Module5 A Lesson in a Lab课件

We can reach a conclusion that it is important for us to read books.
It is our aim to build up a harmonious society.
It is a piece of electrical equipment.
Reading and vocabulary
Passage A
Read the passage as quickly as you can and choose the best title for it.
The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen
e up with 突然想起→come to life 苏醒； 活跃起来
8.from that moment on 从那一刻起→fromthen on从那时起→from now on从现在起
9.in turn轮流→ by turns轮流地；依次地 →take turns to do...轮流做……→turn out 结果是……
1. In the first part of the experiment, the _a_ir_ is dry, not wet. 2. It shows that iron _d_o_e_s_n_o_t _r_u_st when the air is dry.
3. In the second part of the experiment, you must _b_o_i_l the water to make sure there is no _a_i_r_ in it. 4. You add __s_o_m__e_o_i_l to the water because this keeps _a_i_r_ out of it. 5. It shows that _n_a_il_ does not rust in water that has no _a_i_r_ in it.

Method
Result
Conclusion
The potassium burns. Potassium reacts with cold water.
Sum up
• How can you do a scientific experiment successfully? First, we need to have an_____ aim and prepare apparatus for the experiment before we do _________ the experiment. methods Second, we must use correct________to do the experiment and watch carefully. result conclusion Then we can get the____and draw a________.
热时铁膨胀，故用一般现在时。
5.They will start their project
B
at
helping the poor children to be educated
in China’s west.
A.aims C.being aimed 解析 B.aiming D.aimed
分析句子知project和aim at之间是主谓
After the experiment,everything is put in
order in the cupboard. 3.这是我过去经常去游泳的小河。(where) This is the river where I used to go swimming.
4.To find out the truth,you’d better do it once by yourself.（不定式作目的状语）

forty-three
174,301— a (one) hundred and seventy-four thousand, three hundred and one
750,000,000— seven hundred and fifty million
2. 序数词的读法
序数词一般以与之相应的基数词加词尾-th 构成，如：tenth（第十）。但下面这些基 数词在变序数词时， 有特别的地方。如：
one — first two — second three— third five— fifth eight — eighth nine— ninth twelve— twelfth
3. 分数的读法
分子用基数词,分母用序数词;分子大于1 时, 分母的序数词后需要加s。
1/5
one fifth
1/7
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.
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：
1,001— one thousand and one 4,000— four thousand 9,743— nine thousand, seven hundred and

Practice
Activity 3 Describe the fractions as
percentages.
eg: A quarter is the same as 25 percent(25%).
Read these questions aloud and say the answers. 1. What is 1 / 2 of 6,000,000? three million
2. You use a ______to weigh the things you use in an experiment.
3. You use_____ to pick up things which are too hot or dangerous to pick up with your hands.
4. A ______is a ceramic bowl which you use to heat things to a very high temprature.
5. You put things into a glass_____ to mix, heat or keep them.
Work in pairs. Give your partner five sums. Use numbers over a million.
112,000 one hundred and twelve thousand
796,000 seven hundred and ninetysix thousand
879,457 eight hundred and seventy-nine thousand, four hundred and fifty-seven 1,000,000 one million 9,000,000 nine million 32,000,000 thirty-two million 212,000,000 two hundred and twelve