光化学

光 = 小 + 兀 : Mnemonic symbol: a laser pointer.

光 = 小 + 兀 : Gitta Giraffe is giving a big concert in front of the anglepod. She set up a lot of laser pointers for the light show, the audience is throwing daisies up to her and she is just rocking her 胡兀尔.

化 = 亻 + 匕 : Helga Horse and Rosa Luxemburg conduct an experiment in the ashram's bathroom. Using a transformer, they melt a ladle.

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.