Scientific Discoveries and Inventions 20

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Across
  1. 2. "The process by which organisms maintain water balance in their cells."
  2. 3. "The branch of astronomy dealing with the measurement of stars' positions."
  3. 4. "An organic compound consisting entirely of hydrogen and carbon."
  4. 7. "The study of the microscopic structure of tissues."
  5. 8. "The property of materials like iron to become magnetized."
  6. 10. "The storage of biological material at very low temperatures."
  7. 12. "The measurement of the human body to understand physical variation."
  8. 14. "The philosophical study of knowledge and its nature."
  9. 16. "The formation of new blood vessels in the body."
  10. 17. "A line on a weather map connecting points of equal atmospheric pressure."
  11. 19. "The study of the distribution of plants in relation to the Earth’s environment."
Down
  1. 1. "An instrument that measures light intensity at various wavelengths."
  2. 5. "A recording of the electrical activity of the heart."
  3. 6. "The science of movement in living organisms."
  4. 9. "The maintenance of stable internal conditions in an organism."
  5. 11. "The number and appearance of chromosomes in a cell nucleus."
  6. 13. "The study of the electrical properties of biological cells and tissues."
  7. 15. "The biological process that causes an organism to develop its shape."
  8. 18. "A fundamental particle and a building block of protons and neutrons."
  9. 20. "A technique used to introduce DNA into cells using high-velocity particles."