Midsection of cropped professor making black fire snake chemical experiment on desk in classroom at daytime
Tilting up of two diverse students sitting at school desk, experimenting with purple chemical liquids at daytime
High angle of two diverse students sitting at school desk, experimenting with purple chemical liquids at daytime, talking
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
Pharaoh's Snake. Chemical reaction with fire. Beautiful and terrifying reaction. Thiocyanate quicksilver
Pharaoh's Snake. Chemical reaction with fire. Beautiful and terrifying reaction. Thiocyanate quicksilver
Pharaoh's Snake. Chemical reaction with fire. Beautiful and terrifying reaction. Thiocyanate quicksilver
Pharaoh's Snake. Chemical reaction with fire. Beautiful and terrifying reaction. Thiocyanate quicksilver
Male teacher of chemistry setting fire to chemicals during lesson at school. Excited pupils and schoolteacher doing pharaoh snake experiment. Smart children studying science at laboratory
The black fire Pharaoh's Snake, fireworks growing snake ignition closeup
Selective focus of beaker on school desk in classroom at daytime