Science Crossword

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Across
  1. 4. is positively charged particles in an atom
  2. 5. the largest layer of the earth
  3. 7. the place where organisms live
  4. 9. creates a force, accounts for electric transfers
  5. 10. is an object that attracts the metals
  6. 12. the transfer of thermal energy
  7. 13. organisms with nonliving surroundings
  8. 15. organisms working to maintain a steady-state
Down
  1. 1. they are negatively charged particles in an atom
  2. 2. speed of an object
  3. 3. where two plates are moving apart
  4. 6. the outer part of the earth
  5. 8. group of organisms of the same species
  6. 9. all the populations living in one area
  7. 11. a rock formation being broken by a fault
  8. 14. how much matter is in an object