The significance of any great circle is that it always
A. connects two points on the surface of a sphere with the shortest distance.
B. passes through the North or South Pole.
C. passes through the point where the equator intersects with the Prime Meridian.
D. follows the same line of latitude.
Answer: A
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Which strategy has the city of Curitiba, Brazil used to greatly reduce the emissions of greenhouse gases compared to cities of comparable size?
A. Creating a car-free zone in the center of the city. B. Planting two trees for every one cut down. C. Instituting a site-and-service program for poor residents. D. Free daycare for low-income residents.
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
The movement of tectonic plates can best be described ______________.
-colliding -subsiding -sliding parallel to each other -sliding away from each other -all of these are correct
The species H3O+ can be called which of the following?
A) heavy water B) hydrogen ion C) hydronium ion D) all of these