Unit 5 Lesson 26 Keep the Candle Burning 教案 2023-2024学年冀教版英语九年级全册.doc.docxVIP

Unit5Lesson26

教学目标

holder,shallow,lighter,match,examine,oxygen

①Letthecandleburnfortwoorthreeminutes.

②Whenthecandlestopsburning,ithasusedupalltheoxygenintheair.

③Howfardoesitrise?

④Becauseaboutonefifthoftheairismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.

核心素养

实践创新

1.劳动意识：能够用英语描述和解释本课的试验。

2.技术运用：在学习中，集中留意力，并乐观思考，培育同学宠爱科学的精神。

教学重点

把握本课单词，用英语精确?????地描述试验过程，通过听、读，反复呈现，试验操作突破重点。

教学难点

通过示范，试验操作来突破难点。

教学过程

一、导入新课

Leadin

Doyoulikedoingscienceexperiments?

Whyorwhynot?

Thinkaboutit

Whatwillhappenifyouputajarupsidedownoveraburningcandle?

Whatdoweneedtodotheexperiment?

acandleacandleholderlighter

amatchmatches

light(lit,lighted/lit,lighted)

点燃，使燃烧

burn(burned,burnt/burned,burnt)

燃烧

abigglassjar

ashallowdishwithwater

二、新课讲解

Readandanswerthequestions.

1.Howmuchwatershouldwefillthedish?

Halffullofthedish.

2.Howlongshouldweletthecandleburn?

Twoorthreeminutes.

3.Whereshouldweputthejar?

Putitoverthecandleuntilthetopofthejarrestsonthedish.

Listen

Part:Listenandanswerthequestion.

Whatishappening?

Thewaterinsidethejarrises.

Part:Readandanswerthequestions.

1.Whydoesthewaterrise?

Whenthecandlestopsburning,ithasusedupalltheoxygeninthejar.Sotheairpressureoutsidethejarisstrongerthanthatinthejar,andtheforceoftheairoutsidemakesthewaterinsiderise.

2.Howfardoesthewaterrise?

Onefifthofthejar.

三、语言点

1.Scienceissointeresting!

so为副词,“这样,如此”,用于修饰形容词或副词的原级,表示程度。常见用法如下:

(1)“so+形容词+a/an+单数名词”

“sucha/an+形容词+单数名词”。

(2)so后可接many,much,few和little来表示名词的数量。

(3)so…that…“如此…以至于……”

2.Lightthecandle.

light（lighted/lit,lighted/lit）v.“点燃”

lightup“点(烟),照亮”（代词放中间）

(1)lightn.“灯,光”。

(2)lightadj.“轻的,浅的”。

3.Carefullyputthejaroverthecandleuntilthepfthejarrestsonthedish.

until“直到”

①“直到......为止”，用于确定句，表示主句动作始终持续到从句动作发生或状态