Explain net primary productivity
What will be an ideal response?
Answer: It is the amount of biomass added in an area (usually measured per square meter per year). It is the result of subtracting the materials necessary to keep plants alive from the total production due to photosynthesis. This amount varies substantially around the Earth, with tropical rainforests having the highest values.
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What event triggered a major slowdown in New Zealand's agricultural exports?
A) the loss of farm labor to New Zealand's growing industrial sector B) the British decision to join the European Union in 1973, which put in place strict agricultural protection policies C) the arrival of mad cow disease in New Zealand D) major climate change which limited the agricultural exports of New Zealand E) changing global markets which made Chinese agricultural exports cheaper
A dendritic drainage pattern is most likely to develop on rocks that ____
a. have multiple parallel folds b. form a volcanic mountain c. are criss-crossed by fractures and faults d. are of uniform resistance
An occluded front is depicted on a weather map as a line with semicircles on one side and triangular points on the other side
Indicate whether the statement is true or false
The Leaning Tower of Pisa leans because
A. the designers wanted it that way. B. the tower was built on unstable clay-rich soils. C. modern construction nearby has disturbed the foundation. D. the structure itself was poorly built.