Sunshine News (Reporter Liu Jie, Correspondent Xiao Yi) In order to guide children to love science, explore and learn, actively practice, and implement the "double reduction" classroom to increase efficiency, recently, the third grade of Chanba No. 33 Primary School in Xi'an City has carried out various forms of scientific experiments with rich content.
Say material preparation
Talk about the experimental process and methodology
Triboelectric activation
In class, children rub their hair with a plastic ruler and look at their amazed eyes when they find that shredded pieces of paper can be sucked up.
Smoke backflow
Floating coins
Experimental Materials:
Disposable cups, paper clips, coins, water
Experimental process:
1. Fill disposable cups with water.
2. Place a paper clip or coin on the surface of the water by hand and see if it sinks into the water.
3. Fold the paper clip into an L-shaped gadget, hold the paper clip or coin, and place the paper clip or coin in the water again to see if it sinks into the water.
Materials: 1 raw egg, 2 cups, some salt, and a glass of water
Experimental principle: the density of clean water is small, the egg will sink, and the water with salt is dense, so the egg will float up. The higher the concentration of salt, the greater the buoyancy, which is the same as the principle of the Dead Sea, which is the Archimedes' principle, also known as the buoyancy principle.
Standing toothpick 16
Materials: toothpicks, water, cups, plates
Experimental principle: A single toothpick cannot stand because of its high center of gravity and small contact area with the boat. The surface tension of the soaked toothpick water causes a film of water to form between each toothpick, making it a whole, so you can stand up in the plate!
Talk about personal experience
While exploring hands-on, the children will also record the process and perception of the experiment in words!
Small experiments, big science, science allows everyone to plug in the wings of imagination. Through this experiment, everyone not only got the answers they wanted, but also deeply felt the charm of science. At the same time, it also makes everyone understand that science is not out of reach, as long as we are willing to explore and practice, everyone can become a little scientist!