课件24张PPT。Do you know them?Albert EinsteinStephen hawkingMadam CurieAlfred NobelThomas EdisonLi ZhengdaoCharles DarwinNewtonMatch the following words.1.physics
2.chemistry3.biologyAlfred Nobel
Darwin
Li ZhengdaoThomas Edison
Albert Einstein
Newton
Madam Curie
Listen and choose. P411.(a) Water exists as a solid, a liquid and a gas.
(b) Water exists as a solid and a liquid only.
2.(a) When you heat a metal, it expands.
(b) When you heat a metal, it contracts.
3.(a) Steel is a mixture of iron and other substances.
(b) Steel is a mixture of iron and oxygen.
4.(a) Two-thirds of the earth’s surface is water.
(b) 50% of the earth’s surface is water.
5.(a) The distance of the sun from the earth is 25.500 kms.
(b) The distance of the sun from the earth is 150,500,500
kms.
6.(a) The earth is 4.6 million years old.
(b) The earth is 4.6 billion years old.
7.(a) The earth is twice as large as the moon.
(b) The earth is forty-nine times larger than the moon.Put the words in pairs or groups.contract air earth gas liquid oxygen
moon solid expand sunair – gas - oxygencontract - expandearth – sun - moongas – liquid - solidoppositeheavenly
bodyPut words in the right place.electricity iron metal
steel air glasselectricity iron air some metalssteel glass some metalselectricity some metalsVocabularypotassium
(钾)Let’s get to know some metals?ksodium(钠) calcium(钙)magnesium(镁)NaCaMgaluminum
(铝) zinc(锌)iron(铁) copper (铜)ZnCuAlFeLook at the pictures. Do you know the names of the equipment?tongscrucibletest tube balanceBunsen burner 1.You use a ________________to heat things when you do an experiment.
2.You put things into a glass _________to mix them, or to heat them, or to keep them.
3.You use a_________ to weigh the things you use in an experiment.
4.A ________is a ceramic [ si‘r?mik] (陶瓷的)bowl which you use to heat things to a very high temperature.
5.You use ________ to pick up things which are too hot or dangerous to pick up with your hands.Bunsen burnertest tubebalancecrucibletongsWhen do you use them? Use the equipment to fill the blanks. Science plays an important role in our daily life. So we should love science. And we should own the scientific attitude towards our work and study.
科学在我们的日常生活中非常重要,我们应该热爱科学,并且我们应该拥有一种科学的对待我们学习和生活的态度。英语中基数词、序数词、分数、小数和百分数的读法How to say the cardinal numbers, the ordinal numbers, fraction, decimals and percent.1.基数词的读法:A. 先说“几十”, 再说“几”,中间用连字符。如:
23— 89—B. 先说“几百”, 再加and,再加末两位数(或末位数)。如:twenty-three eighty-ninetwo hundred and twenty-threefour hundred and sixteeneight hundred and nine223—
416—
809— C. 1000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—
4,000—
9,743—
174,301—
750,000,000— one thousand and onefour thousandnine thousand, seven hundred and forty-threea (one) hundred and seventy-four thousand, three hundred and oneseven hundred and fifty million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:2.序数词的读法 one — two —
three— five—
eight — nine—
twelve—firstsecondthirdfiftheighthninthtwelfthWe write
1/5
2/3
3/7We say
one fifthFraction分数表达法式:分子要用基数词,分母用序数词,如果分子大于一,分母必须用复数形式two thirdsthree seventhsFraction分数We write
We say
一些特殊的分数表达1/4
1/2
3/4a (one) quartera (one) halfthree quartersDecimals小数We write
We say
0.5
2.5
18.27zero point five/point fiveeighteen point two seventwo point five表达法式:小数点以前按基数词读出,若整数部分为0可读作zero或nought,也可以不读;小数点读作point;小数点后按基数词分别单个读出。小数点后的0通常读字母O的音。百分数表达方式:%前是什么就读什么,读了之后加上百分号(%)percent就可以了。Percent百分数We write
We say
27%
6%
0.68%twenty-seven percentsix percentzero point six eight percentLet’s practice some numbers
5/7
4/5
15.2%
0.06%
45.3
9.2
15.154five seventhfifteen point two percentzero point o six percentforty-five point threenine point twofifteen point one five fourfour fifthsThank you!