Across
- 2. - Scientific study of life
- 7. - Well-tested explanation that unifies a broad range of observations
- 8. - Compound that produces hydroxide ions (OH-) in solution; a solution with a pH of more than 7.
- 9. - Evidence, information gathered from observation.
- 11. - Process of noticing and describing events
- 14. Bond - Chemical bond formed when one or more electrons are transferred from one atom to another.
- 17. - Relatively constant internal physical and chemical conditions that organisms maintain.
- 18. - Compound that forms hydrogen ions (H+) in solution; a solution with a pH of less than 7.
- 19. Reproduction - Type of reproduction in which cells from two parents unite to form the first cell of a new organism.
- 20. - Signal to which an organism responds.
- 21. Reproduction - Process of reproduction involving a single parent that results in offspring that are genetically identical to the parent.
- 22. - Force of attraction between different kinds of molecules.
- 23. Bond - Weak attraction between a hydrogen atom and another atom.
- 24. Group in an experiment that is exposed to the same
- 25. as the experimental group except for one independent variable.
Down
- 1. - Relatively constant internal physical and chemical conditions that organisms maintain.
- 3. - Possible explanation for a set of observations
- 4. - Variable that is observed and changes.
- 5. Experiment - Experiment in which only one variable is changed.
- 6. - The combination of chemical reactions through which an organism builds up or breaks down materials.
- 10. - A logical interpretation based on prior knowledge and experience.
- 12. Variable - Factor in an experiment that is deliberately changed.
- 13. - Change over time; the process by which modern organisms have descended from ancient organisms.
- 15. - Attraction between molecules of the same substance.
- 16. Bond - Type of bond between atoms in which the electrons are shared.