问答题 设计任务：请阅读下面学生信息和语言素材，设计一个25分钟的听力教学活动。
教案没有固定格式．但须包含下列要点：
teaching objectives
teaching contents
key and difficult points
major steps and time allocation
activities and justifications
教学时间：25分钟
学生概况：某城镇普通中学高中一年级学生，班级人数40人。多数学生已经达到《普通高中英语课程标准(实验)》五级水平。学生课堂参与积极性一般。
语言素材：
Why do earthquakes happen? Scientists explain that the outside of the earth is made of a number of different plates. At San Francisco, the Pacific plate which is moving towards the northwest meets the North American plate. The Pacific plate is moving very slowly--at 5.3 centimeters a year. Sometimes these two plates stop and do not move for years. Then suddenly, they jump and an earthquake is felt. As a result of the movement of these plates, California has always had a lot of earthquakes. When the 1906 earthquake happened, the Pacific plate jumped 5-6 meters to the north.
China also has an unlucky place on the earth. The Pacific plate is also pushing on China from the east as the plate moves west. Likewise, the Indian plate is pushing on China from the southwest as that plate moves northeast. The same power that produced the great Himalayan Mountains now causes earthquakes in China.
We cannot stop earthquakes, but we can do things to make sure they do not destroy whole cities. First, it is not a good idea to build houses along the lines where two of the earth's plates join together. Second, if you think there may be an earthquake, it is better to build houses on rock than on sand. Third, you must make the houses as strong as possible. Weak buildings will fall down in an earthquake, but strong ones may stay up.

Class Type: Listening class
Teaching Contents: The topic is about the earthquakes.
Teaching Objectives:
(1) Knowledge objectives
Students can learn some useful words and expressions about earthquakes.
Students can know about the basic knowledge of earthquakes the listening material refers to.
(2) Ability objectives
Students can develop their ability to get specific information and take notes while listening.
Students can improve their speaking ability through discussion and communication.
(3) Emotional objectives
Students can learn more about basic knowledge of earthquakes so as to know how to reduce losses of earthquakes and how to protect oneself and help others in earthquakes.
Students can be more confident in speaking English in class and can cooperate with others actively, and complete the tasks together.
Teaching Key Points:
How to develop the students' listening ability.
How to let the students know the cause of earthquakes and ways of reducing losses earthquakes bring about.
Teaching Difficult Points:
How to get the students to listen and understand different listening materials.
Major Steps:
Step 1 Pre-listening (7 minutes)
Show some pictures about damages from earthquakes and the map of the world to the students. Tell them the places where the earthquakes usually happen.
Let the students guess what the listening material may be about. Play the tape for the first time for students to listen and decide whether their guessing is right.
(This listening material is about the cause of earthquakes and how we can reduce losses from them.)
(Justification: To help students better understand the backgrounds of earthquakes.)
Step 2 While-listening (10 minutes)
Activity 1:
Let the students read the following statements. Play the tape for the second time. Then ask students whether they are true or false.
(1) It is believed that on the surface of the earth are a number of plates.
(2) The plates are always moving.
(3) If the plates stop moving, there is an earthquake.
(4) If the plates move, there is an earthquake.
(5) Wherever you live, you are in an earthquake area.
(6) China has two plates pushing on her and they make mountains and earthquakes.
Check the answers and try to correct the statements which are false.
Suggested Answers: (l) T (2) T (3) F (4) F (5) F (6) T
Activity 2:
Play the tape again and then ask students to answer the questions and complete the following sentences.
Part 1:
(1) Why do earthquakes happen
(2) Why do California, China and Japan have a lot of earthquakes
Part 2:
(1) Do not build
(2) Make sure you build
(3)Youmust__________.__________buildingswillfalldownand__________ones may__________.
A few minutes later, check the answers with the whole class.
(Justification: To help students learn more information about earthquakes. Mter doing this, students' listening ability can be improved.)
Step 3 Post-listening (8 minutes)
(1) Discussion in small groups
Why do some earthquakes kill more people than others
Then ask two students to share their groups' ideas and give them some assessments.
(2) Reading and retelling
Show the students the listening text. Let them read after the tape and pay more attention to the pronunciation,and do the imitation. Then ask them to retell the cause of earthquakes and the ways of reducing losses from earthquakes.Then make a summary on how to reduce losses of earthquakes and bow to protect themselves and others in earthquakes.
(Justification: To get students to talk about earthquakes, improve their ability of speaking and cultivate their cooperative awareness through the discussion and make them know how to protect themselves and others in earthquakes.)