https://www.youtube.com/watch?v=4UnhGLx3Czg
Chapter 20 Air and Burning
ETV: air BURNING
https://www.hkedcity.net/etv/resource/1307148201
ETV: Preventing and Extinguishing Fire
https://www.hkedcity.net/etv/resource/1420464095
Fire prevention VIdeo (11 mins)
https://www.youtube.com/watch?v=6jBEqcxmt9E (3 mins)
Fire Service Department Youtube Channel
Chapter 21 How living things obtain energy
Basic Metabolic Rate Calculator
Expt 21.1-2 result S2B https://goo.gl/photos/Qov9sWChpy4FtuDL6
Chapter 28
Acids & Alkalis
https://www.hkedcity.net/etv/resource/724107303
Resourceful web site