中一科學問題!!!急用...快

1.a) When you closed the air hole and turned on the Busen Burner, yellow flame will occur. It is quiet and with a regular shape. When you open the air hole, a blue flame will occur and it will make noise, it has a regular shape.

1.b) First, turned on the gas tap, at the same time, light up the matches or lighter onto the chimney, soon there will be a yellow flame.

1.c)Remember to close the gas tap after used, never leave a blue flame when not used. Do not touch the chimney when the air hole is opened. If you want to used the Bunsen burner later, turn it into a yellow flame which has a lower temperature.

1.d) The reason why is because when if you open the air hole before you burn the chimney, STRIKE BACK may occur. The flame wikll turn into a green one aand it will make a very loud noise. It is very dangerous.

2.Variable (變數) included controlled variable, independent variable and dependent variable. Controlled variable is some factor you will remain unchanged. Independent variable is some factor you will change and dependent variable is the thing you are going to measure.

4.First, pour the liquid in a test tube into a beaker. Then, mix the solutions with a glass rod. Finally, pour it back to the test tube and shake it slightly.

5.1.to stir a solution in a beaker 攪拌燒杯中的溶液 (glass rod)
2.to store a solution 存放溶液 (Conical Flask)
3.to hold a test tubewhile it is being heated 握着加熱中的試管 (test tube holder)
4.to pick up small,hot soilds 提起小而炙熱的固體 (tongs)
5.to collect a gas 收集氣體 (Gas Jar)
6.to move a small amount of power from one countainer to anoother (spatula)
7.to measure the temperature of a liquid 量度液體的溫度 (thermometer)
8.to transfer some amount of liquid 轉移少許液體 (Dropper)
9.to measure the volume of a liquid 量度液體的容量 (Measuring Cylinder)
10.to protect your eyes 保護雙眼 (safety spectacles/safety goggles/protection goggles/goggles)
11.to heat substance 加熱物質 (Bunsen Burner)

2009-01-15 17:49:11 補充：
3.Test tube -- to place small amount liquid
test tube holder -- to hold the test tube when boiling
Bunsen burner -- to heat things
tongs -- to hold small things
Boiling tube -- to boil some liquid
Conical Flask -- to place large amount of liquid, usually the dangerous ones.

2009-01-15 17:49:21 補充：
Filter paper -- to do filteration
Dropper -- to transfer liquid
test tube rack -- to place test tubes and boiling tubes
Heat-proof mat -- Put under a Bunsen burner when used
Tripod -- placed over the Bunsen burner, we put wire gauze on it

2009-01-15 17:49:31 補充：
wire gauze -- place on the tripod, we put beakers on it
beaker -- large then boling tube and test tube but smaller than conical flask
Stopper -- put on the opening of the test tube to prevent air and liquid come out (or go inside)

2009-01-15 17:49:35 補充：
Thermometer -- measure the temperature of the liquid
Measuring Cylinder -- measure the volume of the liquid

1.a) 本生燈係唔同色[藍色同黃色]既時候既特徵分別有咩?!
[例如有冇聲,,規唔規則...反正你知道有咩特徵就講na]
-唔同顏色時, 藍色係不發光既火焰,黃色係發光的,同埋黃色既溫度係高過藍色既, 黃色係不規則, 而藍色係規則既.

1.b) 使用本生燈既開啟次序[要簡略d,,,唔好成篇文字]
1.將個本生燈放係個heat-proof mat(1塊硬既版)上面
2.戴個護眼罩
3.關左個air hole
4.點著支火柴
5.開本生燈個開關制
6.整熄支火柴
7.開放大約1/3既air hole

1.c)使用本生燈既注意事項
-唔好將d易燃既野放係本生粒附近
-要tie up好條tie / 頭髮
-唔好冇人睇住個火
-唔用個陣, 教返個火做藍色

1.d) 點解燃點本生燈前要將氣孔關閉!?
-因為唔關個air hole, 1點著個本生燈就會好大火


2.變數既名。特點。例子。
-sor, 唔知

3.各種主要科學用具既用途[F1教個D]
-glass rod(拎黎搖勻d solution)
-test tube(放solution)
-test tube holder(夾左支test tube)
-test tub rack(放test tube)
-dropper(吸個d solution)
-beaker(放solution)
-conical flask(裝solution既容器)
-wire qauze()
-reagent bottle(裝solution既容器)
-tongs(拎黎鉗野)
-clamp and stand(支架)
-tripod(拎黎放野係上面//用bunsen burner個陣)

4.點樣將試管中的溶液搖勻?!
用glass rod

5.將尼d野變成中英對照同埋答係咩用具
1.to stir a solution in a beaker(glass rod)
2.to store a solution(reagent bottle)
3.to hold a test tubewhile it is being heated(test tube holder)
4.to pick up small,hot soilds(tongs)
5.to collect a gas(gas jar)
6.to move a small amount of power from one countainer to anoother(spatula)
7.to measure the temperature of a liquid(theormometer)
8.to transfer some amount of liquid(dropper)
9.to measure the volume of a liquid(measuring cylinder)
10.to protect your eyes(safety goovles)
11.to heat substance(bunsen burner)