Menino sorridente com rosto sujo segurando pinças perto de placa de Petri e frasco em laboratório - Banco de fotos e imagens

School boy doing chemistry experiment measuring chemical liquids in elementary science class. Clever pupil analyzing results of test in lab

School boy wearing protection glasses during chemistry experiment in elementary science class looking at camera with hand up and smiling. Clever pupil in lab during test

School boy measuring components during chemistry experiment in elementary science class. Clever pupil kid in lab

School boy wearing protection glasses with dirty face doing chemistry experiment with chemical liquids in elementary science class. Clever pupil analyzing results of test in lab

School boy wearing protection glasses with dirty face doing chemistry experiment in elementary science class and measuring components with spoon. Clever pupil in lab

School boy wearing protection glasses with dirty face doing chemistry experiment in elementary science class. and measuring colorful liquids Clever pupil in lab

Smiling girl in goggles and latex gloves pouring substance into flask during experiment in lab

Preteen girl in goggles and white coat smiling at camera near microscope in lab

Brunette girl in goggles looking at camera and holding flask in chemical laboratory

Girl in eyeglasses and white coat holding flask with blue liquid in lab

Happy brunette girl in goggles pouring red liquid from test tube into flask during chemical experiment in lab

Girl in goggles holding flask near microscope in laboratory

Surprised girl with dirty face holding tweezers near bowl and flask with steam in lab

Happy preteen girl in goggles looking at camera in blurred chemical laboratory, banner