Why does hematite cause the rusty red color observed in many surface rocks?
A) Hematite is a carbon-oxide, giving rocks the red color (even if in small amounts).
B) Hematite contains pyrite, giving rocks the red color (even if in small amounts).
C) Hematite is an iron-oxide, giving rocks the red color (even if in small amounts).
D) Carbonic acid weathers hematite, giving rocks the red color (even if in small amounts).
Answer: C
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Which of the following statements describes why wind speed generally increases with height above the Earth's surface?
A. Only the lowest layer of air rotates with the Earth. B. Wind instruments are not accurate at the Earth's surface. C. Friction with the Earth's surface slows the air near the ground. D. Air temperature normally decreases with height.
Describe the best energy source option(s) for a rural area in a tropical developing country with no coastal access. Be sure you support why this is the best energy source for the area.
What will be an ideal response?
Satellites' observations over decades have shown changes in the area in the Arctic covered by sea ice.
Answer the following statement true (T) or false (F)
Which remote sensing system would provide the best image of cloud heights, as well as ocean currents and volcanic hot spots?
a. near-infrared photography b. weather radar c. imaging radar d. thermal infrared scanning