One of the most abundant elements, oxygen is vital to all life on Earth.
- Oxygen makes up 21% of Earth's atmosphere.
- Two-thirds of the human body is made of oxygen.
- Oxygen is essential for human, animal and plant life.
- Oxygen is colourless, odourless and tasteless.
Oxygen is a major component of our atmosphere.
Oxygen (O2) = 21% of Earth's atmosphere
Two thirds of the human body is made of oxygen.
As a gas, oxygen is odourless, tasteless and colourless, though as a liquid, it is pale blue.
Plants and animals rely on oxygen for respiration. Fish rely on dissolved ...
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