The process least likely to conserve soil nutrients is
a. crop rotation
b. fertilizing with compost
c. fertilizing with green manure
d. fertilizing with animal manure
e. irrigation
E
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A car accelerates from rest at 2 m/s2. What is its speed 3 s after the car starts moving?
A) 2 m/s B) 3 m/s C) 4 m/s D) 6 m/s E) none of the above
What is an effect of a volcano with Rhyolitc magma?
A) Rhyolitic magma has low gas content; volcanoes with this type of magma erupt gently. B) Rhylotic magma has low viscosity; volcanoes with this type of magma erupt more often. C) Rhyolitic magma has high gas content; volcanoes with this type of magma erupt violently. D) Rhyolitic magma has low gas content; volcanoes with this type of magma erupt less often.
The estimated average geothermal gradient in the mantle is:
a. 10?C/km. b. 5?C/km. c. 1?C/km. d. -2?C/km. e. -5?C/km.
________ and ________ have led to a rise in median age in North America
Fill in the blank(s) with correct word