science in the 20th Century

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Across
  1. 5. A person who studies and explores how the world works
  2. 7. A tool to see tiny things like cells
  3. 10. Energy sent out in waves or particles
  4. 11. A disease nearly wiped out by vaccines
  5. 12. A new idea or invention
  6. 13. The basic building block of matter
  7. 14. Invisible rays used to see bones and inside the body
  8. 17. A machine used to process information
  9. 19. A substance that helps prevent disease
  10. 20. A scientific idea supported by evidence
  11. 21. A machine sent into orbit around Earth
  12. 23. A vehicle used to travel into space
  13. 25. A new tool or device someone creates
Down
  1. 1. Medicine that kills bacteria
  2. 2. A tiny particle with a negative charge
  3. 3. The first antibiotic discovered by Fleming
  4. 4. Einstein’s theory about space and time
  5. 6. The science of motion, matter, and energy
  6. 8. Energy released by unstable atoms
  7. 9. Energy that powers machines and lights
  8. 15. A tool to see distant stars and planets
  9. 16. A famous prize awarded for important discoveries
  10. 18. The first place humans visited outside Earth
  11. 22. A pure substance made of one kind of atom
  12. 24. The study of how traits are passed from parents to offspring