8th grade Semester Exam Review

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Across
  1. 2. small, positively charged particle found in nucleus of atom
  2. 4. attraction between oppositely charged ions
  3. 6. a change in which new substances are formed is ____ change.
  4. 9. change in state from solid to gas
  5. 12. a reaction that absorbs energy
  6. 13. measure of how much matter is in an object
  7. 17. state of matter with definite volume but no definite shape
  8. 18. a reaction that releases energy
  9. 20. anything that has mass and takes up space
  10. 21. bond when atoms share electrons
  11. 23. electrons is the outer energy level are called ___ electrons
  12. 25. state of matter with no definite shape or volume
Down
  1. 1. state of matter with definite shape and volume
  2. 3. a small particle found in the nucleus of atom with no charge
  3. 5. a change that alters the form or appearance of matter is ___ change
  4. 7. measure of the force of gravity acting on an object
  5. 8. mass/volume
  6. 10. atom with an electric charge
  7. 11. the number of protons in an atom
  8. 14. study of the properties of matter and how matter changes
  9. 15. a pure substance that cannot be broken down into another substance by chemical or physical means
  10. 16. tiny, negatively charge particle in an atom
  11. 19. substance made of two or more elements chemically combined
  12. 22. ability to do work or cause change
  13. 24. basic particle from which all elements are made