Problem: Large masses, such as ice sheets or glaciers, can depress the crust of the Earth into the mantle. The depression usually totals a third of the ice sheet or glacier's thickness. After the ice sheet or glacier melts, the mantle begins to flow back to its original position, pushing the crust back up. This post-glacial rebound, which proceeds very slowly after the melting of the ice sheet or glacier, is currently occurring in measurable amounts in Scandinavia and the Great Lakes region of North America.
With what speed does post-glacial rebound occur?
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Answer: very slowly


Problem: All military occupations were open to women in 1989, with the exception of submarine service, which opened in 2000. Throughout the 1990s, the introduction of women into the combat arms increased the potential recruiting pool by about 100 percent. It also provided opportunities for all persons to serve their country to the best of their abilities. Women were fully integrated in all occupations and roles by the government of Jean Chretien, and by 8 March 2000, even allowed to serve on submarines.
What military occupation wasn't opened to women until the 2000s?
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Answer: submarine service


Problem: Galileo Galilei was brought before the Inquisition for heresy, but abjured his views and was sentenced to house arrest, under which he spent the rest of his life. Galileo was found "vehemently suspect of heresy", namely of having held the opinions that the Sun lies motionless at the centre of the universe, that the Earth is not at its centre and moves, and that one may hold and defend an opinion as probable after it has been declared contrary to Holy Scripture. He was required to "abjure, curse and detest" those opinions.
What belief did Galileo have at the time that appeared to be extremely heretical to the church?
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Answer:
the Sun lies motionless at the centre of the universe