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Educational experiment. School classes. Biology and chemistry lessons. Observe chemical reactions. Chemical reaction much more exciting than theory. Girls working chemical experiment. Natural science
Keywords:
education
studying
laboratory
childhood
child
indoors
caucasian ethnicity
blackboard
desk
intelligence
scientific experiment
school children
science
student
formula
microscope
classroom
research
school building
physics
scientist
elementary age
schoolgirl
elementary school
chemistry
learning
girls
chemistry class
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