Across
- 1. A thin piece of glass or plastic placed over a specimen
- 3. Pointing straight up and down
- 8. Parallel to the ground, running left to right
- 9. A substance that speeds up the nervous system
- 11. A number that represents the middle of a group of numbers
- 13. A set amount by which a measurement or value increases
- 14. Adjusting the microscope so that the specimen appears clear
- 17. A hormone your body releases during stress or excitement
- 18. A thin piece of glass used to hold a specimen for viewing
Down
- 2. The object or sample being observed
- 4. The variable that is changed or controlled in an experiment
- 5. How much larger an object appears through a microscope
- 6. A tiny freshwater crustacean often used in science experiments
- 7. The combined magnification of the ocular and objective lenses
- 10. The variable that is measured or observed in an experiment
- 12. A substance that slows down the nervous system
- 15. A pair of numbers used to on a graph
- 16. rate The number of times the heart beats in one minute
- 19. A substance that has an effect on the nervous system