The boiling point of oxygen is -183 degrees Celsius. Because it is this low, oxygen will always be a gas at room temperature.
Oxygen is main gas of earth. If there is no oxygen in the earth all the life in the earth should die.
The gas in earths atmosphere that suggests that there is life on Earth is oxygen. However carbon dioxide also shows that there is life on Earth.
Gas?
Oxygen
a gas
oxygen
no
Oxygen
oxygen
oxygen
Oxygen
oxygen