Science
What is the rhythmic repetition surrounding the planetary day called?
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Which of the following characteristics is the force of gravity dependent on?
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What spacecraft takes astronauts into space, orbits the Earth and can be flown more than once?
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John Glenn was the first American to orbit the earth, in how long a flight?
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What two animals are found on the Australian Coat of Arms?
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Halley's Comet is predicted to appear again in which year?
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