Science

1234567891011121314151617181920
Across
  1. 4. Founded radium and polonium
  2. 5. The structure in a cell that contains the chromosones
  3. 8. Part of the atom that is positively charged
  4. 9. An apple fell on his head
  5. 10. Chemical symbol AG
  6. 11. The study of what makes us human
  7. 13. Group of seven elements, including helium etc.
  8. 15. The study of the Earth's physical structure
  9. 17. Part of the brain that controls memory
  10. 19. First element on the periodic table
  11. 20. Lab equipment, also a muppet
Down
  1. 1. Smallest bone in the human body
  2. 2. The only type of cloud that can produce hail, thunder and lightening
  3. 3. On the Moh Hardness scale, what has a hardness of 10
  4. 6. The green pigment in plants
  5. 7. Universal blood donor
  6. 12. The study of life and living organisms
  7. 14. Limestone deposit that rises from the floors of caves
  8. 16. Single super continent around 200 million years ago
  9. 18. A group of kangaroos is known as a