How is stratospheric ozone formed and broken down?
In the stratosphere, the process begins with an oxygen molecule (O2 ) being broken apart by ultraviolet radiation from the Sun. In the lower atmos phere (troposphere), ozone is formed by a different set of chemical reactions that involve naturally occurring gases and those from pollution sources.
Why is stratospheric ozone considered to be a good thing?
Stratospheric ozone is a naturally-occurring gas that filters the sun's ultraviolet (UV) radiation. This is typically regarded as 'good' ozone since it reduces the harmful effects of ultraviolet (UV-B) radiation. A diminished ozone layer allows more radiation to reach the Earth's surface.
Is stratospheric ozone renewable?
In fact, ozone is made so rapidly in the upper atmosphere that the entire amount destroyed in the annual Antarctic ozone hole (up to 70 percent of what was there) is entirely replaced long before the next hole develops. "Ozone," as Stolarski puts it, "is a renewable resource."
How is ozone formed in stratosphere 10?
Complete answer: Ozone is formed in the stratosphere naturally by solar ultraviolet radiations (UV) and oxygen molecules. It makes up about 21% of our atmosphere. These reactions take place continuously whenever solar radiation is falling on them due to which the largest amount of ozone is formed in this layer itself.
What is good ozone?
Called stratospheric ozone, good ozone occurs naturally in the upper atmosphere, where it forms a protective layer that shields us from the sun's harmful ultraviolet rays.
What is the difference between good and bad ozone?
"Bad" ozone is found in the troposphere, the layer nearest the ground. Tropospheric ozone is a harmful pollutant which forms when sunlight alters various chemicals emitted by humans. "Good" ozone forms in the stratosphere, the next higher layer where some jet planes fly.
What is meant by good ozone?
Called stratospheric ozone, good ozone occurs naturally in the upper atmosphere, where it forms a protective layer that shields us from the sun's harmful ultraviolet rays.
Where is the good ozone?
stratosphere The troposphere generally extends to a level about 6 miles up, where it meets the second layer, the stratosphere. The stratosphere or “good” ozone layer extends upward from about 6 to 30 miles and protects life on Earth from the sun's harmful ultraviolet (UV) rays.
How can we improve the ozone layer?
Avoid the consumption of gases dangerous to the ozone layer, due to their content or manufacturing process. Some of the most dangerous gases are CFCs (chlorofluorocarbons), halogenated hydrocarbon, methyl bromide and nitrous oxide. Minimize the use of cars. The best transport option is urban, bicycle, or walking.
Where does most stratospheric ozone develop?
the stratosphere Most atmospheric ozone is concentrated in a layer in the stratosphere, about 9 to 18 miles (15 to 30 km) above the Earth's surface (see the figure below). Ozone is a molecule that contains three oxygen atoms. At any given time, ozone molecules are constantly formed and destroyed in the stratosphere.
What is the difference between good ozone and bad ozone?
Stratospheric ozone is “good” because it protects living things from ultraviolet radiation from the sun. Ground-level ozone, the topic of this website, is “bad” because it can trigger a variety of health problems, particularly for children, the elderly, and people of all ages who have lung diseases such as asthma.
How is ozone layer formed at the higher level of atmosphere?
Ozone at the higher levels of the atmosphere is a product of UV radiation acting on oxygen (O2) molecule. The higher energy UV radiations split apart some molecular oxygen (O2) into free oxygen (O) atoms. These atoms then combine with the molecular oxygen to form ozone as shown.
What is the difference between good ozone and bad ozone Class 10?
Q. Bad ozone forms in —– and is harmful, while good ozone forms in stratosphere and blocks UV radiations.
How and where is good ozone produced?
Ozone occurs both in the Earth's upper atmosphere and at ground level. Ozone can be good or bad, depending on where it is found. Called stratospheric ozone, good ozone occurs naturally in the upper atmosphere, where it forms a protective layer that shields us from the sun's harmful ultraviolet rays.
What is happening to the good ozone?
Ozone is produced naturally in the stratosphere. But this “good” ozone is gradually being destroyed by man-made chemicals referred to as ozone-depleting substances (ODS), including chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, and methyl chloroform.
What is good ozone layer?
The stratosphere or “good” ozone layer extends upward from about 6 to 30 miles and protects life on Earth from the sun's harmful ultraviolet (UV) rays.
Can we repair the ozone layer?
On the mend Around 99 per cent of ozone-depleting substances have been phased out and the protective layer above Earth is being replenished. The Antarctic ozone hole is expected to close by the 2060s, while other regions will return to pre-1980s values even earlier.
What is the difference between helpful and harmful ozone?
Helpful ozone exists naturally high above the Earth's surface and protects us from the sun's ultraviolet rays (radiation). Human-made air pollutants damage the helpful ozone. Harmful ozone is close to the ground.
How is ozone formed in the troposphere?
Tropospheric ozone is formed by the interaction of sunlight, particularly ultraviolet light, with hydrocarbons and nitrogen oxides, which are emitted by automobile tailpipes and smokestacks. In urban areas, high ozone levels usually occur during warm summer months.
How is ozone both beneficial and damaging How is ozone formed at the higher levels of atmosphere?
Solution : Ozone is present at higher levels in the atmosphere. It is beneficial as, it shields the earth. s surface from harmful ultraviolet (UV) radiations from the Sun. These radiations are extremely harmful to organisms as it causes skin cancer in human beings.
How is ozone formed in the upper atmosphere give equation to support your answer?
Ozone in upper layer of atmosphere formed by the chemical reaction using ultraviolet rays, that is, sunlight. O2+2O—O3.
What is the difference between stratospheric ozone and tropospheric ozone?
Unlike stratospheric ozone, which forms naturally in the upper atmosphere and protects us from the sun's harmful ultraviolet rays, ground-level (or tropospheric) ozone is created through the interactions of man-made (and natural) emissions of volatile organic compounds and nitrogen oxides in the presence of heat and …
Is the earth healing?
Our living planet is incredibly resilient and can heal itself over time. The problem is that its self-healing systems are very, very slow. The Earth will be fine, but humans' problems are more immediate. People have damaged the systems that sustain us in many ways.
Can we artificially create ozone?
It is however less known that ozone can be artificially produced, so that it can be used for water treatment. Ozone generators can create ozone artificially by means of extremely high voltages or by means of UV-light. Both methods involve the decomposition of the oxygen molecule. This causes oxygen radical formation.
How is the good ozone gradually being destroyed?
Ozone is produced naturally in the stratosphere. But this “good” ozone is gradually being destroyed by man-made chemicals referred to as ozone-depleting substances (ODS), including chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, and methyl chloroform.
How is ozone formed in the upper atmosphere state its importance class 10?
Ozone is formed in the atmosphere when energetic ultraviolet (UV) radiation dissociates molecules of oxygen (O2) into separate oxygen atoms. Free oxygen atoms can recombine to form oxygen molecules but if a free oxygen atom collides with an oxygen molecule, it joins up, forming ozone.
How is ozone formed in the upper atmosphere What causes its damage class 10?
Ozone is formed in upper atmosphere by the reaction of ultraviolet UV radiations on oxygen O2 molecule. The damage to ozone layer is a cause of concern to us as due to its damage more ultraviolet rays reach the earth's surface causing various health hazards.
Can the ozone regenerate?
Around 99 per cent of ozone-depleting substances have been phased out and the protective layer above Earth is being replenished. The Antarctic ozone hole is expected to close by the 2060s, while other regions will return to pre-1980s values even earlier.
How long can we live on Earth?
The upshot: Earth has at least 1.5 billion years left to support life, the researchers report this month in Geophysical Research Letters. If humans last that long, Earth would be generally uncomfortable for them, but livable in some areas just below the polar regions, Wolf suggests.
Can we rebuild the ozone layer?
On the mend Around 99 per cent of ozone-depleting substances have been phased out and the protective layer above Earth is being replenished. The Antarctic ozone hole is expected to close by the 2060s, while other regions will return to pre-1980s values even earlier.