Across
- 4. and Tetracycline are Antibiotics .
- 7. of the pencil is made of a non toxic mineral called Graphite.
- 8. created the periodic table
- 9. periodic table has been updated to include 92 naturally occuring elements and 26 synthezised elements .
- 12. are substances that contain sulphates of compound .
- 14. acid is used in cheese as a presertative .
Down
- 1. help to increase the production of food.
- 2. was the first fibre created .
- 3. Laurent Lavoisier identified and named Oxygen in 1778 .
- 5. iron pillar is made of alloy and hight quality of iron .
- 6. Dalton proposed the atomic theory .
- 9. is neither loss nor created .
- 10. Nairne created eraser in 1770 .
- 11. is the main component of Talcum powder .
- 13. was formed in 1941 .