Reading and Vocabulary（A）
Step One:确定目标：
知识目标：学习下列单词：Reaction, equipment, react, partial
短语 ：React…with put…in order at the top
At the bottom find out
句型：
It is hard to think of a world without metals.
It is important to know how they react with different
substances.
能力目标：提高学生阅读能力。
情感目标：增强学生的合作意识，通过小组工作.
Step Two:基础自学： ㈠找出合适的单词填空：
A c hemical is a process in which two substances combine together
