1. Investigation carried out to discover or gain knowledge

1. Projectile that obtains thrust by the reaction of escaping gases

2. Remains or impression of a prehistoric organism preserved in petrified form

3. Long-term pattern of weather in a particular area

4. Related to the sun

5. Cell transmitting nerve impulses in the nervous system

6. Combining lightweight atomic nuclei to form a heavier nucleus and release energy

7. Basic structural, functional, and biological unit of all living organisms

8. Explanation based on observation, experimentation, and reasoning

9. Ability to do work or cause change

10. Infectious agent that can replicate only inside the living cells of an organism

11. Vibrations that travel through the air or another medium

12. Change in position or location over time

13. Place equipped for scientific research and experiments

14. Element essential for combustion and respiration

15. Smallest unit of a chemical element

16. Facts, statistics, and information gathered for reference or analysis

17. Underground storage area for scientific samples or materials

18. Molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms

19. Physical substance that occupies space and has mass

20. Large area covered by trees and undergrowth

21. Device that emits light through a process of optical amplification