make an experiment to show that air has mass? guys!! but don't explain it with the examples of balloon because this is done with my friends but I need another example for showing this experiment so don't give the answers about balloons ok....
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Answer:
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Step-by-step explanation:
In the first activity, two balloons filled with air, will be used to create a balance. Inflate the two balloons until they are equal in size and tie them off. Attach a piece of string to each balloon. Then, attach the other end of each of the strings to the opposite ends of the meter stick, keeping the balloons the same distance from the end. The balloons will now be able to dangle below the ruler.
Tie the third string to the middle of the meter stick and hang it from the edge of a table or support rod. Adjust the middle string until you find the balance point where the meter stick is parallel to the floor. Once the balance scale set-up is completed, the experiment can begin.
As the kids sketch the set-up, ask them to predict or make an hypothesis about what will happen if you were to poke a hole in one balloon. Do so and encourage them to record their observations in words or pictures in their journal.
The balloon that remains full of air will cause the ruler to tip showing that the air has weight. The empty balloon’s air escapes into the surrounding room and is no longer contained within the balloon. The compressed air in the balloon has a greater weight than the surrounding air. While the weight itself cannot be measured in this way, the experiment gives indirect evidence that air has mass.
CO2 is Heavier than Air
Another fun demonstration you can do easily at home illustrates that carbon dioxide gas is heavier than air. It takes a little practice but once you’ve got it down it’s pretty fun! You’ll need two glasses, baking soda, vinegar, and a small candle. Measure a tablespoon of baking soda into one glass. Light the candle. Measure a tablespoon of vinegar and pour it into the glass with the baking soda. Allow it to bubble for a moment and generate the carbon dioxide gas. Depending upon the size of your glass, it may bubble over. No worries.
When the bubbles have receded a little, carefully lift the glass and pour the carbon dioxide gas into the second glass. Be careful not to pour the liquid; you won’t actually see anything pour – but trust me. Then, gently lift the second glass (which appears to be empty) and pour it over the burning flame. In just a few seconds, the flame will be extinguished.
In order to burn, fire requires oxygen. Fires start when a flammable material, in combination with a sufficient amount of oxygen gas (or another oxygen-rich compound), is exposed to a source of heat, and is able to sustain a rate of rapid oxidation that produces a chain reaction (the fire tetrahedron). Fire cannot exist without all of these elements in place and in the right proportions. When the carbon dioxide gas is poured from the glass, gravity pulls it down and it pushes the oxygen rich air away. Without oxygen, the flame is extinguished.
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