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Objectives
Ⅰ.Leading-in
（情 境 导 入）
（友情提示：师友交流各抒己见 ）
Lesson 25
Let’s Do an Experiment!
In which subject do you often do experiments?
[k?'rekt]
[k?n'klu??(?)n]
[sa??n't?f?k]
['meθ?d]
[?k'sper?m?nt]
In Physics or Chemistry classes, we can get correct conclusions by
using scientific methods. Doing
experiment is a scientific method.
1. Where does Danny think they should do the experiment?
2. What keeps the water in the jar?
3. Is Jenny sure of her theory? How do you know?
4. What does Danny conclude?
1. Danny thinks that they should do the experiment outside.
2. The force of the air./The air pressure.
3. Yes, she is. She is so sure of her theory that Brian can do the experiment over
Danny’s head and he won’t get wet.
4. Air is stronger than he thought.
Read the lesson and answer the questions.
（友情提示：师友先独立完成，再互助交流。 ）
II. Introduction
（实 验 准 备 ）
Materials:
right side up