scd3

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Across
  1. 1. The smallest unit of an element
  2. 3. A substance that can't be broken down by chemical means
  3. 6. A measure of acidity or alkalinity in a solution
  4. 7. The study of the origin and evolution of the universe
  5. 8. The branch of science that deals with the study of living organisms
  6. 11. The process of a liquid becoming a gas
  7. 12. The study of heredity and variation in living organisms
  8. 13. A type of rock formed from cooled magma
  9. 14. The closest star to Earth
Down
  1. 2. The study of the Earth's atmosphere and weather
  2. 4. Fundamental particle with a negative charge
  3. 5. The force that pulls objects toward the center of the Earth
  4. 6. The process by which plants make their own food
  5. 9. The study of Earth's physical structure
  6. 10. A substance that speeds up chemical reactions