一. 教学内容：
Unit 4 Look into Scienc e Lesson 25-Lesson 28
1. 单词和短语
n. science experiment theory jar upside force swimsuit observation conclusion mud liquid solid spoon cornstarch spoonful plate
v. fill prove observe force examine discover explain add mix pour dissolve press taste empty
adj. surprised enough weird empty full
2. 语法
（1）一般将来时。
（2）表达肯定与不肯定。
