In this picture you see Frank leaving the bunsen burner to go look in the microscope. The problem with this is that he is leaving the bunsen burner on while he is not using it. You should never have the bunsen burner on if you are not using it. Because it can cause a fire, or cause harm to someone.
In this story you see Bob sitting while experimenting. Dan is yelling at Bob to stand up so he doesn't hurt himself. You should always stand while experimenting. Sitting during an experiment can hurt you because if
In this image you see George getting a little too curious and smelling the chemical. You should never smell, touch, or taste a chemical. Chemicals can be toxic and can cause harm.
In this picture, you see John not cleaning up after he spilled some liquid which resulted in Luke getting hurt. You should always tell the teacher after you spill something, then clean it up. If you don't you could harm someone like what happened to Luke.