Experiment 5.2 课本:pg54 (volume2)

Experiment 5.2
课本:pg54 (volume2)

sodium hydroxide > for absorbing CO2

?? wire gauze : separate the specimen and the sodium hydroxide.
red ink = indicator

Aim: to study oxygen used during respiration .

小强のtube :

xq 呼吸需要oxygen,吸了oxygen 变少了, CO2 被棉花吸(因为有sodium hydroxide)
导致瓶子里的气压低。瓶外的气压高,把red ink move towards test tube.


Test reaction :

glowing wooden splinter extinguishes (灭)
??? no oxygen

hypothesis : oxygen is used by living things during respiration

Form 1 _5.3 Oxygen is needed for respriration

Respiration 有两种:

External respiration : Breathing
Internal respiration  : Process of oxidising

↓   ↓    ↓    ↓    ↓    ↓

Glucose + oxygen → energy + Carbon dioxide + water

Glucose from ( food )
Oxygen from ( Air )

Energy is used :


  1. to carry out daily activities .
  2. sythesis(制造) of liquid of lipid (脂肪)and protein .
  3. enables movement.
  4. basal metabolic rate ( minimum daily energy requirement ).

★③ ⑦月②⑤日

LOL
long no update my blog + poem le jor ~
sick ..
won't go to skul but on9 >.<
finish repairing my cp ,
sdo cant use arhhh!!!