Question 3: why don't we see the Air when it's moving?@lovelystar

Chatgpt:

Air itself is invisible to the naked eye, regardless of whether it's moving or still. The reason we don't typically "see" air when it's in motion is because air is transparent and doesn't scatter or reflect light in the same way that solid objects or liquids do.

When you see something like smoke, dust, or steam moving through the air, what you're actually seeing are tiny particles suspended in the air, not the air itself. These particles are visible because they scatter light and can reflect or absorb enough light to be visible to us.

In everyday conditions, the air is usually clear and doesn't contain enough particles to be visible, even when it's moving. However, under certain conditions such as fog, mist, or in the presence of smoke or dust, you can observe the movement of air indirectly by seeing how these particles are carried along by it.