what are ozone holes quizlet?
242001
Ozone hole. a thinning part of the ozone layer. A chemical reaction caused by CFC's and other compounds in the atmosphere.
751807
Ozone is a component of the Earth's atmosphere that serves to protect us against the harmful rays of the Sun, while Greenhouse Gases are multiple chemicals that mixes with the ozone layer, and traps heat that should have been dissipated in space, but instead, is reflected back to the surface of the Earth; thus ...
1085514
In the late 1970s, scientists noticed levels of ozone gas (O3) dropping in the ozone layer, a region of the stratosphere some 15 to 30km above our heads. The ozone here absorbs most of the Sun's damaging ultraviolet (UV) radiation, shielding us from UVB and UVC rays.
345306
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.
449246
The ozone hole itself has a minor cooling effect (about 2 percent of the warming effect of greenhouses gases) because ozone in the stratosphere absorbs heat radiated to space by gases in a lower layer of Earth's atmosphere (the upper troposphere).
845524
Ozone depletion is primarily caused by human activities. The main effect of ozone depletion is an increase in UV-B rays reaching the earth's surface. ... CFCs and halons break down into chlorine and bromine which in turn destroy the ozone layer.
803151
Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere. In the first step, solar ultraviolet radiation breaks apart one oxygen molecule (O2) to produce two oxygen atoms (2 O) (see Figure Q2-1).
1134228
Ozone depletion. ... The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (chlorofluorocarbons (CFCs), HCFCs, halons), referred to as ozone-depleting substances (ODS).
925533
The ozone hole is the region over Antarctica with total ozone of 220 Dobson Units or lower.
238943
The ozone layer is a section of the Earth's atmosphere that acts as a barrier between the Earth and UV radiation. The ozone layer protects the Earth from too much radiation by both absorbing and reflecting harmful UV rays.
927287
Ozone in the upper atmosphere, far above the tallest mountains, is beneficial because it absorbs a lot of ultraviolet (UV) radiation, which is harmful to living things. However, ozone is a potent oxidizer, so it is generally not a good thing to breathe. That means that ozone at ground level, where we live, is damaging.
48273
Year-to-year fluctuations in area and depth are caused by variations in stratospheric temperature and circulation. Colder conditions result in a larger area and lower ozone values in the center of the hole. The ozone hole opened the world's eyes to the global effects of human activity on the atmosphere.
564415
The ozone layer is created when ultraviolet rays react with oxygen molecules (O2) to create ozone (O3) and atomic oxygen (O). This process is called the Chapman cycle. Step 1: An oxygen molecules is photolyzed by solar radiation, creating two oxygen radicals: hν+O2→2O.
921344
The ozone layer is a thin part of the Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light. "Ozone holes" are popular names for areas of damage to the ozone layer.
21256
How Can Ozone Be Both Good and Bad? Ozone occurs in two layers of the atmosphere. The layer closest to the Earth's surface is the troposphere. Here, ground-level or "bad" ozone is an air pollutant that is harmful to breathe and it damages crops, trees and other vegetation.
232901
Solution(By Examveda Team) The ozone layer restricts ultraviolet radiation. The Ozone layer which is present in the Earth's atmosphere protects it by restricting from UV or Ultraviolet radiation, the dangerous rays contained by Sun.
160768
In the troposphere, near the Earth's surface, human activities lead to ozone concentrations several times higher than the natural background level. Too much of this ground-level ozone is 'bad' as it is harmful to breathe and also damages vegetation.