1, scientific activities, focusing on letting children experience scientific principles. The working principle of submarine is that the volume is constant. By changing its own weight, submarine can dive or float.
The children in the big class have a certain operational ability and can master the operational requirements for injecting water into submarines. Try to let the children find that after being filled with water, the weight of the submarine increases and the submarine can dive underwater; When the water is discharged, the weight of the submarine is reduced and the submarine can float.
After completing three missions, it is found that the depth of submarine diving is deeper and deeper with the increase of water every time, which will make children feel the fun of exploration in the activities.