白玫瑰、红牡丹、紫罗兰,还有金黄的油菜花儿,它们都配有碧绿的叶片,显得格外好看。这些花朵万紫千红,把春天打扮得更加美丽。花的不同颜色是怎样产生的呢?含有胡萝卜素的花瓣会反射出黄光或橙光来,使花色变成黄色或橙色。含有花青素的花朵,处在酸性情况下会现出红色;如果处在碱性环境中,它就现出蓝色;要是处在中性土壤中,花儿会出现紫色。如果你把一朵红色的牵牛花放进肥皂水里,花色就会变蓝,因为肥皂是碱性的;把这朵变蓝的花再浸到米醋里去,它会重新变为红色,因为醋是酸性的。山上盛开着红色杜鹃花(映山红)的土壤,大都是酸性的,因为映山红喜 White roses, red peonies, violets, and golden rape flowers, all with green leaves, look exceptionally attractive. These flowers are colorful and spring dress up more beautiful. How do the different colors of flowers produce? The petals that contain carotene reflect yellow or orange light, turning the color yellow or orange. Flowers containing anthocyanins show red if they are acidic, blue if they are alkaline, or purple if they are in neutral soil. If you put a red morning glory into the soapy water, the color will turn blue because the soap is alkaline; then the blueish flower is dipped into the vinegar again and it will turn red again, Because vinegar is acidic. The hill is full of red azaleas (azalea) soil, mostly acidic, because the azalea