The sky is blue because blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
What, is being called the midpoint exactly? My guess would be that Point C is the midpoint because it is the middle point of a line segment.
Wegener could not provide a wholly acceptable explanation for the movement of the continents.
Explanation:
Alfred Wegener is the person that developed and promoted the continental drift theory. Despite him having developed the basic idea behind the process, as well as managing to find several clues to support it, his ideas were not accepted by the other scientists and he found it extremely hard to gain support. The main reason as to why this was the case was that he didn't really had wholly acceptable explanation about the movement of the continents.
Everything that Wegener provided as evidence was correct, and it was proving a point. The problem was that he still lacked explanation for the driving force of this process, nor did he had any proof about it, and that was the basis for all other things. Every clue that he had was the final product, but no one could explain as to how that actually happened.
Some of Wegener's evidence were:
- identical fossils on different continents
- matching coastlines
- spreading zones
- matching rock strata on different continents
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The three means by which the early Polynesian sailors were able to navigate vast regions of the Pacific were by watching the motion of specific stars, weather and seasons of travel and direction, size and speed of ocean waves. The correct options among all the options that are given in the question are option "a", "b", "c".
