This just CAME IN!!!

I called jae san and this is wat i got: The j-tube one is form 4 chapter 7 the very freaking long long wan.... if u using pelangi form 4 go check pg 176. Its title is investigating the difference btwn the inhaled and exhaled air. The procedure is freaking long wan loh and must have the j-tube one.

While the other is study the effect of air movement on the rate of transpiration.
Longman 4&5 pg 462. The one whre is used to check see whether the transipiration works one.
REmember to tell all S7!!!