Asian science teacher runs an experiment for six schoolchildren by putting dry ice into four flask with colored liquid, there was reaction of smoke from dry ice in flasks with liquid
Asian science teacher with kids in lab class working about experiment by puts dry ice into flasks with colored liquid while there was reaction of smoke from dry ice in two flasks
Front view of Asian science teacher making an experiment for six school children by putting dry ice into four flask with colored liquid, there was reaction of smoke from dry ice in flasks with liquid
Young Scientist-Teacher Conducts Dry Ice Experiments for Children
Scientist put dry ice into a blue liquid in a flask
Respectable gray-haired male doctor doing chemical experiments with liquids in test tube and flask in medical lab
Front view of on lesson of chemistry group of schoolchildren with Asian teacher doing a chemical experiment using chemical liquids and dry ice in laboratory class
Two scientists makes experiments with dry ice in laboratory
Lab scientist pouring liquid in lab flask. Close up of female scientist doing laboratory experiment. Lab worker hands doing laboratory testing with chemical liquid in beaker
Asian science teacher with goggles looks at girl student doing experiment with liquids at chemistry lesson in classroom extreme closeup
Chemist pours liquid into flask. Stock footage. Chemist conducts experiment with flask and liquid substance. Laboratory experiment, close up
Chemist pours liquid into flask. Stock footage. Chemist conducts experiment with flask and liquid substance. Laboratory experiment, close up