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中二科學(急) [複製鏈接]

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離線bella
 
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只看樓主 倒序閱讀 使用道具 樓主   發表於: 2007-09-26
— 本帖被 chy2003 從 家 課 交 流 移動到本區(2009-10-31) —
T/F
carbon dioxide is formed when fuels burn in air because most fuels contain carbon.    T/F

a fire blanket can put out a fire because it can lower the temperature.                                T/F

a fire extinguisher can put out a fire because it takes away all the three components
of the fire triangle.                                                                                                                            T/F

heat and light energy are given out in burning                                                                           T/F

                                    kid playing with fire results in accident
an 8year-old child played whit a fuel lighter and burnt his clothes. fortunately, his
father wrapped him with a wet curtain and the fire was put out . the boy was then
sent to the hospital...

1. how was the fire on his clothes put out?explain the principle.
__________________________________________

2.how can we avoid this kind of accident?
__________________________________________
離線牙然

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只看該作者 1樓  發表於: 2007-09-26
carbon dioxide is formed when fuels burn in air because most fuels contain carbon.    T/F

a fire blanket can put out a fire because it can lower the temperature.                                T/F

a fire extinguisher can put out a fire because it takes away all the three components
of the fire triangle.                                                                                                                            T/F

heat and light energy are given out in burning                                                                          T/F

                                    kid playing with fire results in accident
an 8year-old child played whit a fuel lighter and burnt his clothes. fortunately, his
father wrapped him with a wet curtain and the fire was put out . the boy was then
sent to the hospital...

1. how was the fire on his clothes put out?explain the principle.
wet curtain can seperate oxygen from the fire.  so, the fire is  put off as it lacks of oxygen.

我諗應該無錯掛
2.how can we avoid this kind of accident?
place the fuel lighter in a higher place where the children cannot reach.
1條評分
我不想飛翔,只是沒有立足的地方。
離線~瘋人~

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只看該作者 2樓  發表於: 2007-09-26
引用第1樓牙然於2007-09-26 12:57發表的 :
carbon dioxide is formed when fuels burn in air because most fuels contain carbon.    T/F
a fire blanket can put out a fire because it can lower the temperature.                                T/F
a fire extinguisher can put out a fire because it takes away all the three components
.......

水不是 lower the temperature 麼-__-?
即缺少heat-__-
1條評分
離線牙然

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只看該作者 3樓  發表於: 2007-09-26
引用第2樓~瘋人~於2007-09-26 13:03發表的 :
水不是 lower the temperature 麼-__-?
即缺少heat-__-

水可以降溫和隔開氧氣
是我講漏了....
謝謝你噢
我不想飛翔,只是沒有立足的地方。
離線惡夢の戀

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只看該作者 4樓  發表於: 2007-09-26
F2- -?
我F1果陣學緊...
離線bella
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只看該作者 5樓  發表於: 2007-09-26
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