Flood basalts from the ____________________ ____________________ could have depleted ozone levels and
contributed to the Permian mass extinction. Fill in the blank(s) with the appropriate word(s).
Siberian Traps
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The United States subsidizes mining companies through depletion allowances that amount to ____% of their gross income from mining and processing.
A. 2?4 B. 5?22 C. 30?44 D. 62?75 E. 83?95
Gasoline prices have doubled in a large Midwestern city and may continue to rise in the future. What may happen in this situation?
A) People who live in the suburbs will want larger vehicles to drive. B) People who live in the suburbs may press local politicians and city planners to develop better mass transit for the area. C) People who live in the suburbs will become active supporters of increased mass transit options. D) Some people who live in the suburbs will search for new places to live closer to where they work. E) B, C, and D may all take place in this situation.
The fact that Venus and Mars both have mountain ranges and volcanoes demonstrates that ____.
Fill in the blank(s) with the appropriate word(s)
Streams generally receive their water from two sources. What are those two sources?
A) Lakes and meteorites B) Meteorites and comets C) Overland flow and groundwater D) Groundwater and evaporation