15 Results
(Movie/Animation, Audio/Visual (3))
Topics associated with the atmosphere include atmospheric pressure, pollution and the role of ozone.
Ozone: Absorbance of UV Light   
(Movie/Animation, Audio/Visual (3))
Ozone is produced. Exposure to a shortwave ultraviolet source causes the ozone to cast a shadow against a fluorescent yellow background.
Atmospheric Pollution   
(Movie/Animation, Audio/Visual (3))
The formation and effects of acid rain and other pollutants are simulated.
Atmospheric Pressure   
(Movie/Animation, Audio/Visual (2))
Atmospheric pressure is used to collapse large and small metal containers.
Special_Topics : SmogFormation (20 Variations)   
(Assessment Material (1))
In which of the following scenarios is the formation of photochemical smog most likely?
Special_Topics : OzoneDepletion (8 Variations)   
(Assessment Material (1))
Use the EPA Web site to answer the following question.

Which of the following ozone depleting compounds would be the least harmful substance to the ozone layer?

Special_Topics : GeneralOzone (17 Variations)   
(Assessment Material (1))
Which of the following statements is not an accurate description of the roles ozone plays in the atmosphere?
Special_Topics : RainFallpH (20 Variations)   
(Assessment Material (1))
The rainfall in central Wisconsin has a pH of 4.8 (National Atmospheric Deposition Program). Take a look at the EPA webpage Effects of Acid Rain: Lakes & Streams. This site has a chart of the pH at which several aquatic species begin to suffer. Determine which of the following species will be most affected by rainfall of this acidity if the lakes and streams in central Wisconsin aren't buffered enough to neutralize some of the acid. (There may be more than one correct answer.)
Special_Topics : GeneralAcidRain (20 Variations)   
(Assessment Material (1))
Which of the following statements about acid rain is the most correct?
Special_Topics : AirPollutants (20 Variations)   
(Assessment Material (1))
Which of the following air pollutants can be described as a photochemically active free radical that contributes to acid rain and respiratory irritation?
(Article (36))
Volume 04, issue 03 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
The Air   
(Article (36))
Volume 05, issue 09 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Importance of Air   
(Article (33))
Volume 03, issue 08 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Molecular Models of Volatile Organic Compounds   
(Article (1))
This month's Featured Molecules come from the Report from Other Journals column, Nature: Our Atmosphere in the Year of Planet Earth, and the summary found there of the paper by Lelieveld et al. (1, 2) Added to the collection are several volatile organic compounds (VOCs) that are emitted by a variety of plants. The term VOCs is a common one in environmental chemistry, and is interpreted quite broadly, typically referring to any organic molecule with a vapor pressure sufficiently high to allow for part-per-billion levels in the atmosphere. Common VOCs include methane (the most prevalent VOC), benzene and benzene derivatives, chlorinated hydrocarbons, and many others. The source may be natural, as in the case of the plant emissions, or anthropogenic, as in the case of a molecule such as the gasoline additive methyl tert-butyl ether (MTBE).The oxidation of isoprene in the atmosphere has been a source of interest for many years. Several primary oxidation products are included in the molecule collection, although a number of isomeric forms are also possible (3).The area of VOCs provides innumerable topics for students research papers and projects at all levels of the curriculum from high-school chemistry through the undergraduate courses in chemistry and environmental science. Along the way students have the opportunity for exposure to fields such as epidemiology and toxicology, that may be new to them, but are of increasing importance in the environmental sciences. The MTBE story is an interesting one for students to discover, as it once again emphasizes the role that unintended consequences play in life. An exploration of the sources, structures, reactivity, health and environmental effects and ultimate fate of various VOCs reinforces in students minds just how interconnected the chemistry of the environment is, a lesson that bears repeating frequently.
Water on Mars   
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.