About 49% of the Earth's surface is covered by water.
Answer the following statement true (T) or false (F)
False
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Photochemical smog is formed when primary air pollutants interact with ________
A) air B) water C) gases D) sunlight E) moisture
If the maximum temperature for a particular day is 26°C and the minimum temperature is 14°C, the daily mean would be:
A) 20°C. B) 13°C. C) 40°C. D) 12°C. E) The daily mean cannot be determined with the data provided.
An increase in the chlorophyll a content of a seawater sample with time yields a measurement of ________.
A. gross production of organic carbon B. plant respiration C. change in the species of phytoplankton in the sample D. decomposition of plant cells E. net production of organic carbon
What is the name of a vesicular, glassy-textured igneous rock formed from a viscous lava?
A. Volcanic breccia B. Scoria C. Obsidian D. Pumice E. Tuff