According to readings from the Mauna Loa Observatory, CO2 concentrations in May 2013 exceeded ________ for the first time during the last 800,000 years
A) 100-ppm B) 200-ppm C) 300-ppm D) 400-ppm E) 500-ppm
D
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Water molecules stick to each other due to what weak form of chemical bond
A. Ionic Bond 1. B. Covalent Bond C. Hydrogen Bond D. Ionic Bond
A wet-looking road surface on a clear, hot, dry day is an example of a ____
A) mirage B) halo C) Fata Morgana D) parhelia
In _______________ conditions, groundwater will seep into a stream
Fill in the blank(s) with correct word
Fires on the Cuyahoga River raised concerns that contributed to ________
A) the formation of the U.S. Food and Drug Administration B) the passage of the federal Water Pollution Control Act C) a regulatory taking of many of the industries along the river and its tributaries D) laws requiring the separation of sewage and storm water in cities E) the passage of the Federal Water Pollution Control Acts and the Clean Water Act