BIOLOGY I

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Across
  1. 1. Macromolecule used as insulation (blubber)
  2. 4. The study of interactions between an organism and its environment
  3. 6. Proteins that start the chemical reactions in our body
  4. 8. Safety eyewear worn during laboratory activities
  5. 10. A pure substance that consists entirely of one type of atom
  6. 11. Data based on observations
  7. 15. Number of electrons needed to fill an atom's second energy level
  8. 18. Polymer composed of carbon, hydrogen, oxygen, and nitrogen
  9. 19. A structured procedure for collecting information to test a hypothesis
  10. 21. Atom of the same element that has a different number of neutrons
  11. 22. Consumers that only eat plants
  12. 24. Substance enzymes act upon to start a reaction
  13. 28. A group of ecosystems that share similar climates and organisms
  14. 29. The tendency for water molecules to stick to other water molecules
  15. 30. Nutrient cycle that involves the burning of fossil fuels
  16. 32. A substance with a pH less than seven
Down
  1. 2. Large molecule formed by smaller molecules
  2. 3. A group of organisms that can produce fertile offspring
  3. 5. Another term for compounds that contain carbon
  4. 7. All of the chemical reactions that occur within an organism
  5. 9. Type of organism that only eats animals that are already dead
  6. 10. The movement of organisms out of a range
  7. 12. The smallest particle of an element
  8. 13. Type of population growth where resources are unlimited
  9. 14. Type of bond formed when atoms transfer electrons
  10. 16. Substance dissolved in a solvent
  11. 17. Variable in an experiment that is measured
  12. 20. The study of standards for what is right and what is wrong
  13. 23. Reproduction that involves one parent
  14. 25. The study of life
  15. 26. The elements or compounds that enter into a chemical reaction
  16. 27. Non-living factor in an ecosystem
  17. 31. Any substance that forms hydroxide (OH-) ions