阅读D篇 ( 1 )You have learned about energy. Do you know that HEAT is a form of ENERGY? Yep, this form of energy acts on everything. And, were going to look at a few experiments to learn how this form of energy acts and why we need to know all about it.The heat energy of something is decided by how active its atoms(原子)and molecules(分子)are. A hot object is one whose atoms and molecules are excited and show rapid movement. A coo
