Match the causes of soil erosion with the soil conservation practice intended to reduce that erosion.Character of the soil:
A. Keep soil covered
B. Contour plowing
C. Provide shelter for fields
D. Return organic matter to soil
Answer: D
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How is ozone produced in the upper atmosphere?
A. It diffuses from the lower atmosphere. B. It forms by reaction of oxygen molecules with UV light. C. It forms by nuclear decomposition of oxygen. D. It forms by the reaction of nitric dioxide and oxygen. E. all of the above
A boxer punches a sheet of paper in midair and brings it from rest up to a speed of 40 m/s in 0.05 s. If the mass of the paper is 0.01 kg, the force of impact on the paper is about
A) 0.08 N. B) 0.8 N. C) 8.0 N. D) 80 N.
Upwelling can increase biological productivity, but it is unable to influence weather conditions. Indicate whether the statement is true or false
Methane, CO2, and water vapor make up about 30% of the earth's troposphere.
Answer the following statement true (T) or false (F)