. 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.
Stacey Warren - Expert brainly.com
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you need to stop submitting questions here and go to science or biology please @forever43
@Olyalhic ..hey, you know you can be a little nicer