AIR AND ITS USES
Air consists of one of the main life-sustaining gases named oxygen.
Human beings breathe in oxygen and breathe out carbon dioxide.
Air causes balloons to enlarge when filled with air and causes them to contract when air is let out.
AIR AND ITS USES
Air consists of one of the main life-sustaining gases named oxygen.
Human beings breathe in oxygen and breathe out carbon dioxide.
Air causes balloons to enlarge when filled with air and causes them to contract when air is let out.