【教学目标】
知识与技能：
1. 熟悉有关科学实验的词汇。
2. 熟记下列词汇和句型：
1). electrical, equipment, react, aim, conclusion, leave.
2). think of, in order; find out; make sure, add… to…; keep…out of…
3). It is important to know how they react with different substances.
It is/was +adj/n +(for/of sb) to do sth/that clause.
