Across
- 5. Flightless bird that lives in cold climates (P)
- 8. Gas humans need to breathe (O)
- 10. Ancient triangular structure built in Egypt (P)
- 12. Flowing water dropping over a cliff (W)
- 13. Australian animal that eats eucalyptus leaves (K)
- 15. Object that orbits a planet (S)
- 17. Tool used to track days and months (C)
- 19. Vehicle powered by pedaling (B)
- 21. Tool used to find direction (C)
- 22. Bright electrical flash during storms (L)
- 24. Tool used to measure temperature (T)
- 25. Australian animal that hops (K)
- 28. Plant that grows well in deserts (C)
- 29. Very hard valuable gemstone (D)
Down
- 1. Bag carried on your back (B)
- 2. Place where books are borrowed (L)
- 3. Powerful tropical storm (H)
- 4. Snow house built in Arctic regions (I)
- 6. Tool used to see faraway objects (B)
- 7. Large animal with a trunk (E)
- 9. Large mass of snow rushing downhill (A)
- 11. Intelligent ocean mammal (D)
- 14. Sea animal with eight arms (O)
- 16. Instrument used to see tiny objects (M)
- 18. Colourful arc seen after rain (R)
- 20. Fastest land animal (C)
- 23. Musical instrument with strings (G)
- 24. Tool used to observe space (T)
- 26. Mountain that erupts lava (V)
- 27. Largest planet in the solar system (J)