Natural Resources — Air, Water, Pressure

Air, atmospheric pressure and water resources.

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Q1 · Natural Resources — Air, Water, Pressure · EASY
A child blows air into a balloon and ties it. After some time, the balloon becomes smaller. What does this observation tell us about air?
Q2 · Natural Resources — Air, Water, Pressure · MEDIUM
A teacher demonstrates that when a tumbler filled with water is covered with a cardboard and inverted quickly, the cardboard does not fall and water does not spill. Which property of air is primarily responsible for this?
Q3 · Natural Resources — Air, Water, Pressure · MEDIUM
In a village in Maharashtra, the water table has dropped significantly over the past 10 years. Which of the following is the most likely cause of this problem?
Q4 · Natural Resources — Air, Water, Pressure · HARD
At sea level, atmospheric pressure is approximately 101,325 Pa. A mercury barometer at this location shows a reading of 76 cm of mercury. If the same barometer is taken to a hill station at 2000 m altitude, what change would be observed and why?
Q5 · Natural Resources — Air, Water, Pressure · HARD
At what depth underwater does the pressure approximately double compared to atmospheric pressure at sea level?