Across
- 3. An instrument for measuring the humidity of the air or a gas.
- 4. A fundamental particle and a fundamental constituent of matter.
- 5. A huge, powerful, and overwhelming force or institution.
- 8. An artistic work in a style that imitates that of another work, artist, or period.
- 11. Forming a network or having a network-like pattern.
- 13. A device such as a pattern of letters, ideas, or associations that assists in remembering something.
- 14. An optical instrument with two or more reflecting surfaces tilted to each other in an angle, so that one or more (parts of) objects on one end of the mirrors are seen as a regular symmetrical pattern when viewed from the other end.
- 15. A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
- 17. Describing a phase of the moon or a planet where it is more than half but not fully illuminated.
- 18. A mineral consisting of calcium fluoride which is used as a flux in smelting.
Down
- 1. A technique used in painting, where paint is laid on an area of the surface in very thick layers.
- 2. A mechanical model of the solar system used to demonstrate the relative positions and motions of the planets and moons.
- 6. A cold-blooded vertebrate animal that can live both in water and on land.
- 7. A model representing a scene with three-dimensional figures, often enclosed in a glass showcase for a museum.
- 9. Items of collectible memorabilia, typically written or printed ones, that were originally expected to have only short-term usefulness or popularity.
- 10. Referring to animals that are active primarily during twilight, i.e., dawn and dusk.
- 12. The Japanese art of growing miniature trees in small containers.
- 16. A simple slow-growing plant that typically forms a low crusty, leaflike, or branching growth on rocks, walls, and trees.