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Across 5. A type of radiation that can pass through objects that are not transparent, used for photographing the inside of the body 6. A drug that is used to kill bacteria and cure infections 7. An oven that uses electromagnetic waves to cook or heat food very quickly 8. A very strong and quick-drying glue 9. An electronic device that uses magnetic and electric fields to produce powerful microwaves, used especially in radar and in microwave ovens 10. A small device placed inside the chest that helps the heart to beat regularly by sending electrical signals 11. A very sweet chemical substance used instead of sugar, especially by people who want to lose weight 12. A soft green, grey, or black substance that grows on old food or on damp walls / surfaces

Down 1. A chemical substance used to cover the inside of cooking pans, which stops food from sticking to them 2. A type of steel that does not rust (= change colour) and is used for making knives, tools, etc 3. A hard type of plastic used in the past for making things like telephones, radios, etc 4. An antibiotic substance produced by mould, used to treat diseases caused by bacteria