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