|
The expanding Earth or growing Earth hypothesis asserts that the position and relative movement of continents is at least partially due to the volume of Earth increasing. Conversely, geophysical global cooling was the hypothesis that various features could be explained by Earth contracting. While suggested historically, since the recognition of plate tectonics in the 1970s, scientific consensus has rejected any significant expansion or contraction of Earth. ==Different forms of the hypothesis== There are 3 forms of the expanding earth hypothesis. # Earth's mass has remained constant, and thus the gravitational pull at the surface has decreased over time. # Earth's mass has grown with the volume in such a way that the surface gravity has remained constant. # Earth's gravity at its surface has increased over time, in line with its hypothesized growing mass and volume. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Expanding Earth」の詳細全文を読む スポンサード リンク
|