Across
- 1. n a male Russian ruler before the Russian Revolution of 1917
- 4. n a layer of gases surrounding a planet, star, or moon
- 5. n a belief or custom passed down from year to year and generation to generation
- 9. n a place where wild plants and animals are protected
- 10. adj very important
- 16. n people who come to live in a new country
- 17. n a narrow trail or path made for people to walk on
- 18. n an imaginary line that circles the Earth halfway between the North and South Poles
- 19. v to get used to a new climate or situation
- 20. v saying something is not allowed; forbidding
- 21. n guesses about what might happen in the future
- 22. v changes from liquid to a gas
- 23. n scientists who study planets, stars, galaxies, and other objects in space
- 24. n a regular, predictable movement of living things from one location to another
- 26. n the violent or forceful impact of two particles or bodies
Down
- 2. v to fill something up again
- 3. adj difficult to achieve or understand
- 6. adj sudden or exciting; full of action or emotion
- 7. adj finely made; very beautiful or delicate
- 8. adj cheerful, hopeful, or free from worry
- 11. v to judge the worth of someone or something after careful examination
- 12. n strong excitement or interest
- 13. adj a small-scale model
- 14. n an area or a country that is ruled by or belongs to another country
- 15. n cleanliness for the purpose of staying healthy
- 25. adj made from a series of drawings that are put together to give the appearance of motion