Crosswords improve your Vocabulary, Knowledge of Word Definitions and Word Grouping Recognition.
Crosswords also relieve stress and generally improve your mood.
Ideally Suited to 11 years and older.
Instructions:
Complete the Crossword by inserting an appropriate word according to the provided descriptions.
Simply click on a box and type a letter to complete the puzzle.
Completing the Puzzle Unlocks A Bonus Message.
1. Makes up ~75 of our Sun.
2. Often used in floating balloons.
3. Commonly used in lit....ion batteries.
4. Commonly used in gears and cogs for machines.
5. Commonly used as Borax – a laundry booster.
6. Commonly found as graphite pencil lead, graphene 200x stronger than steel, and diamond hardest natural substance.
7. Commonly used as Ammonia – an ideal agricultural fertilizer.
8. Commonly found in water, and made during photosynthesis.
9. Added to toothpaste for tooth decay resistance. Was also found in chlorofluorocarbons CFCs which contributed to ozone O3 depletion.
10. Commonly used in highvoltage redorange neon lights.
11. Commonly found in table salt sodium chloride, the most common food seasoning.
12. Common in fireworks as it ignites easily when exposed to air, burning with a bright light.
13. Commonly used in the automotive engines and aviation aircraft structure because it is light, strong and corrosion resistant.
14. Commonly used in the electronics industry for its semiconductor properties computer chips CPU.
15. Naturally glows green in the dark. Commonly used as red phosphorus in safety matches.
16. Naturally released in volcanic regions. Commonly used as sulfuric acid H2SO4, a low pH highly corrosive liquid.
17. Commonly used as a disinfectant kills bacteria in drinking water and swimming pools.
18. Commonly used as an inert shielding gas in metal welding protects metal from oxygen in the air.
19. Important dietary component e.g. bananas needed for normal cell function maintains cell fluid and electrical gradients.
20. Important dietary component e.g. milk needed for normal cell function nerve signal transmission.
X
Congratulations, you have completed the
Puzzle!
Clearly you are a Master of the Elements!
