5. • 1. 有什麼的天氣因素 ?
What elements of weather were
reported?
溫度、濕度、風、能見度、雨量
Temperature 、
humidity 、 wind 、 visibility 、 rainfall
• 2. 天氣狀況如何 ?
How is the weather?
清涼、潮濕及有霧。
Cool, humid and misty.
8. 發問 : 你們知道下雨的原因嗎 ?
Do you know the reason of rainfall?
我們可以看一看有關的實驗片段 (0:30-1:28)
We can see the video that is about the
rainfall.
• http://resources.hkedcity.net/resource_det
ail.php?rid=2007155220
14. Note (book p.17)
• 雲由大小不同的水點組成，當雲中的水點
愈來愈大和愈來愈重時，便會降到地面，
形成 雨 。
• Cloud is made up of water droplets. When
water droplets gather and become
heavier, they fall as ___rain_____.
15. 水的三態
Three states of water
液態 - 水
Liquid state-water 氣態 - 水蒸氣
gaseous state – water vapour
固態 - 冰
solid state - ice
16. 比較煙和水蒸氣
smoke VS water vapour
煙 水分
smoke Water
燃燒物件產生煙
Fires things
produce smoke
水蒸氣 水分
Water vapour water
100℃ 的熱水
Hot water at
100℃
38. Sudden weather
change
天氣突變
颱風吹襲
Typhoon
http://www.youtube.com/watch?v=_1xkrK3X7gw
http://www.youtube.com/watch?v=_1xkrK3X7gw
Describe the weather condition when there is
Typhoon.
在颱風吹襲下的環境是怎樣 ?
Things were blown away. Some trees were uprooted. People were
difficult to hold the umbrella.
颱風吹襲時物件被吹起 , 樹木被吹倒 , 人們拿著風雨傘也吹歪
39. • Describe the weather condition when there is
thunder and lightning.
• 閃電打雷時的環境是怎樣 ?
http://www.youtube.com/watch?v=vySqIfaptvc&feature=related
The sky is very dark. Suddenly it has lightning and loud
sounds of thunder. Few people go to street.
天色黑暗，突然會有閃電和很大的雷聲 , 閃電打雷時街道上
行人較少 , 人們多會留在室內
閃電打雷
Thunder and lightning
40. 天氣會有怎樣的變化？
Different weather
你遇過以下的情況嗎？
How does the weather affect us?
颱風吹襲 閃電打雷
Typhoon Thunder and lightning
這些突變的天氣對我們有甚麼影響？
How does the weather affect us?
- 颱風吹襲時學生不用上學，惡劣的天氣影響船隻、飛機航行。
-students do not need to go to school when there is rainstorm, the
schedules or ships and flights are delayed or cancelled when there is a
typhoon.
41. 天氣會有怎樣的變化？
你最喜歡哪一種天氣？為甚麼？
Which kinds of weather do you like most? Why?
晴天 陰天 雨天
sunny cloudy rainny
炎熱 寒冷和大風
hot Cold and windy
天氣是會變化的，天氣情況會影響人們的生活。
Weather often changes. Different weather affects our lives.
42. 小結
Conclusion
天氣是會變化的，天氣情況會影響人
們的生活 , 如我們的活動及衣著。
Weather often changes. Different
weather affects our lives,
such as activities and clothing.
47. When severe weather comes, the
Hong Kong Observatory will issue
warning signals. Do you know the
warning signals?
當面對天氣惡劣 , 香港天文台會懸掛
一些警告信號 , 你們知道多少 ?
52. 天氣警告信號告訴我們甚麼資料？
What do weather warning signals tell us?
暴雨警告信號共分為三級。哪些信號在上課前發出，表示同學
不用上學？在 內加。要上學的，在 內加。
Under which rainstorm signal(s) should pupils stay at home?
Amber黃
Red 紅 Black黑
黃色暴雨警告 紅色暴雨警告 黑色暴雨警告
Amber rainstorm signal Red rainstorm signal Black rainstorm signal
市民應留意天氣報道， 學校停課。在空曠地方 學校停課。市民應留在戶
採取適當的預防措施。 工作人士應暫停戶外作 內 , 並到安全的地方暫避
哪個暴雨訊號所顯示的環境是最惡劣 ?
People should pay 業。 。
Which rainstormClasses will be
attention to weather signal describes the worst weather
Classes will be
reports and take suspended. People suspended. people
proper safety conditions?
working outdoors should stay indoors or
measures. exposed to rain should take shelter in a safe
55. When?
何時出現 ?
• occur during the months of May
to November, and are
particularly prevalent during
September.
• 在五月至十一月出現，九月尤為
頻密
56. Why there are tropical cyclone warning
signals?
為什麼要有颱風警告信號 ?
發出信號是為了警告市民熱帶氣旋帶來的
風力威脅。
signals are to warn the public of the threat
of WINDS associated with a tropical
cyclone.
57. 為甚麼颱風警告信號要分成不同的級別？
Why are there are different tropical cyclone
warning signals?
•表示颱風向和風力的強弱程度。
•To show the direction and strengths of
winds.
58. What do the directions blow the tropical cyclone warning
signal no. 8 indicate?
8 號風烈風 / 暴風信號下顯示的方位是表示什麼 ?
• The direction from which the tropical cyclones
are approaching HK
• 由信號的所示方向吹襲
59. 當天文台發出哪些信號時，學校要停課？在 內加。
Which signal(s) issued by the Hong Kong Observatory will
8 號以上颱風
lead class suspension? 信號。
停課
颱風警告信號 意義 class
Tropical cyclone warning signal Meaning suspension
1 號 /No.1 戒備 / Take safety measures
3 號 /No.3 強風 /Strong wing
8 號西北 /No.8NW 西北烈風或暴風 /NW gale or storm
8 號西南 /No.8SW 西南烈風或暴風 /SW gale or storm
8 號東北 /No. 8 NE 東北烈風或暴風 /NE gale or storm
8 號東南 /No. 8 SE 東南烈風或暴風 /SE gale or storm
9 號 / NO.9 烈風或暴風風力增強 /increasing gale or storm
10 號 / No.10 颶風 /Hurricane
60. Actions to take:
安全措施
用膠 紙條貼在當風的大玻璃
窗上
Use tape fixed to large
window in exposed positions
will reduce damage by broken
glass. Do not stand near Avoid staying in the street. Stay
windows. indoors.
避免逗留在街上
61. 颱風吹襲期間，為甚麼我們要不斷留意颱風消息？
Why we always need to pay attention to
the weather information?
- 可以根據天氣的變化，採取適當的
行動和安全措施。
Take appropriate safety measures under
different weather condition.
63. Very Hot Weather Warning
酷熱天氣警告
* 氣溫已上升至 33℃
*Temperature goes up to 33
適當措施 :
Actions to be taken:
應多喝水、避免長時間在陽光下曝曬避免中暑及曬傷．
Drink plenty of water and avoid over exposure under
sunlight reduce the chance of sunburn and getting
sunstroke.
64. 誰採取了適當 措施 ?
Who has taken appropriate actions?
酷熱天氣警告
Very hot weather warning
Drink plenty of water and using an umbrella
Over exposure under sunlight
多喝水和帶傘子
長時間在陽光下曝曬
穿著不合適的衣服和進行不適當
穿著合適的衣服和採取適當的措施
的活動，身體容易因不適應天氣
。
變化而病倒。
proper clothing and take She may get sunstroke because she
appropriate actions does not wear proper clothing under
hot weather
65. Cold Weather Warning
寒冷天氣警告
氣溫已下降至 12℃
Temperature falls to 12℃
適當措施 :
Actions to be taken:
多穿保暖衣服、應避免長時間置身在寒風中
Put on warm clothes 、 avoid over exposure to wintry
winds.
66. 誰採取了適當 措施 ?
寒冷天氣警告信號
Who has taken appropriate Cold weather
actions? warning
He may get sick because he does
Proper clothing: put on not wear enough warm
warm clothes clothes under cold weather.
多穿保暖衣服 穿著不足的禦寒衣服，身體容
易病倒。
67. 火災危險警告
Fire Danger Warning
* 天氣乾燥，火警容易發生
*Weather is very dry leading to a higher
chance of fire outbreaks
適當措施 :
Actions to be taken:
採取防火措施
Pay attention to fire precautions
68. 雷暴警告
Thunderstorm Warning
在不穩定及潮濕的大氣中，雲層內的水滴及
冰粒在對流活動中產生電荷。
適當措施 : water droplets and ice pellets in the cloud
will become electrically charged in
Actions to be taken: convective motion
1. 留在室內。 Stay indoors.
2. 切勿游泳或進行其他水上運動。
Do not swim or play water sports.
3. 切勿站立於山頂上或接近導電性高的物體。 Do not
stand on hill tops or near any highly conductive objects.
4. 樹木容易被閃電擊中，應盡量遠離。
Keep away from trees which are likely to be struck by
lightning.
69. 在惡劣的天氣下，我們應該怎樣做？
What should we do in severe weather?
在惡劣天氣下，下圖的小朋友做得嗎？對的，在 內加；
不對的加，並說說為甚麼。
Are the children doing right in severe weather? Put a or in the
打雷時站在樹下，容易 刮大風時留在室內活動
被閃電擊中。 ，較為安全
He may be hit by 下雨時游泳，容易被閃電 It is safe to stay
lighting if he stands 擊中。 He may be hit by indoors during a
under a tree. lightning if he swims thunderstorm
outdoors during a
thunderstorm.
71. • Conclusion
When severe weather comes,
The Hong Kong Observatory
______________________ will issue
Warning signals. We should
safety measures
take________________ to avoid accidents.
