Across
- 1. The hidden world under the ground.
- 3. Opposite of light; when there is no sun or brightness.
- 4. A big, beautiful building, often for kings or queens.
- 8. A long trip from one place to another.
- 9. A great cultural and social development of a group of people.
- 10. The sun going down, when day turns into night.
- 11. Land covered with many trees.
- 13. A person who travels through time.
- 15. People who live underground in the future; strong and frightening.
- 16. The people who live on the surface in the future; small, gentle, childlike.
- 17. The fourth measure beyond length, width, and height (time).
- 19. Brightness that makes things visible.
- 22. Bright burning flame used for light and heat.
- 23. The time that has already happened.
- 24. Shining points in the night sky, far away in space.
- 26. The time that has not happened yet.
- 27. A sense of trust and positive expectation for the future.
- 28. Something created by humans, usually new and useful.
Down
- 2. The line between two places or the space between them.
- 5. The place where scientists do their experiments.
- 6. A new idea or fact that someone finds out.
- 7. A situation where harm is possible.
- 10. To be without risk, in protection.
- 12. A person who studies and experiments with science.
- 14. A large moving watercourse in nature.
- 18. A scientific test or trial to prove an idea.
- 20. Machine A machine created to move through time.
- 21. The current moment, what is happening now.
- 22. The feeling when you are afraid.
- 25. The bright object that shines at night, smaller than the sun.