Oxygen is a gas.so,it is not hard or soft.
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
Oxygen is a non-metal element, so it is considered a "hard" element. In chemistry, "hardness" generally refers to the ability of an element to form bonds with other elements. Oxygen typically forms strong covalent bonds with other elements, contributing to its classification as a "hard" element.
yes, if you have a hard time breathing.
because its hard to breathe thin air above earths surface, the higher you go its hard to breathe oxygen.
Oxygen is thinner at higher elevations .
yes it is there is no air on any of the famous planets
I heard it's from lack of oxygen, but I had the same question!
little oxygen -c.e.m.r
if your heart cant support the fast pumping, then it makes it hard for you to run...<3
Need more oxygen for respiration. more nutrients for muscle growth.
It makes it hard to breath and, if severe, lowers oxygen levels.