Question

medal . Your teacher has given you an unknown substance in a test tube.
As the first step in identifying this substance, you are told that it is safe to test it for a smell.

Which of the following describes the safest way to tell whether the unknown substance has a smell?
Wave your hands to direct some of the smell toward your nose.

Pour some of the substance into a dish and smell directly from the dish.

Put your nose directly above the opening of the test tube and breathe in.

Pour some of the substance on a paper towel and sniff the paper towel.