General Knowledge Crossword

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Across
  1. 5. What is the name of the galaxy that Earth is part of?
  2. 6. What layer of the Earth lies beneath the crust?
  3. 7. What is the name of the first man to walk on the Moon?
  4. 10. What natural disaster is measured by the Richter scale?
Down
  1. 1. What do we call a scientist who studies the weather?
  2. 2. What instrument is used to measure air pressure?
  3. 3. What is the name of the imaginary line that divides the Earth into Northern and Southern Hemispheres?
  4. 4. Which instrument is used to measure rainfall?
  5. 8. What is the largest internal organ in the human body?
  6. 9. What is the outermost layer of the Earth called?