Across
- 3. ancient Egyptians used the natural pigments and juices from this type of tree in their burial cloths
- 6. gold could not be used for weapons because it was too ________
- 8. the name of the Greek philosopher who gave the first explanations of chemistry in about 400BC
- 10. the control of _________ by chemists allow more control over substances
- 13. a natural piece of copper is _______________
- 15. the first people who developed theories about the structure of matter
- 18. the earliest use of gold was for this purpose
- 19. copper will change properties when subjected to _________
- 20. this age began when it was learned how to extract iron from rocks and then turn it into a useful material
- 21. the use of steel made it possible for the use of stronger _______
- 22. this is a Greek word meaning 'juice of a plant'
- 24. the production of glass and ________ was possible with the ability to control fire
- 26. alchemists were particularily interested in making _________
- 27. Aristotle believed that the two main features of earth was that it was dry and _________
Down
- 1. ___________ and gold were the earliest valuable metals
- 2. 'atomos' is a Greek word meaning ______________
- 4. the age in which only simple stone tools were used
- 5. Aristotle believed that all matter was made up of earth, air, fire and __________
- 7. fires were used, initially, mainly for cooking and __________
- 9. ancienct Egyptians extracted and purified juices and oil in the _________ of bodies
- 11. this comes from an Arabic word meaning 'the chemist'
- 12. this metal is an alloy of copper and tin
- 14. this word is derived from Greek word 'khemeia'
- 16. this group of people learned how to extract iron from rocks
- 17. iron combined with carbon produces this very hard material
- 23. the word used by a Greek philosopher to describe the smallest particles that could not be broken down further
- 25. today alchemy is not considered a true science because it involves the use of _______________