She grabbed a handful of rice grains and scattered them on the ground to feed the pigeons.

scattered 是动词 scatter 的过去式形式。scatter 的意思是"撒播、散开"，指将小颗粒状物体分散地抛洒在某个区域。这个词常用来描述种子、谷物等细小物品的播撒动作。