Which one of the following aquifers would be best for purifying groundwater that is contaminated with harmful sewage bacteria?
A. coarse gravel with few small grains
B. sand
C. highly fractured granite
D. cavernous limestone
Answer: B
Environmental & Atmospheric Sciences
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Between 1.3 and 1.0 billion years ago, the Grenville orogeny occurred in the supercontinent __________
Fill in the blank(s) with correct word
Environmental & Atmospheric Sciences
________ works with the natural topography to reduce soil erosion
Fill in the blank(s) with correct word
Environmental & Atmospheric Sciences
Igneous rocks may be either ________ if they form on or near Earth's surface, or ________ if they solidify under ground.
A. plutonic; intrusive B. volcanic; extrusive C. extrusive; intrusive D. intrusive; extrusive E. intrusive; volcanic
Environmental & Atmospheric Sciences
Yosemite National Park, with its granite batholith, has deadly ________ on a regular basis.
A. lahars B. debris flows C. mudflows D. creep events E. rockfalls
Environmental & Atmospheric Sciences