2. You've carefully thought out all the angles. You've done it a thousand times. It comes naturally to you. You know what you're doing, it's what you've been trained to do all your life. Nothing could possibly go wrong, right?

4. 1. Always wear safety glasses whenever you are working with chemicals or other substances that might get into your eyes. Hinkle Says…

5. Dinkle Says… 2. Never reach across a flame!

6. Winkle Says… 3. Immediately notify your teacher if any chemicals get on your skin or clothing to find out what to do to clean it off.

7. 4. Never look directly into a test tube when mixing or heating chemicals. Dinkle thinks you should…

8. 5. Always point a test tube away from you and others when heating it over a flame or other heat source. Hinkle Says…

9. Dinkle thinks that you should… 6. Never smell a chemical directly from the container. Wave your hand over the opening of the container and “waft” the fumes towards your nose.

10. Winkle Says… 7. Never taste a chemical unless you are instructed by your teacher to do so.

11. Hinkle Says… 8. Always clean up your work area and equipment after an experiment is completed Equipment must be returned to its proper place.

12. Dinkle thinks that you should… 9. Read and follow all directions exactly as they are written. If in doubt, ask your teacher for help!

13. Winkle Says… 10. Never mix chemicals (or perform tests) without your teacher’s permission.

14. Hinkle Says… 11. Never mix chemicals without your teacher’s permission.

15. Winkle Says… 12. Never run (or push someone else) in the lab.

16. Dinkle Thinks that you should… 13. Keep lids on bottles and containers when not in use.

17. Winkle says… 14. Never use broken or chipped glassware.

18. Superman Needs a Seat Belt During his days of fame, an airline flight attendant asked boxing champion Muhammad Ali to fasten his seat belt. Ali said, "Superman don't need no seat belt." The flight attendant replied to the champ, "Superman don't need no airplane either."

19. Dinkle thinks that you should… 15. Keep your work area clean and keep all materials (clothing, hair, papers, etc.) away from a flame or heat source.

20. Hinkle Says… 16. Always clean up your work area and equipment after an experiment is completed Equipment must be returned to its proper place.

21. Dinkle Thinks that you should… 17. Immediately notify your teacher if you get cut or have another injury when performing an experiment.

22. Dinkle thinks that you should… 18. Always wash your hands before and after an experiment…