Atmospheric concentration of ozone found at an altitude of 10 to 50 kilometers above the Earth's surface. This layer is important to life on the Earth because ozone absorbs harmful ultraviolet radiation.

Ozone gas occurs naturally in the upper atmosphere where it forms a layer that protects the Earth's surface by absorbing a large amount of harmful UV radiation.

An area of the stratosphere, approximately 15 to 60 kilometers (9 to 38 miles) above the earth, where ozone is found as a trace gas (at higher concentrations than other parts of the atmosphere). This relatively high concentration of ozone filters most ultraviolet radiation, preventing it from reaching the earth.

A layer in the stratosphere that contains about ninety percent of Earth's ozone. The ozone layer occurs approximately twenty-five kilometers (sixteen miles) above the surface of Earth.

a part of the Earth's atmosphere, almost 20 miles up in the sky, that contains ozone. Ozone blocks harmful radiation from the Sun so that it will not reach the Earth.

A layer in the atmosphere around the earth that blocks UVC radiation.

A naturally occurring layer of gas (O3) which protects our planet surface from harmful ultraviolet radiation and makes life on earth possible

The region of the stratosphere containing the bulk of atmospheric ozone. The ozone layer lies approximately 15-40 kilometers (10-25 miles) Ultra violet radiation levels, which in turn will cause increased skin cancers and cataracts and potential damage to some marine organisms, plants, and plastics. (Source: US Environmental Protection Agency, 1999b).

a naturally occurring layer of gas in the upper atmosphere which protects the earth by filtering the sun's ultraviolet (UV) radiation. Overexposure to UV rays can lead to skin cancer, cataracts and a weakened immune system

A thin layer of ozone which provides protection from the sun's harmful UV radiation. Ozone consists of three oxygen molecules which in turn break up to form oxygen (with two oxygen atoms) and then form ozone again. The current increase in the occurrence of skin cancer is thought to be due in part to the depletion of the ozone layer. The ozone layer is to be found in the stratosphere at a height of 25 km. In recent years, it has been depleted and has temporarily disappeared in certain areas — primarily around the Poles. Ozone molecules are broken down by natural gases like methane and nitrous oxide (laughing gas) and by chlorine and bromine compounds (CFC, HCFC and halogens).

An area of the stratosphere, about 20 to 50 kilometers in altitude, where the intensity of short-wavelength ultraviolet light from the sun (between 130 and 200 nanometers) is sufficiently high to convert normal diatomic oxygen (O2) to ozone (O3). The ozone thus formed provides a measure of protection to plant and animal life on the surface of the Earth because it absorbs ultraviolet radiation at wavelengths that are mutagenic (about 250 to 270 nanometers).

A region in the stratosphere 12 to 35 miles up where the air is very cold and thin, and ozone is found in high concentrations. The ozone layer is continually replenished by solar radiation and screens out about 95 to 99% of the sun's ultraviolet radiation

layer of Earth's atmosphere at about 20 to 30 miles, marked by a high ozone (O3) content.

A region, straddling the boundary between the stratosphere and the mesosphere (in other words, near the stratopause), where the absorption of ultraviolet radiation by ozone substantially heats the atmosphere. In percentage terms, the greatest concentration of ozone, and therefore the greatest heating of the atmosphere, is near the stratopause. However, because the atmosphere becomes denser as you near the surface of the Earth, the actual number of ozone molecules is greatest near the middle of the stratosphere. As a result, graphs showing the concentration of ozone molecules in percentage terms, or the heating of the atmosphere by ozone, will have a peak at the top of the stratosphere, whereas graphs which show the concentration of ozone in terms of molecular numbers will have a peak near the middle of the stratosphere.

something of a misnomer, since ozone does not occur in a flat “layer” in the atmosphere. This term refers to ozone in the stratosphere where it occurs in its highest concentrations — roughly from 1 to 10 parts per million. This atmospheric zone lies between 15 and 50 kilometers above Earth's surface, depending upon latitude, season, and other factors.

a layer of ozone in the stratosphere which provides protection for the earth from solar ultraviolet radiation

the layer of gases that prevents dangerous rays from the sun from reaching the Earth..... return

This is the scattered layer of ozone molecules found in the stratosphere located 13 to 55 kilometers above the earth's surface. The ozone layer partially filters out certain wavelengths of UV radiation from the sun, preventing these rays from reaching the earth.

Thin layer of ozone that encircles the earth’s stratosphere and protects the earth from the full force of the sun’s ultraviolet rays.

The region of concentration of ozone molecules located in the stratosphere at an altitude of 15 to 35 kilometres that shields all biological life forms on Earth from most of the sun's ultraviolet radiation.

The part of the stratosphere lying between 10 and 50 km above the earth's surface which has a considerable ozone concentration, which is at a maximum between 20 and 25 km. It plays an important role in the radiation balance of the atmosphere.

Ozone in the upper atmosphere (the ozone layer) protects us from harmful ultra-violet radiation from the sun. Certain chemicals, such as CFCs, deplete the ozone creating 'holes' in the ozone layer. The Montreal Protocol is an international agreement restricting the production of CFCs to protect the 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

Most of the ozone in the atmosphere is in the stratosphere (about 10 - 50 km above earth's surface). This is what is called the ozone layer or the stratospheric ozone layer. The layer refers to the thickness of the ozone.

A layer in the stratosphere, at an altitude of approximately 10 to 50 km, where a relatively strong concentration of ozone shields the earth from excessive ultraviolet radiation.

A layer of ozone high up in the atmosphere, which shields us from the harmful rays of the Sun.

a layer of atmospheric gases located in the stratosphere (9 to 30 miles above the earth's surface). The ozone layer protects life on earth by filtering out harmful, cancer-causing ultraviolet radiation from the sun.

Scattered molecules of ozone gas that collect in the upper atmosphere of the earth in a layer that shields the earth from excessive ultraviolet light.

ozone in the stratosphere where it occurs in its highest concentrations—roughly from 1 to 10 parts per million. This atmospheric zone lies between 15 and 50 kilometers above the Earth's surface, depending on latitude, season, and other factors. The term “ozone layer” is somewhat of a misnomer, since ozone does not occur in a flat layer in the atmosphere.

A stratospheric layer composed of a form of oxygen with three atoms to the molecule, 03. Ozone forms from 6 to 35 (reports vary as to the number) miles above the earth when highenergy ultraviolet light in sunlight strikes oxygen molecules, splitting them into oxygen atoms, which when free attach themselves to other oxygen molecules. A potential effect of the loss of this protective layer could be a sharp rise in the incidence of skin cancer. An unrelated ozone problem occurs as ground-level ozone or smog, a respiratory-irritant pollutant, which forms in a series of chemical reactions when urban air pollutants react in sunlight and oxygen.

The layer of the upper atmosphere in which a concentration of ozone absorbs a significant amount of potentially hazardous ultraviolet radiation.

the natural layer of ozone located in the stratosphere. Here, it protects the earth from the harmful effects of the sun's ultraviolet radiation by absorbing much of it. (See also Ozone, Ground-level ozone.)

A layer of air in the atmosphere that contains a relatively high concentration of the gas ozone

A stratospheric layer that absorbs much of the harmful ultraviolet rays that would otherwise reach the earth. Chemicals such as CFCs (see CFCs) can react in the stratosphere to reduce the effectiveness of the ozone layer.

Go to Environmental Molecules A layer of the atmosphere between 10 and 40 km above the earth’s surface, called the stratosphere, where ozone molecules absorb dangerous ultraviolet radiation from the sun.

The protective layer in the atmosphere, about 15 miles above the ground, that absorbs some of the sun's ultraviolet rays, thereby reducing the amount of potentially harmful radiation reaching the earth's surface.

a layer of ozone that shields the earth from the sun's ultraviolet light

the region of the stratosphere containing the bulk of atmospheric ozone. The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere. Depletion of this layer by several chemicals produced through human activities will lead to higher UVB levels, which in turn will cause increased skin cancers and cataracts and potential damage to some marine organisms, plants, and plastics. The science section of EPA's ozone depletion Web site offers much more detail on the science of ozone depletion.

A layer of ozone in the lower portion of the stratosphere - 12 to 15 miles above the Earth's surface - which helps to filter out harmful ultraviolet rays from the sun. It may be contrasted with the harmful ozone component of photochemical smog near the Earth's surface.

Atmospheric layer at heights of approximately 32 to 48 km. High ozone concentrations block most solar ultraviolet radiation from entry into the lower atmosphere.

A thin layer in the atmosphere surrounding the Earth that shields us from most of the sun's ultraviolet light rays.

a layer of ozone in the stratosphere (10-30 miles from earth) which filters out ultraviolet rays from the sun which are harmful to humans. Rays that cause skin cancer.

A layer of gases in the atmosphere that protects the earth from the sun's harmful ultraviolet radiation.

a region in the stratosphere where there is a small, but significant, amount of ozone

A gas layer in the upper atmosphere that acts as a natural filter blocking UV rays from the sun.

layer of Earth’s atmosphere that shields the planet from the Sun’s harmful rays

a region of the upper atmosphere, between about 15 and 30 kilometers in altitude, containing a relatively high concentration of ozone that absorbs solar ultraviolet radiation.

The area in the stratosphere where most of the earth's ozone is located which is usually between 20 and 30 kilometers above the earth's surface.

The ozone in the stratosphere is very diffuse, occupying a region many kilometres in thickness, but is conventionally described as a layer to aid understanding.

A layer in the Earth's upper atmosphere, the stratosphere that contains almost 90% of the Earth's ozone. This forms a protective blanket against the harmful ultra-violet rays coming form the sun.

Ozone that is formed in the stratosphere from the conversion of oxygen molecules by solar radiation. Ozone absorbs much ultraviolet radiation and prevents it from reaching the Earth.

A form of oxygen (O3) formed naturally in the upper atmosphere by a photochemical reaction with solar ultraviolet radiation and a major agent in the formation of smog. Couche d'ozone

A region of the upper atmosphere, containing a relatively high concentration of ozone that absorbs solar ultraviolet radiation in a wavelength range not screened by atmospheric components.

A layer of ozone gas in the stratosphere that shields the Earth from most of the harmful ultraviolet radiation coming from the Sun.

A layer of ozone found in the stratosphere, where it absorbs harmful ultra violet radiation

A part of the earthâ€(tm)s atmosphere that helps protect the planetâ€(tm)s surface from the sunâ€(tm)s potentially harmful ultraviolet radiation.

A layer of ozone 12 to 15 miles above the earth's surface which helps to filter out harmful ultraviolet rays from the sun. It may be contrasted with ground-level ozone, which exists at the earth's surface and is a harmful component of photochemical smog. A primary concern is that compounds such as chlorofluorocarbons (CFCs), used in air conditioning systems, are depleting the ozone layer.

Layer of gaseous ozone in the stratospheric atmosphere that protects life on earth by filtering out harmful ultraviolet radiation from the sun

region of the stratosphere lying roughly between 15 and 40 km above the Earth's surface. It contains most of the atmospheric ozone, which is constantly being created and destroyed through natural chemical cycles. The layer is critical to life on Earth because it filters out damaging ultraviolet radiation from the Sun.

An atmospheric layer that contains a high proportion of oxygen that exists as ozone. It acts as a filtering mechanism against incoming ultraviolet radiation. It is located between the troposphere and the stratosphere, around 9.5 to 12.5 miles (15 to 20 kilometers) above the earth's surface.

The ozone layer is a region of the stratosphere which contains most (about 90%) of the Earth's atmospheric ozone. It is about10-25 miles (15-40 km) above the Earth's surface. The ozone layer shields the Earth from Ultraviolet B rays that come from the Sun. The ozone layer is becoming depleted, and there is an "ozone hole" over Antarctica. EnchantedLearning.com Rock and Mineral Dictionary Click on an underlined word for more information on that subject. If the rock or mineral term you are looking for is not in the dictionary, please e-mail us and we'll add it. Enchanted Learning® Over 20,000 Web Pages. Sample Pages for Prospective Subscribers