Across
- 1. - A device used to initiate and control a sustained nuclear chain reaction.
- 4. - A positively charged subatomic particle found in the nucleus of an atom.
- 8. - Relating to the Earth's atmosphere or atmospheric phenomena.
- 9. - The ability of a material to allow fluids or gases to pass through it.
- 10. - The branch of science that applies the principles of physics to biological systems.
- 14. - The study of the form and structure of organisms.
- 15. - The emission of light by a substance that has absorbed light or other electromagnetic radiation.
Down
- 2. - A chemical element fundamental to all life, forming the basis of organic molecules.
- 3. - The regions of Earth near the equator, characterized by warm temperatures year-round.
- 5. - An instrument used to see objects that are too small to be seen by the naked eye.
- 6. - The interaction of multiple elements to produce a combined effect greater than the sum of their individual effects.
- 7. - The measurement of electromagnetic radiation, including light.
- 11. - The time of year when the Sun reaches its highest or lowest point in the sky at noon, marking the beginning of summer or winter.
- 12. - A flow pattern in which the fluid spins around a central axis.
- 13. - A vast cloud of gas and dust in space, often the birthplace of stars