《A Lesson in a Lab》教案2

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　　Period 1
　　Introduction & Vocabulary and Speaking
　　Teaching aims:
　　1. To introduce some general science .
　　2. To learn some words related to the theme of this module .
　　3. To develop speaking ability by practicing saying the numbers, especially the fractions.
　　Important and difficult points:
　　1. Arouse the students’ interests and love in science.
　　2. Enable the students to understand some elements about the chemistry lab.
　　3. Make the students know how to read the numbers.
　　Teaching procedures:
　　Introduction
　　Activity 1
　　The aim of the activity is to ask the students to finish the quiz about general science to arouse their interest in science. The activity can be done as follows:
　　Firstly, ask the students to go through the following the quiz and make their choice on their own.
　　Quiz: How much do you know about general science?
　　1. Water exists __________
　　(a) as a solid, a liquid and a gas     (b) as a solid and a liquid only
　　2. When you heat a metal, it will ___________
　　(a) expand     (b) contract
　　3. Steel is mixture of_____________.
　　(a) iron and other substances.     (b) iron and oxygen
　　4. _______________ of the earth’s surface is water.
　　(a) Two-thirds     (b) 50%
　　5. The distance of the sun from the earth is ______________ kilometers.
　　(a) 25,500     (b) 150,500,500
　　6.The earth is 4.6______________ years old.
　　(a) million     (b) billion
　　7. The earth is ______________ the moon
　　(a) twice as large as     (b) forty-nine times larger than
　　Then put the students in pairs to compare their answers and call back the answers from the class.
　　Finally ask them to listen to the tape about the above quiz and check their answers.
　　Answers: 1. a;     2. a;     3. a     4. a;      5. b;     6. b;     7. b.
　　Activities 2 & 3
　　The teacher can prepare some cards about different things for the class at first. Before showing the students the cards, the teacher can say to the whole class: Things can be divided into three kinds, natural, man-made, and either natural or man-made, now I’ll show you some cards in my hand, can you tell me which are natural, man-made or both?
　　After this, the teacher can continue to say to the whole the class: Can you give some examples?  Then divide the whole class into two big groups to compete. The teacher can ask the Ss to speat as many examples as possible and write down the words in the table on the blackboard as follows:
　　Natural  Eg: wood, ------
　　Man-made Eg: glass, ------
　　Either natural or man-made Eg: water, ------
　　Finally, ask the Ss to open their books at Page 41 and read the words in the box aloud. If possible, they can look up the words to know what they mean. Of course, the above competition will continue, that is to say, at this moment, the teacher can ask the Ss to put the words in the box on Page 41 in their books in the above table.