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Which fact first gave Alfred Wegener the idea that continents had drifted over Earth's surface?
Q5: The Zeeman effect describes what change in
Q7: One million times one thousand would equal
Q16: Which of the following sentences CORRECTLY describes
Q16: All the boundaries of the major moving
Q18: Which astronomer first detected the rotation of
Q33: The energy flux F from a star
Q48: Which one of the following processes was
Q54: What did Galileo see when he observed
Q119: If a star is over 1.5 solar
Q125: A ground-based telescope is pointed at the