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When air is heated, it expands and ________.

A) lowers its pressure
B) explodes
C) burns
D) contracts
E) sinks

Answer :

Final answer:

When air is heated, it expands, becomes less dense, and typically lowers its pressure in an open system, leading to buoyancy and possibly creating convection currents.

Explanation:

When air is heated, it expands and becomes less dense, which is not listed as one of the provided options. However, this occurs because the air molecules move faster and spread out more, taking up more space. The proper answer that matches traditional understanding, therefore, would be that it lowers its pressure (Option A), but it's important to note that this can be context-dependent. For example, in a closed system, heating air could indeed increase its pressure. However, generally when air is heated in an open system, it expands and the increase in volume typically leads to a decrease in its pressure due to the air molecules being more spread out. This is complemented by the fact that heated air becomes less dense and tends to rise, creating buoyancy-driven convection currents. This concept is evident in natural phenomena such as weather patterns and artificially in devices like hot air balloons.

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Rewritten by : Brahmana