Which farming practice(s) reduce(s) soil erosion?
A. planting cover crops
B. contour farming and terracing
C. planting wind breaks
D. planting wind breaks, contour farming and terracing, and planting cover crops
Answer: D
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Which of the following statements explains the meaning of a probability forecast that calls for a "40 percent chance of rain"?
A. There will be measureable rain on 40 percent of the forecast area. B. There is a 40 percent chance that there will be measurable rain in the forecast area. C. There will be measurable rain during 40 percent of the time over the forecast area. D. There is a 40 percent chance that there will be no measurable rain at any random place within the forecast area.
Which of the following sites would most likely have less dangerous volcanoes? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a midocean ridge.
A) A and B
B) B and C
C) C and D
D) A and C
E) B and D
Which of the following is expected to be true in the carbonate ion, CO32-?
A) The carbon atom does not have an octet. B) The carbon to oxygen bond lengths are the consistent with single bonds. C) The carbon to oxygen bond lengths are the consistent with double bonds. D) The carbon to oxygen bonds are shorter than single bonds but longer than double bonds.
Ice core analysis shows a close correlation between atmospheric methane (CH4 ) and carbon dioxide (CO2 ) concentrations and temperatures
Indicate whether the statement is true or false