Wacky Word Puzzle

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Across
  1. 3. Mass divided by volume.
  2. 4. Carries genetic information in the nucleus.
  3. 7. Scientist known for laws of motion.
  4. 9. Tectonics Theory explaining movement of Earth's crust.
  5. 10. The smallest unit of matter.
  6. 12. Process by which plants make food using sunlight.Mitochondria Organelle known as the "powerhouse" of the cell.
  7. 13. An educated guess in an experiment.
  8. 14. Bending of light when it passes through materials.
Down
  1. 1. Variety of life in an ecosystem.
  2. 2. The body's way of keeping internal balance.
  3. 5. A change in velocity over time.
  4. 6. Heat transfer through direct contact.
  5. 8. A community of organisms and their environment.
  6. 11. Reaction Process where substances change into new ones.