Across
- 3. The gas we need to survive
- 6. A process of splitting long hydrocarbons in to shorter ones
- 7. The material used for sticking bricks together
- 8. Heat transfer by hot air rising
- 10. A molecule containing hydrogen and carbon only
- 12. fractional ____________ - a process used to seperate crude oil
- 14. All acids contain these ions
- 16. Objects in space used for communication
- 19. Sorting animals in to groups
- 21. A field that pulls us all towards the centre of the Earth
- 22. A saturated hydrocarbon
- 23. The type of radiation that mobile phones use
- 27. The second layer down in the Earth
- 28. Waves bouncing off a surface
- 30. The centre of the Earth
- 31. The fraction of crude oil that has the highest boiling point
- 32. A chain of many monomers
- 34. light amplification by the stimulated emission of radiation
Down
- 1. Waves bending when they cross a boundary into a new medium
- 2. Heat transfer by vibrating particles
- 4. The most penetrating nuclear radiation
- 5. A star 'explosion'
- 7. Lasers are coherent and _____________ (one colour)
- 9. The most common gas in air
- 11. Waves spreading out through a gap or around an obstacle
- 13. A Japanese nuclear power plant that had issues after an earthquake
- 14. All bases contain these ions
- 15. Something you can put in your loft to keep heat in
- 17. radio, microwave, infrared, visible, ___________, x-ray, gamma
- 18. He came up with the idea of natural selection
- 20. A picture in which colours represent temperatures
- 24. An hydrocarbon with a double carbon to carbon bond
- 25. The least penetrating nuclear radiation
- 26. Alkalis are _________ bases
- 29. Cement mixed with gravel
- 33. A cross between a lion and a tiger