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) Wear safety goggles while looking into the opening of the test tube.
B) Cover the opening of the test tube so that no materials can boil out of it.
C) Move the test tube so that the opening is pointing away from all students.
D) Put the test tube in a hot water bath so that no water can enter its opening.