2021学年Module 5 A Lesson in a Lab教案配套ppt课件

这是一份2021学年Module 5 A Lesson in a Lab教案配套ppt课件，共21页。PPT课件主要包含了Module 5，Experiment，tongs ，crucible，dissolve，balance，test tube，高温使羊毛衫收缩，Preview等内容，欢迎下载使用。
ding an experiment
slid / liquid / gas
Bunsen burner（煤气喷灯）
1. (a) Water exists as a slid, a liquid and a gas. (b) Water exists as a slid and a liquid nly.2. (a) When yu heat a metal, it expands. (b) When yu heat a metal, it cntracts.
Guess, listen and check the answer.
Hw much d yu knw abut general science?
3. (a) Steel is a mixture f irn and ther substances. (b) Steel is a mixture f irn and xygen.4. (a) Tw-thirds f the earth’s surface is water. (b) 50% f the earth’s surface is water.
5. (a) The distance f the sun frm the earth is 25,5000 kilmeters. (b) The distance f the sun frm the earth is 150,500,500 kilmeters.6. (a) The earth is 4.6 millin years ld. (b) The earth is 4.6 billin years ld.
7. (a) The earth is twice as large as the mn. (b) The earth is frty-nine times larger than the mn.
Put the wrds in pairs r grups.
air – gas - xygen
cntract - expand
earth – sun - mn
gas – liquid - slid
air cntract earth gas liquid xygen mn slid sun expand
Answer these questins.
Which f the abve are natural? Electricity, irn, sme metals and air are natural. 2. Which are man-made? Steel, sme metals and glass are man-made.
electricity irn metal steel air glass
3. Which can be bth? Electricity and sme metals (allys合金 fr example) can be man-made and ccur naturally.
1. When yu heat a metal, it expands. expand vi. 膨胀，扩张e.g. ______________________________ in the sunshine.  许多花的花瓣在阳光中绽放。
The petals f many flwers expand
反义词cntract vi. 收缩 n. 合同e.g. The heat cntracted the wlen sweater. _________________ I’m ______________ t teach here fr ne year.  我按照聘约要在这里教一年书。
under cntract 
2. Steel is a mixture f irn and ther substances. mixture n. 混合物 e.g. The _______________ made me feel bad. 我喝了混合饮料后很难受。 mix v. 混合 mix A with B
mixture f drinks
substance n. 物质e.g. Beware f what yu d with __________________. 你处理危险品时，可要当 心。
dangerus substance
1. Preview VOCABULARY AND SPEAKING abut numbers and fractins n page 42.2. Preview GRAMMAR1,GRAMMAR2 abut the usage f degrees f cmparisn n page 43,47.
D exercises 5 and 6 n page 92.