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