Question

If the weather forecaster tells you that the pressure is falling, what is the air density doing? uncertain increasing decreasing remaining constant

Answer 1

The best answer to this question is decreasing. If the weather forecaster tells you that the pressure is falling, the air density is probably decreasing at the moment. Falling pressure just means that the mass of the atmosphere or the air density is totally decreasing.

Answer 2

The answer is; decreasing

When a particular geographical region is exposed to the sun for some time, the atmosphere is heated and the air mass in the region become less dense as it warms up. This is how low-pressure occur in the world. Wind from the high-pressure system (with denser air masses) begins to blow towards the low-pressure regions to replace the rising air masses.