Zusammenfassung der Ressource
Frage 1
Frage
Which was not one of the four elements the ancient Greeks believed comprised the world?
Frage 2
Frage
When did scientists first measure the motion of groups of moving galaxies?
Frage 3
Frage
The universe's expansion seems to be ________.
Antworten
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Slowing down
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Accelerating
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Changing directions
Frage 4
Frage
Today's best measurements estimate that about ___% of the universe is dark matter.
Frage 5
Frage
String theories can explain the universe but