Respiration and photosynthesis.
The gas concentrations in atmosphere are large. Even if we try, we can change small amounts.
Air is a mixture of gases, which includes nitrogen, oxygen, and smaller amounts of other gases. It is not a solid or a liquid.
Hydrogen gas only exists in the atmosphere in trace amount. The hydrogen in water vapor, which is more abundant, is chemically bound to the oxygen in the molecule and thus require large amounts of energy to extract.
Air (carbon dioxide in nitrogen)
Helium is a light colourless gas that does not burn
the cold air can change the carbon dioxide gas to a solid
Sometimes the foods that we eat produce gas due to the digestive processes. This air can escape through the mouth or bowels.
When light passes from air into a gas, its speed and direction may change depending on the properties of the gas. This change in speed and direction is known as refraction. Additionally, some of the light may be reflected back at the boundary between the air and gas, causing part of the light to bounce off.
Because the air is coming inside the balloon.
Air is approximately 20% oxygen. The most common gas in air is nitrogen at 79%, with variable amounts of water vapour and small amounts of other gases such as argon and carbon dioxide. So, in short, no.
Gas hydrates are a potential future energy source, as they contain large amounts of methane that could be extracted for use as fuel. They are also studied for their possible role in climate change, as they could release methane - a potent greenhouse gas - if disturbed or warmed. Additionally, gas hydrates have been investigated for their potential applications in gas storage and separation processes.
A liquid can change to a gas, by heating up and evaporating into the air.