Posing the questions

Abstract

Questions are an essential part of science. But scientific questions are limited to the natural world—to material objects and energy changes you can observe directly or with scientific tools. The objects may be either living or nonliving things. The energy changes may be easy to observe, such as the sound of thunder overhead, or more difficult, such as the light coming from a distant star. What makes a question scientific is that it can be answered by observations, or evidence.