layer) has 21 possible clue(s) in existing crosswords.
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The word OZONELAYER (ozone layer) is NOT valid in any word game. (Sorry, you cannot play OZONELAYER (ozone layer) in Scrabble, Words With Friends etc)
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Definitions of ozone layer in various dictionaries:
noun - a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
OZONE LAYER - a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
OZONE LAYER - The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains high concentra...
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Possible Jeopardy Clues |
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An environmental revolution was ignited in the '80s after scientists discovered a "hole" in this |
Without this endangered layer of the atmosphere, you'd get a real bad sunburn |
In September 1992 the so-called hole in this layer over Antarctica measured 8.9 million square miles |
12 to 30 miles up, this atmospheric "layer" largely in the stratosphere protects us from the full force of ultraviolet rays |
In September 2000 it was disclosed that the hole in this had spread to about 11 million square miles |
The hole in this develops every spring over Antarctica & lasts for a few months |
Over 90 nations have agreed to a total ban on CFCs by the year 2000 to protect this atmospheric layer |
Ozone layer description |
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The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains high concentrations of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth's atmosphere as a whole is about 0.3 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometers (12 to 19 mi) above Earth, although its thickness varies seasonally and geographically.The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson. Measurements of the sun showed that the radiation sent out from its surface and reaching the ground on Earth is usually consistent with the spectrum of a black body with a temperature in the range of 5,500–6,000 K (5,227 to 5,727 °C), except that there was no radiation below a wavelength of about 310 nm at the ultraviolet end of the spectrum. It was deduced that the missing radiation was being absorbed by something in the atmosphere. Eventually the spectrum of the missing radiation was matched to only one known chemical, ozone. Its properties were explored in detail by the British meteorologist G. M. B. Dobson, who developed a simple spectrophotometer (the Dobsonmeter) that could be used to measure stratospheric ozone from the ground. Between 1928 and 1958, Dobson established a worldwide network of ozone monitoring stations, which continue to operate to this day. The "Dobson unit", a convenient measure of the amount of ozone overhead, is named in his honor. * The ozone layer absorbs 97 to 99 percent of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.In 1976 atmospheric research revealed that the ozone layer was being depleted by chemicals released by industry, mainly chlorofluorocarbons (CFCs). Concerns that increased UV radiation due to ozone depletion threatened life on Earth led to bans on the chemicals, and the latest evidence is that ozone depletion has slowed or stopped. The United Nations General Assembly has designated September 16 as the International Day for the Preservation of the Ozone Layer. * Venus also has a thin ozone layer at an altitude of 100 kilometers from the planet's surface. |