"Excel IGCSE Gases in The Atmosphere Crossword": HTML5 Crossword

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3. Metal oxides are .............. (5)
4. The most abundant gas in air due to its unreactivity (8)
6. Most reactive gas in air (6)
8. Another name for burning (10)
10. The colour of copper (II) carbonate (5)
13. This vapour can be between 0 - 4 % of air (5)
15. Gives a blue flame when burnt (7)
16. Contains only carbon and hydrogen (11)
17. A metal that rusts (4)
18. This non-metal can be used to determine the percentage of oxygen in air (11)
19. This type of high energy radiation travels from the sun (11)
20. This hot metal can be used to determine the percentage of oxygen in air (6)

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1. Reacts vigorously with oxygen producing a bright white flame (9)
2. Non-metal oxides are .............. (6)
5. Molecules have to be this to absorb IR radiation (5)
7. This type of radiation is emitted from the earth's surface (8)
9. This acid is formed when sulphur dioxide dissolves in water (10)
11. This results from heating copper (II) carbonate (13)
12. Least reactive gas in air (5)
14. The colour of copper (II) oxide (5)