crossword 1

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Across
  1. 3. anything that has mass and takes up space
  2. 4. what something is made of
  3. 5. basic truths or foundations of knowledge
  4. 10. pure substance on the periodic table
  5. 12. examine or explore carefully
  6. 13. science of substances and reactions
  7. 14. positively charged particles in an atom's nucleus
  8. 15. neutral particles in an atom's nucleus
  9. 16. suitable for the situation
  10. 18. characteristics used to describe something
  11. 19. surroundings or conditions in which something exists
Down
  1. 1. test to discover something new
  2. 2. involving multiple academic disciplines combined
  3. 3. combination of substances not chemically bonded
  4. 6. relating to the method of systematic investigation
  5. 7. force exerted per unit area
  6. 8. groups of atoms bonded together
  7. 9. relating to the use of science in industry or inventions
  8. 11. smallest units of matter
  9. 17. repeated or predictable design or sequence