The answer is D. The Palaeozoic era was characterized by the supercontinent of Pannotia which was located at the current position where Chile is, 500 million years ago. There is evidence that shows that central Africa was once at the polar regions due to evidence of glaciers in its geological rocks. Due to tectonic movement, the Appalachians and the Ural Mountains were formed in the resulting Pangea supercontinent.
Answer:
A. They are extremely difficult to extinguish because fuel obviously is abundant and oxygen can enter easily, even through joints in surrounding rock.
Explanation:
Coal bed fires refers to spontaneous combustion which are triggered by human activity (mining), lightning, wildfires etc.
This usually happen underground when the coal beds are exposed to oxygen as a result of mining activities or human induced fires or combustion.
Answer:
450
Explanation:
i just learning here good question tho
True, A 'planar projection map' is helpful for sea navigation.
<u>Explanation:
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A 'planar projection map' that shows the particulars of the globe in a flat surface projection. The pictures projected by the map are shown in rectangular-shaped. If any other map such as Cylindrical map is used then, the edges are not so perfect, they show distortion. With the help of all three coordinates, it shows a 3-D picture of the globe and its objects which can be considered almost as real as the actual object. They are also known as azimuthal projections and are mostly used in projecting polar regions.
Precisely 3.2 astronomical units.
