Which of the following is true of flood irrigation?
a. It relies solely on water that falls directly on the crop fields in the form of precipitation.
b. It results in 40% inefficient loss of the water applied.
c. It is the primary form of irrigation used in China.
d. It results in 40% inefficient loss of the water applied and it is the primary form of irrigation used in China.
e. At this time, it is the most efficient way to irrigate, from all of the known methods.
D
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Electromagnetic induction exists in a coil when there is a change in
A. the coil's polarity. B. voltage. C. electric field intensity. D. magnetic field intensity.
Treeless, bitterly cold most of the year, long and dark winters, low-growing plants, and permafrost are the characteristics of which of the following?
A. tall-grass prairie B. tundra C. short-grass prairie D. taiga E. savanna
Limestone is most intensely weathered in arid environments
Indicate whether the statement is true or false
LDPE is ________.
A. not currently recycled B. the most widely recycled plastic C. banned in Denmark D. the plastic used to make grocery bags E. a toxin found in most plastics