Oxygen is a gas.so,it is not hard or soft.
Fluorine and oxygen are non metals. They pull hard the electrons.
Breathing is when your body is getting oxygen to your cells. When you are physically active your cells use the oxygen faster so you have to breathe faster to get the same amount of oxygen to your cells
butts
yes, if you have a hard time breathing.
Theres no freakin oxygen
yes it is there is no air on any of the famous planets
Oxygen is thinner at higher elevations .
Oxygen is thinner at higher elevations .
because its hard to breathe thin air above earths surface, the higher you go its hard to breathe oxygen.
I heard it's from lack of oxygen, but I had the same question!
little oxygen -c.e.m.r
Need more oxygen for respiration. more nutrients for muscle growth.