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For one, if you look at the example questions that define the Astronomy proposal, none of them are on topic for the Space Exploration site.
Astronomy is largely an academic site about the observation and
scientific study of celestial objects. Space Exploration SE is a much
more applied site about the engineering principles and challenges of
physical space exploration.
I would not suggest mixing the two.
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A valley ca be formed by flowing water from a river.
African colonies produced raw materials which were expropriated by the colonialists (centre nations). Furthermore, colonialism introduced a dual economic structure within the African economy. It also brought about disarticulation of African economy, education, trade, market, transport and currency institution.
The rail road is man made.
Here is your answer. Use physical geography in a sentence. Lol , jk . My physical geography class is very hard.
