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Across 4. WHAT IS POTTASIUM USED IN? 5. WHAT METHOD CAN BE USED TO MAKE URINE DRINKABLE? 8. WHAT DOES EATING COOKED BACON INCREASE YOUR CHANCES OF? 10. WHAT IS USED TO COVER LEATHER? 12. WHAT CAN IODINE BE USED IN? 13. WHAT IS BROMINE USED FOR? 15. WHAT IS THE MAIN CONSTITUTE OF SUNFLOWER SEEDS? 17. WHAT IS SUPLHUR NEEDED FOR? 18. WHAT IS THE WORST FRUIT FOR YOUR TEETH? 20. WHAT IS THE MOST DANGEROUS E NUMBER? 21. WHAT LATIN WORD IS Pb DERIVED FROM? 22. WHAT TYPES OF PROBLEM CAN YOU GET FROM EATING LIQUORICE? 24. HOW MANY CUPS OF COFFEE WOULD YOU HAVE TO DRINK TO DIE OF CAFFEINE POISIONING? 26. WHAT IS THE ONLY LETTER THAT IS NOT USED IN THE PERIODIC TABLE? 28. WHAT YEAR WAS STEPHEN HAWKING BORN IN?

Down 1. WHAT IS THE SUBSTANCE THAT MAKES CHILLIS HOT? 2. WHAT CAN SODIUM NITRATE BY USED AS? 3. SPIDER POISON IS ONLY SLIGHTY POISONOUS TO WHAT TYPE OF ANIMAL? 6. WHAT DOES HARD WATER CONTAIN? 7. WHO IS CREDITED TO DECOVERING THE ELECTRON? 9. WHAT IS MADE FROM PEANUT OIL? 11. WHAT DOES EATING RAW MUSHROOMS INCREASE YOUR RISK OF? 13. WHAT IS THE LEAST REACTIVE METAL? 14. WHAT IS THE E NUMBER FOR SODIUM SULPHATE? 16. WHAT COLOUR DOES URANIUM TURN GLASS? 18. WHAT IS CALCIUM USED IN? 19. WHAT CAN EATING TOO MANY CARROTS DO TO YOU? 23. WHAT PECENTAGE OF MARS' ATMOSPHERE IS CO2? 25. WHAT PERCENTAGE OF OUR SKIN HAS SWEAT ON IT? 27. WHEN WAS SUPERGLUE DISCOVERED?