Across
- 2. the information gathered from observations
- 5. set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
- 6. basic unit of all forms of life
- 9. microscope that allows light to pass through a specimen and uses two lenses to form an image (3 words)
- 14. well-tested explanation that unifies of broad range of observations
- 16. the process of which organisms maintain a relatively stable internal environment
- 17. process by which a single parent reproduces by itself (2 words)
- 19. the variable that is deliberately changed in an experiment (2 words)
- 20. an organized way of using evidence to learn about the natural world
- 21. a logical interpretation based on prior knowledge or experience
- 22. a technique to separate the different cell parts (2 words)
- 23. the variable that is observed and that changes in response to the manipulated variable (2 words)
Down
- 1. a signal to which an organism responds
- 3. an experiment in which only one variable is changed at a time (2 words)
- 4. microscope that forms an image by focusing beams of electrons onto a specimen (2 words)
- 7. device that produces magnified images of structures that are too small to see with the unaided eye
- 8. the science that employs the scientific method to study living things
- 10. the idea that life can arise from nonliving matter (2 words)
- 11. group of cells grown in a nutrient solution from a single original cell (2 words)
- 12. a proposed scientific explanation for a set of observations
- 13. decimal system of measurement based of certain physical standards and scaled on multiples of 10 (2 words)
- 15. process by which cells from two different parents unite to produce the new cell of a new organism (2 words)
- 18. the process of gathering information about events or processes in a careful, orderly way