Jennie's biology game

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Across
  1. 1. acids polymers that are made up of monomers called nucleotides
  2. 5. an atom that has gained or lost one of more electrons
  3. 8. any individual living thing
  4. 13. process that tests a hypothesis by collecting information under controlled circumstances
  5. 15. energy the amount of energy that will break a bond between two atoms
  6. 17. specific reactants that an enzyme acts on
  7. 18. the smallest basic unit of matter
  8. 19. the variety of life across the biosphere
  9. 20. a compound that releases a proton
Down
  1. 2. a condition that does not change during an experiment
  2. 3. catalysts for chemical reactions in living things.
  3. 4. the basic unit of life
  4. 6. tool that provides an enlarged image of an object
  5. 7. all organisms and the part of Earth where they exist
  6. 9. a segment of DNA that stores genetic information
  7. 10. an organized group of related parts that interact to form a whole
  8. 11. a proposed answer for a scientific question
  9. 12. all of the chemical processes that build up or break down materials
  10. 14. two or more atoms held together by covalent bonds
  11. 16. a substance made of atoms of different elements bonded together in a certain ratio