Science Units 1- 3 Puzzle

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Across
  1. 3. bonded atoms as pure elements or compounds
  2. 5. elements listed by atomic# and properties
  3. 7. heterogeneous and homogeneous
  4. 11. organelle that breaks down molecules; ATP
  5. 12. surrounds cell; protects
  6. 13. made of many different cells; you
  7. 17. ability to pass through
  8. 18. cells where DNA is not contained in nucleus
  9. 19. made of cells, produce cells, build organisms
  10. 20. organelle that stores; large in plants
Down
  1. 1. the variable we change; mess with
  2. 2. organelle that breaks down materials in cell
  3. 4. harmful and helpful unicellular organism
  4. 6. 6CO2 + 6H2O yields C6H12O6 + 6O2
  5. 8. compound; metal transfers electrons to nonmetal
  6. 9. number that denotes # of atoms in a compound
  7. 10. organelle that photosynthesizes
  8. 11. elements with luster, malleable, and conductors
  9. 14. compound; nonmetal elements share electrons
  10. 15. smallest particle of matter; biotic & abiotic
  11. 16. tool that rates the strength of acids and bases