# 外研版必修一Module5 Listening, speaking, Writing

Module 5

A lesson in a lab

Do you have such an experience to do an experiment with the help of a teacher?

You will hear a conversation in which a teacher helps a student do an experiment. Can you predict the result according to the aim?

Listen to the conversation and complete the description of the scientific experiment.
Aim: to find out if there’s a change in weight when magnesium burns in air. Apparatus: Magnesium, Bunsen burner, a balance, a crucible.

Method: First, put the magnesium in the crucible.

Then put the crucible on the balance and weigh it.
Next, heat the magnesium. Light the Bunsen burner and hold the crucible over it.

Finally, weigh the magnesium again.

Result:

It weighs a little more than before.

Conclusion: There is a change in weight when magnesium burns in air.

1. 基数词的读法：
A.先说“几十”， 再说“几”。如： 23— twenty-three 89— eighty-nine B. 先说“几百”， 再加and,再加末两位数 （或末位数）。如： 223— two hundred and twenty-three 416— four hundred and sixteen 809— eight hundred and nine

C. 1,000以上的数先从后向前数，每三位数加一 “,”（千分位）；第一个“,”号前为thousand; 第 二个“,”号前为million; 第三个“,”号前为billion。 如： one thousand and one 1,001— four thousand 4,000— nine thousand, seven hundred and 9,743— forty-three a (one) hundred and seventy-four 174,301— thousand, three hundred and one seven hundred and fifty million 750,000,000—

2. 序数词的读法

one — first two — second three— third five— fifth eight — eighth nine— ninth twelve— twelfth

3. 分数的读法

1/5 1/7 4/7 7/10 97/111

one fifth
one seventh

four sevenths
seven tenths

ninety-seven one hundred
and elevenths

4. 小数的读法 小数点读作 point
0.5 0.76 1.23 point five point seven six one point two three twenty-three point four five

23.45

5.百分数的读法 27% — twenty-seven percent

45% — forty-five percent 86% — eighty-six percent

Can you say the following in English correctly?
1,000 one thousand

2,000
12,000

two thousand
twelve thousand

112,000

one hundred and twelve thousand 796,000 seven hundred and ninety six thousand

988,766,688
nine hundred and eighty-eight million, seven hundred and sixty-six thousand, six hundred and eighty-eight

987,654,321
nine hundred and eighty-seven million, six hundred and fifty-four thousand, three hundred and twenty-one

Now let’s say: 2/5 5/8 9/10 3/8 5/6 two-fifths five-eighths

nine-tenths three-eighths
five-sixths

1. What is ? of 6,000,000? Three million. 2. How much is 35,246,000 plus 12,800,000? Forty-eight million, forty-six thousand. 3. What is 25% of 200,000,000? Fifty million.

4. How much is 260,408,396 and 5,284,700? Two hundred, sixty-five million, six hundred, ninety-three thousand, ninety-six. 5. What is ? of 1,000,500,000? Seven hundred, fifty million, three hundred, seventy-five thousand. 6. What is 10% of 800,000,000? Eighty million.

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