How much of the world's food is produced on irrigated land?
A. almost half
B. less than 10%
C. almost all
D. none
Answer: A
You might also like to view...
It is theorized that a pulsar only emits X-rays and visible light during its early history. What do you suppose is the basis of this theory?
A. As the pulsar's energy dissipates, the frequency of the energy it emits drops. B. X-rays are likely the result of radioactive decay, which only can occur in a pulsar's early history. C. The pulsar's high rate of spin produces a magnetic field that, over time, slows the pulsar down. D. X-rays and visible light are both part of the electromagnetic spectrum.
What is a source of energy for chemosynthesis?
a. sunlight b. oxygen c. electromagnetic radiation d. carbon dioxide e. methane
A sea breeze is most likely to develop along a coastline when
a. pressure gradients between the land and sea are large. b. pressure gradients between the land and sea are small. c. ?it is raining. d. ?it is foggy. e. ?surface temperatures are high.??
The reason land surfaces do not flood and oceans do not dry up—as a result of imbalances in the hydrologic cycle—is a process called ________
A) precipitation B) evaporation C) evapotranspiration D) infiltration E) runoff