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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.

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