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Published byLouise Kelly Modified over 9 years ago
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Composition of the Atmosphere
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Vocabulary Matter Atmosphere Cellular respiration Use your book on page 252 to find the definitions
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Atmosphere is composed of chemical elements including Nitrogen (N) Oxygen (O) Argon
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Atmosphere is composed of chemical compounds including: Carbon Dioxide (C0 ) Water Vapor Levels of water vapor vary with evaporation and precipitation (rain, snow) Moist air may contain up to 4% water vapor Dry air may contain as little as 1% water vapor
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The atmosphere also contains ozone Ozone is a form of oxygen consisting of three oxygen molecules Protects the earths inhabitants from harmful ultraviolet rays by absorbing them
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Atmosphere also contains atmospheric dust which includes: Mineral particles lifted from soil by winds Ashes from fires Volcanic dust Microscopic organisms Sea spray-salt The larger particles fall due to their weight but many smaller, lighter particles remain in the atmosphere for months
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