Which of the following regulates the discharge of wastes into rivers and streams?
A) Safe Drinking Water Act
B) Toxic Substances Control Act
C) Clean Rivers Act
D) Clean Water Act
E) Soil and Water Conservation Act
Answer: D
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In a region with seasonal drought, occasional fires, and grazing by large herbivores, you would most likely find a
A. forest. B. grassland. C. desert. D. volcanoes. E. sand dunes.
Large crystals present in otherwise fine-grained volcanic rock are called:
a) Matrix b) Megacrysts c) Porphyroblasts d) Macrolithons e) Phenocrysts
Most desert streams are ephemeral
a. True b. False Indicate whether the statement is true or false
Which of the following best describes how geysers erupt?
A) Water below the water table slowly boils in a vertical crack or natural conduit, causing a plume of condensed water vapor to rise above the vent. B) Water slowly boils in a network of vertical cracks above the water table, sending up a plume of steam and hot water. C) Water suddenly boils in disconnected voids and cracks above the water table, causing the aquifer to explosively fragment. D) With a slight reduction in pressure, water in a saturated, natural conduit suddenly boils, sending a plume of steam and hot water into the air above the vent.