Lloyd’s lab partner is looking down into a test tube while he heats the contents by using a flame. Which action should Lloyd recommend to his partner if heating must continue?

A test tube being heated can suddenly spit or eject hot liquid, so its opening should never point toward anyone. Lloyd should recommend moving it so the opening points away from all students. Covering the opening can cause pressure to build, and safety goggles do not make it safe to look down the tube.

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