Fill This Field
Sign In
Sign Up
Main Menu
Home
Primary
Primary Seven (P.7)
Ordinary
Senior Four (S.4)
Advanced
Senior Six (S.6)
Discussion Forum
Blog
Sign In
TOPIC:
Respiratory System
Topics
Digestive System
Electricity and Magnetism
Simple machines and Friction
Excretory System
Respiratory System
Energy
Plants
Environment
The teeth
Animals
Health
Question
1
out of
5
Which part of air is left unchanged during respiration?
Nitrogen
Rare gases
Oxygen
Carbon –dioxide
NEXT
Fill This Field
