A playa is an intermittent lake on the floor of a desert valley
Indicate whether the statement is true or false
TRUE
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Glaciers are like dirty snowballs because they
A. are round. B. roll like a ball. C. are always melting. D. consist of debris embedded in ice.
Algeria and Tunisia are predicted to have no unmet water demand in the decade 2020-2030
Indicate whether the statement is true or false
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
Changes in Earth's elliptical orbit around the Sun (eccentricity) varies over a ________ year cycle
A) 100,000 B) 175,000 C) 12.000 D) 41,000 E) 26,000