Eksperymenty chemiczne dla dzieci. Zabawne eksperymenty dla dzieci. Kobieta prowadzi lekcje kognitywnej nauki. Kropla barwnika z pipety wpada do kolby czystej wody. Przygotowanie cieczy do - Materiał filmowy & wideo

Two doctors in eyglasses are experimenting with test tubes with chemicals at a table in the laboratory on a black background. Experiments in the laboratory

Female scientist mixing chemicals in erlenmeyer flask

Close up of female scientist working in laboratory

A doctor in eyeglasses is mixing the liquid with chemicals in a glass jar on the table near other tanks. Doctors are conducting experiments with chemicals

Chemist prepares ingredients for chemical experiments. Chemical experiments for children. Fun experiments for children. A woman conducts cognitive science lessons.

Chemical experiments for children. Woman places the test tubes, and the girl waits. Fun experiments for children. A woman conducts cognitive science lessons. Fun games for children. Children stand at

Hemodialysis center. Connecting a person to the apparatus of an artificial kidney. Test tubes with venous blood.

Chemical experiments for children. Fun experiments for children. A woman conducts cognitive science lessons. Drop of dye from the pipette falls into a flask of clear water. Preparation of liquid for

Blood sampling at a medical facility. Blood samples stored in lab tubes for screening.

Chemical experiments for children. A light smoke rises from a transparent glass beaker . The room is filled with artificial smoke.