The Nature of Life

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Across
  1. 3. Electrons are shared equally
  2. 4. outside of the cell membrane in plants, fungi, algae, and bacteria
  3. 5. Two or more elements united in a definite ratio by chemical bonds
  4. 7. The capacity to perform work or to produce a change
  5. 10. Energy is constant. It cannot be gained or lost, only converted from one form to another.
  6. 11. Formed when molecules lose or gain electrons
  7. 12. Electrons in outermost orbital can be removed from one atom and transferred to another atom
  8. 13. Fatty or oily substances that are mostly insoluble in water (fats and oils)
  9. 14. Electrons are shared unequally (like water)
  10. 17. When energy is converted to another form, it flows from a high energy state to a low energy state and releases energy during the conversion.
  11. 18. Combining capacity of an atom or an ion based on electron number
  12. 19. Two or more atoms bound together
  13. 20. Smallest stable subdivision of an element
  14. 21. Center of an atom
  15. 22. Structural units of organisms
Down
  1. 1. Interior cell matrix
  2. 2. Study of energy and its conversions from one form to another
  3. 6. Positively charged particles
  4. 8. Neutral particles
  5. 9. numbers Number of protons
  6. 12. Form of an element that varies in its number of neutrons and atomic weight
  7. 15. Combined number of protons and neutrons
  8. 16. Negative electric charges circling the nucleus