Across
- 2. when a natural thing breaks down to nothing
- 5. a person who goes into space
- 12. weather that is wet and hot
- 14. to put a number on how tall something is
- 15. a group of countries ruled by one leader
- 16. people who have culture and language
- 18. what we call Stella when she flies
- 21. to have something do what you want
- 22. like a very tiny seed
Down
- 1. a person who studies history
- 3. keep it for the future
- 4. something that you care a lot about
- 6. new inventions that make life easier
- 7. a policy that has been made law
- 8. standing still then moving very fast
- 9. try something and see what happens
- 10. the amount an object can hold
- 11. something that can slow down movement
- 13. shown on a map to tell you where to go
- 17. the people of one country make a new home
- 18. after accelerating we can measure this
- 19. what you use to pay for things
- 20. big sphere floating in space