How do chemicals get into and pollute ground water? Give some examples
What will be an ideal response?
Herbicides, chemical spills, sewage from septic systems, gasoline from leaking underground storage tanks. The greatest risk of pollution comes when wells begin to draw the water from the aquifer and transport the contaminated water towards the well. A solution is to drill to a deeper aquifer.
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_______________ is an informal term that encompasses all geologic time from 4.6 to 4.0 billion years ago
Fill in the blank(s) with correct word
A(n) ________ is a bowl-shaped depression caused by a meteorite striking the Earth's surface
Fill in the blank(s) with correct word
This diagram shows magnetic stripes on either side of the mid-ocean ridge. How many different ages of stripes are represented in this diagram?
A. 3 B. 11 C. 6 D. 2 E. 4
Worldwide, the most widely used source of renewable energy for generating electricity is ________
A) wind B) nuclear C) hydroelectric D) biomass E) solar