Qilu Evening News reporter Fan Jia Fu Yatong
pH test paper for seawater. Don't know how to distinguish them from sea water, rain water and spring water. .quot; Liu Wei, a 36 year old expert volunteer, is giving children a public science course. The interesting little experiment attracted children's attention at once.
Liu Wei took the children to do water experiments. This reporter Fan Jia photo
.quot; with pH test paper can make the water in the cup is showing the original shape. Dip it in a cup of reclaimed water to see what color it will turn into. .quot,
said, he gave each of the children here a test strip, and the children were eager to see the magic phenomenon. Sure enough, the rain became acidic, turned the test paper yellow, and the sea water was alkaline. The test paper turned green. .quot; the spring water in Ji'nan is neutral and the most suitable water for drinking. It contains many elements that we need and is good for our health. .quot;
Liu Wei is a senior engineer of the Shandong Academy of Sciences and the analysis and testing center of Shandong province. His specialty is marine environmental science, biological engineering and so on. Seeing the announcement of volunteers recruited by the provincial science and Technology Museum, he made his first name. .quot; we usually do some research on the units, and some of the frontier achievements are not clear to the public, especially the children. Popular science is a good way to combine what we do with real life. .quot; Liu Wei said with a smile.
this time he brought knowledge about hydrochemistry. Next, he plans to bring the algae and animals in the water to science.
.quot; first point in the water, wait until it is over, then gently pick out the desired pattern. .quot; in the next classroom, Zhang Fuling, a 35 year old expert volunteer, is patiently teaching children to paint in water. Zhang Fuling graduated from Shandong College of Arts and Crafts. He is a full-time painter of Ji'nan disabled persons' Federation Art Troupe. She introduced, in the water painting, the insoluble pigments insoluble in water form a random pattern with the flow of water, light the paper lightly on the surface of the water, and use the absorbability of paper to make the pattern.Quot; print.Quot; on paper.