Science facts

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Across
  1. 3. Which oath of ethics taken by doctors is named after an Ancient Greek physician?
  2. 7. What was the name of the first man-made satellite launched by the Soviet Union in 1957?
  3. 8. What is the hardest natural substance on Earth?
  4. 11. What do the letters in the word laser stand for
  5. 12. USB stand for
  6. 13. Which Apollo moon mission was the first to carry a lunar rover?
Down
  1. 1. You can't see me, but I can see you To be more specific, I see through. What am I?
  2. 2. Which famous British physicist wrote A Brief History of Time
  3. 4. seventy In which year did the Apollo 13 space mission take place?
  4. 5. What is the only letter not to appear on the periodic table?
  5. 6. What is the only active volcano on mainland Europe called?
  6. 9. Which Apollo moon mission was the first to carry a lunar rover?
  7. 10. What is the study of mushrooms called?