43.That's the point ??

It's said that only 50% of elementary and junior high school students could answered the questions of "law of conservation of mass" correctly. It's was low percentage of questions answered correctly.. "100g water + 20g salt = 120g" It's so difficult?? There are some humorous answers. "It's not 120g. Because the salt dissolve and it's nothing." Um... It's true we can't see it.. State authorities propose that they should have more opportunities to think of. But at first, It's important to have something they like, I think. Because if you can get interested in something, you can think of it naturally. Don't you think so?? only me??(laugh)

http://news.goo.ne.jp/article/sankei/nation/m20071128021.html