Which action is responsible for leaving the largest areas of topsoil unprotected and thus vulnerable to erosion?
A. agriculture
B. flooding
C. windstorms
D. volcanoes
Answer: A
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Oceanic lithosphere is approximately ________ thick in deep-ocean basins
A) 75 kilometers B) 100 kilometers C) 150 kilometers D) 200 kilometers
How does the presence of silica affect the temperature and viscosity of magma?
What will be an ideal response?
A nerve gas such as sarin does which of the following?
A) causes a decrease in acetylcholine B) irreversibly inhibits acetylcholinesterase C) reversibly inhibits acetylcholinesterase D) reacts directly with acetylcholine
One of the most prominent surface features of Europe is an undulating or rolling, plain that extends without a break from near the French-Spanish border, across western and northern France, central and northern Belgium, the Netherlands, Denmark, northern Germany, Poland, and far into Russia, known as the __________ __________ __________
Fill in the blank(s) with correct word