Energy Sources and Forms in Matter

Energy in matter comes from the Sun and changes form in many everyday processes. The universe is made of matter in different forms, and all forms of matter contain energy. On Earth, many energy sources can be traced back to the Sun, which is the ultimate energy source.

Plants capture light energy...

能量被定义为做功的能力。它主要分为两种类型：势能和动能。

势能是与物体的位置、组成或状态相关的能量，也称为静止能量或储存能量。例如，桌上的书由于高于地面而具有势能。只要书保持在该位置，这种势能就会一直储存在书中。

动能是与物体运动相关的能量。例如，当书从桌面上落下时，其势能会因运动而转化为动能。