The quickest way is to heat it up. You'd want a thermometer to help validate that gases are leaving the water and it isn't boiling (just check that the temperature is below 100oC), but if you see bubbles at those lower temperatures, it's air.
Alternatively, just leave a glass of water out for about an hour. Those bubbles you see on the inside of the glass were dissolved air.
It means that there is more water vapour that has been absorbed into the air. If this air then hits cooler air, it will rise and form rain clouds as the water condenses out. The cooler air cannot hold as much water vapour as the warmer humid air.
Water has a higher density than air. Anything that is less dense will float. The tube's covering is not enough to make it sink when filled with air. That is also the reason that oil and water don't mix.
The dragon fish breaths in air from the water so keep the tank well filtered, or have air bubbles.
Sound speeds up when it goes into water from air. Sound travels much faster in water than in air.
Humidity is the measurement of the amount of water vapour in the air.
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An acid (containing dissociable H+ ions
The three major gasses dissloved in ocean water are nitrogen, oxygen and carbon dioxide.
Solvent
Water, with surface tension and higher viscosity than air, will not show the smallest leaks air will show. For very sensitive testing, helium is also used. Water, with surface tension and higher viscosity than air, will not show the smallest leaks air will show. For very sensitive testing, helium is also used.
it can be dissloved by the legislative assembly of the concerned state.
thermometer
One way to show that water vapor is present in the air is by using a hygrometer, a device that measures humidity. The hygrometer will display the percentage of water vapor present in the air. You can also demonstrate this concept using a diagram by showing arrows representing water molecules in the air and indicating the percentage of water vapor present in relation to the total air molecules present.
get 2 icecubes that are similar sizes and put one in room temperature water and the other exposed to air.
One way to show that water vapor is present in the air is to cool the air. If the air temperature drops below its dew point, water vapor in the air will condense into tiny droplets, forming visible fog or mist. This process demonstrates that water vapor is a component of the air.
If you wanted to demonstrate the presence of water vapor in the air, wrapping an ice cube in foil would allow water to condense out of the air and onto the foil, due to the lower temperature of the foil compared to the air.
There are many ways to prove air has mass. One of them is : Take some water in a closed vessel and heat it till all the water boils. As we know when there is no transfer of particles mass remains constant. Therefore, the mass of the water vapour (air) is equal to the mass of the water taken. Hence, it is proved that air has mass.