Solids in wastewater treatment are removed in ________
A) tertiary treatment
B) secondary treatment
C) primary treatment
D) pretreatment
E) sludge digestion
D
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Describe how the Earth's ocean accumulated. What aspects of the initial atmospheric conditions prohibited the formation of liquid water? Once in place, how did the water become saline?
The tropical monsoon climate is different from the tropical rainforest because it has ____
a. a short dry season b. its coolest month averaging above 18°C (64.4°F) c. forest cover as natural vegetation d. climate regions in Africa, Asia, and South America e. much cooler temperatures
The petroleum window is the depth between ________ to ________ feet through which sapropel must pass to transform into oil.
A. 100; 600 B. 10,000; 20,000 C. 500; 6000 D. 100; 1000 E. 7,500; 15,000