What factor(s) can explain the uncertainty in estimating the availability of mineral resources?
a. Discovery of new mines and extraction techniques.
b. Changing trends in consumer demand.
c. Advances in recycling technologies.
d. All of these can explain the uncertainty.
Answer: D
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One reason for worsening terms of trade is that less developed countries are often dependent on one primary commodity for export
Indicate whether the statement is true or false
Most deformation occurs along plate boundaries because ________
A) that is where the molten material makes it easy to deform rock B) the plates were broken along their boundaries so that is where they are weakest C) the plates are in constant motion and as a result the boundaries are where they interact D) plates are rigid in their interior but the boundaries are in the asthenosphere.
The Type D (continental) climates dominate the southern portion of __________, and the territory consists mainly of coniferous forests in a biome called the __________.
a. Russia; permafrost b. Russia; taiga c. Siberia; taiga d. the Eastern Frontier; permafrost e. Siberia; tundra
The rings of Saturn are largely composed of
A. purple and green metallic substances. B. drops and blobs of liquid water. C. icy chunks the size of sand, pebbles, and boulders. D. All of these choices are correct.