Across
- 4. Tool that provides an enlarged image of an object
- 9. Using one of the five senses to gather information
- 10. The subject that is used for a standard of comparison
- 12. Based on observable characteristics using the five senses
- 13. basic unit of life
- 15. When a hypothesis has been tested repeatedly over and over and it is supported by evidence
- 16. Use and application of living things and biological processes
- 17. The factor that can be changed or manipulated in an experiment
- 19. An average
- 20. A testable explanation for observations and questions about the natural world
- 21. Scientific facts combined with well tested hypotheses
- 23. Regulations and maintenance of constant internal conditions in an organism
- 24. transmits electrons through thin slices of specimen
Down
- 1. Inherited traits that are selected over time because it allows organisms to better survive in their environment
- 2. Using knowledge to identify and explain observations in advance
- 3. scans surfaces with a beam of electrons
- 5. Any variable that remains the same for both the experimental and control groups
- 6. Change in a species overtime; process of biological change by which descendants come to differ from their ancestors
- 7. Variety of life within an area
- 8. The most variable conditions or levels for growth, reproduction, or success
- 11. The factor that responds to changes in other variables in an experiment
- 12. Based on measurable characteristics
- 14. Used to see living or preserved specimens and provide clear images
- 16. Scientific study of all forms of life
- 18. Development of ideas based on observations
- 22. All chemical processes that break down materials within an organism