7th Grade Science Final - Term 1

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Across
  1. 3. a column in the periodic table
  2. 5. subatomic particle with positive charge
  3. 8. studies fish
  4. 12. type of variable we control/manipulate
  5. 15. what all substances are made of
  6. 16. quantum/cloud model
  7. 19. the number of particles in an area; mass per unit volume
  8. 20. how much matter a substance contains
  9. 21. the amount of space a substance occupies
  10. 23. the smallest physical unit of an element
  11. 24. type of measuring system
  12. 25. harmful triatomic molecule
Down
  1. 1. state of matter with moderate molecular motion
  2. 2. state of matter with slow molecular motion
  3. 4. smallest part of an element with the properties of that element
  4. 5. a minute portion, piece, fragment or amount
  5. 6. diatomic molecule
  6. 7. studies life and living things
  7. 9. a measure of warmth or coldness
  8. 10. 78% of the atmosphere/air
  9. 11. type of variable we measure
  10. 13. developed idea of the atom
  11. 14. member of nitrogen family with 16 neutrons
  12. 16. element with no neutrons
  13. 17. subatomic particle with negative charge
  14. 18. state of matter with fast molecular motion
  15. 22. subatomic particle with no charge
  16. 24. a miniature representation