1970-03-01 — Page 15

育教僑頁三第張ㄖ第 日四廿月正年戌庚靨

REFORLICE LIBRARY

1 MAR 1970

WALT 日僑華

HALPO

B享在光合作用四條件中獨缺二氧化碳(因三角瓶內 氫氧化納把瓶內二氧化碳吸去)经碘液試驗,得 知無澱粉存在故3葉沒有光合作用進行

證明光合作用時必要陽光

A用具(略)

錫箔一

經處理技除

B

去錫箔摘下¿洋葵葉

中文中學會考試題預習專欄

c. 材料:洋藝

天之洋葵

生物科(十七)

方法

英愛桐

经固定脱色

·檢驗業內有無澱粉存在之方法:

取一片錫箔 (剪有通花的 更佳)另取

素手續後之洋葵葉

4用具:石棉網、 三脚樂。

燒杯(100

3藥品:乙醇碘液

C材料:洋葵-盆

>方法。

熱水

·丹葉(綠色)

-A (淡黃色)

·日葉(綠色)

-B薸(淡茗色)

饭一片已行光合作用五小時的洋菜,定為A業。 另取一片已置暗室廿四小時的洋葵葉,定為日葉。

2.A.B葉置在沸水内一分鐘,目的使掌的細胞死去並不被

壞表皮之蜡質膜。此時二葉似為綠色.

3 再将此=葉社酒精肉(必須水槽が熱装 買如圖),經若干時間(約一小時)酒精使曹把等內 葉綠素溶去,此時二葉為淡黃色。

脱色後取出,以水洗滌

結果

葉柄上磯液

A紫由黄色变紫蓝色,日菜没有大变化

F結論

光合作用之反應式為,

6C0, * 12H,0 ***CotiaO6 + 68,0+60. ↑ “故有光合作用時,葉內便有葡萄糖產生,由共一個份上葡 萄糖,各胜去-分子水 彼此相連而成澱粉(CatHieOf) 有於葉內,故植物行光合作用時,蒙內便冇澱粉存積澱 粉之生成反應式為:(CHO). -(CelleOrn+ nH,C 2由上項碘液試驗結果得知A掌存有澱粉。

·碰明光合作用時必要二氧化碳。

A. 用具,三腳架,本生燈,三角瓶\\\\

膠塞,木塊,燒杯,石棉

網

日药品:氫氧化鈉;碘液,

照

膠囊 氧化鈉.

凡士林 酒精

C材料:洋葵-盆

口方法:

取盛有氫氧化鈉溶液之三角

瓶以未塊架着,然後取一盆已置暗室24小時的洋葵!

葵(目的 使葉門澱粉消除)以特備膠塞(如圖)夹着其中一葉之 葉柄,並塗上凡士林,放入三角瓶內,膠塞則封密瓶口其 装置如圖,瓶內之葉定為日葉

2 把此装置放在陽光下照晒五小時,然後摘下日菜,再

在植物摘下另一片葉定為ᅀ葉(有行光合作用之葉》

3 把A,日= 葉放在沸水中一分鐘,使葉內細胞死去,並破

壞表皮之蜡質膜,此時葉们為綠色:

4. 把A.B. = 葉移放熱酒精中使晚去葉內葉綠素,39経 ̇小時, = 葉由.斬变為淡黃色,

「脱色後取出以水洗滌。

6.二葉加上碘液

結果: A菜由黄色变為紫色日常没有大变化 -

F結論:

十同第一題之結論上

2.由上装置, A葉原来有事綠系,跌于空闲中有二氧化碳, 有陽光照 日晒盆內有水分,經碘液試驗得知有澱者 存在,故A葉有光合作用進行。

生一天的洋

紫藍色

淡黃色~

再加上碘

𣶏乏洋葵素R

葵萬字丸把錫箔夾在洋餐其中的一塊靠上裝置如图。 2.把此裝置放在陽光下照晒五小時,然後捐下此要處理之葉

3.把此葉放在沸水中一分鐘,使靠向細胞死去並破壞表皮

之蜡質膜,此時菜仍為綠色

再把此繁置煮酒精中,使脱去禁內禁

心绿渐变为浅黄色。

「脱色後取出,以水洗滌

6.加上碘液

·結果,此葉接受陽光之部分变紫蓝色,有锡纳盖看的部分汲

有大变化。

产結論、(自習不解答)

→證明光合作用時必要紫綠茶,

A用具:三脚架,本生燈、燒杯、石棉網

3葯品酒精

●材料:洋紫

綠色部分

・部分

>淡黄色

白色

部分:

已强太膠丸小時後 ・固定騰色

手續拨

·摘下王洋紫蘇葉

D方法:

1.把洋紫蕊植物放在光下晒五小時,然後摘下其中一菜。 2.把此菜放在沸水中一分鐘使菜内细胞死去,並破壞表

皮之蜡贺膜,此時蔡仍為綠色。

再把此菜移放無酒精中,使脱去菜的更紧,約經 時景田綠渐变為淡黄色.

4 脱色後取出此菜,以水洗滌

5.加上碘液:

結果

此葉原來位邊綠綠色部分变紫蓝色,原来红之部分有 少許变紫蓝色,而弥來白色部分沒有变色

F結論:(自習,解答)

1.證明光合作用時放出氧氣

A 用具: 材料:

上方法:

-氧泡

漏斗:

含有CO三水 黑藻

取大燒杯盛满水,然後以玻璃管用口” 於水中,約之 分鐘,使水中含有二氧化碳。

2.取生長旺或里藻-條置水中,並以漏斗架於其上。

以試管一支盛滿水倒插於境杯水中,並套着漏斗巰于 是試管内克漏水,成一水柱,其装置如圈、

1.把此装置於陽光下,不久就見從里落處有氣泡升起

利用排水集氣法把此氟体收集。

5.約過數小時 試管的已收集大量氧体,然後迅速职以試 管,以大姆指壓着試管口,再取一支存有餘塩之木條迅速 插入試管内,则见餘燼復燃

結論:(自習,不解答)

日熊星一日一月三年〇七九一瑟公年九十五國民華中

(接第四嘎第二頁)

LO英文中學會考試題預習專欄

堅道英文書院主編 經濟及公共事務科

(十七)

Question (2) What do you understand by ETV? Dia‹

Answers

ETV is the abbreviation of edusakional television, by which is meant the system of bringing education to A PAZIon Via the television through such programmes as documentarios, news, features and semi-frictional series that enrich the mind, as it is prevalent in most advanced countries in the wo

world today. Here in Hongkong, My is however rastrioted to the meaning of using the local television stations (the Television Broadcast Ltd,, and the Rediffusion Television (HK) Ltd.) to moreen lessons which are essentially based, on the syllabuses and examination requirements as set out by the Education Department.

Recently Government has annoukosa TORT AN initial sman of $3.7 million will be spent on thầ construction of two television studios in Lung Cheung Road in the vicinity where the studios of TVB and RTV are presently situated.

Another $3.7 million will be spent on installing receivers in föveranent and Government-aided Schools.. Private, schools however will have to install their own television nets.

The idea behind this proposed expenditure of $7.4 millions by Government is to enable the Education Department to provids ETV by September 1970 when the now ncademia year starts. ETT will cost tax-payers on annual sum of $1.6 million for its maintenance.

A new educational televisione pe

established and will be affiliated to the Education. Department, and which functions under the direct control of the Director of Eduostisa, This unit will be staffed by senior education specialists who have (or will be trained to have), broadesating and television production and presentation techniques' v

STV will produce twenty lessons per week, covering four main subjects -- English, Chinese, Science and EPA --- at both primary and Secondary. levels. A saull secondary television mit will exist to produce particularly lessons on EPA which will take the ferm of documentary films on important aspects of Government activition and the work and2 funotions at Government Departments.

Detailed notes and explanations on vue Lessons will be put aut on sale, so that viewers can follow each lesson with ease and greater understanding.

At least a total of 160,000 pupils in both primary and secondary schools that are zun or, aideds

by Government will benefit by KTV BUY 17 18 ezpactad that private schools will install their own sets thum widening the initial ETV audienos, and many more regular television viewers who are no longer studenve will also greatly benefit.

The sew Education Television Unis will videotapa their lessond well in advanos and supply them free to both TVB and RTV. Both local stations will have to allot regular time for these programass to be transmitiad. It is expected that Primary lafsons will be repeated twice on the same day as most primary schools are bi-sessional. It may, however, not be noosnuary te repeat Secondary lesnens. As Most secondary roboole care whole-day eahoods.

ETV will help to raise the standard of education in Hong Kong. It is reliably believed that out of about 33,000 teachers in Hong Kong #lightly under 50 por cent (15,000) are unqualified professionally, that 19, they have not been trained in teachers' training collcgon or have not received university education, oz Lf they have their degrees are not locally recognised. ind of the 18,000 odd teachers with recognised quali➡ fications, very f

fax are specialist teachers.

ETV programmes will provide a means by which sembora of the teaching profession will have a chanas to watch how model lessons on English, Chiness, Science and EPA are conducted by specialist imtrusTORE.

Students on the other hand will have a chance to learn with more up-to-date visual aids, and in the SPA 109son, they will be able to learn Government activities and the work of Government departments at first hand, with the degree of insecuracy, reduced to the minimum. -

ETV programmes will break new grounds by providing lessons in the four mentioned subjects with fresh and more interesting approach to the teaching of the subjects as opposed to the so-called traditional on and talk method. Pupils, can thus be easily stimulated in their initial interest for learning, Teachera, on the other hand, can thus be guided and be given now ideas to improve their classroom teaching.

ETV lessons, however, cannot replace the olass room teacher, who is in fact more nooded now than

before, in order to act as a counsellor to his pupils,

preparing them ready for the ETV Lessons, and

wharovar possible to advise or axplain to the

on certain points or problems arising from the ETV

Leasons. It is quite impossible for pupils to watoh

FTV lesson without the presence of their tsscher, who can also discuss with his pupils on follow-up material after ea

each ETV.

The fact that animation, film clips, props,

photographs, and graphics will be used to maką ETV programmes rich and imaginative is evident that pupils now find Learning at school no longer boring but full of fun.

szeroine No. 17

1) How does the Post urtice serve a modern

community?

2) What are the chief characteristics of man's wants,

and how are they met?

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真四第張四第二日四廿月正年戌庚歷

WAH KD YAT PO