Wide Shot Of Male Caucasian Professor In White Gown Gloves And Goggles Showing Chemical Experiment Lighting Match Talking To Audience In Classroom Female Assistant Sitting At DeskÂ
Medium long of male Caucasian professor in white gown, gloves and goggles showing chemical experiment, lighting match, talking to invisible audience in classroom, female assistant sitting at desk
Medium of male Caucasian professor in white gown, gloves and goggles holding beamer with purple liquid, talking to invisible audience in classroom, female assistant sitting at desk
Midsection of cropped male professor in white gown and gloves holding beamer with purple liquid, talking to invisible audience in classroom, smiling
Midsection of cropped professor making black fire snake chemical experiment on desk in classroom at daytime
Chemical experiment with fire. experiment to determine the composition - match flame close up
Chemical experiment with fire. experiment to determine the composition - match flame close up
Young scientist conducts chemical experiment in lab with assistant
Medium long of male teacher in medical gown and protective goggles standing in foreground of blackboard, showing experiment on chemistry lesson
Over-shoulder of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, making experiment with chemicals
Side view of male chemistry teacher in medical gown and protective goggles standing in front of high school students in morning, making experiment with chemicals
Laboratory assistant makes chemical experiments with colorful liquids with pupil
Young Muslim woman conducting chemical experiments in laboratory