if you take balloon and water in a small-bowl and pour it in a weighting machine on one side and other side keep the balloon then the balloon will weight.
The classical definition says anything that occupies space is matter. To prove air occupies space we can do a small experiment. Take a balloon and blow air in it. The balloon expands and this proves that air occupies space. And thus we can prove air is matter.
There are lots of ways you could go about proving that, but here is one: Take two identical jars and put them on a scale. They should weight the same. Then, use a vaccum pump to suck the supposed air out of one of the jars. Weight them again (with a sensitive enough scale), and the one with air sucked out will be lighter. Surely proving that something has weight is enough to prove that it exists. Here is another: Open up a zip-lock bag to let the hypothesized air in, seal up the bag, and then try to flatten the bag. Something pushes back, stopping you from flattening it like you could with an empty bag. This something must be the air.
Anything with mass has weight; air has mass, therefore it has weight.
Well, Oxygen is in the air. You can prove that it is because we would all be dead. We breathe Oxygen. Answer - You can prove that Oxygen is in the air because without it we would die, and if you didn't already know, we are breathing it right now. Hoped This Helps :/ -Sara-
air has weight
he dropped them to prove that gravity pulls things down at the same speed no matter what their weight
Air has weight because it is made up of molecules that have mass. The weight of the air is due to the gravitational force pulling down on these molecules. The more air molecules present in a given volume, the greater the weight of the air.
The weight of air is called atmospheric pressure. It is the force exerted by the weight of the air above a given point in the atmosphere.
Condensation, freezing the air.
One way to prove that air is in water is to observe the formation of bubbles when water is agitated or heated. These bubbles are composed of air that was dissolved in the water. Another method is to measure the oxygen or nitrogen content in water, which indicates the presence of air.
By measuring it's different components
fly a paper air plane