Scientific questions about the weather

1. The temperature on Mount Qomolangma is very low, and ice crystals are condensed by athletes' breath and water vapor emitted by their bodies.

2. Before it rains, the water vapor content in the air increases and the relative humidity increases. When it meets the outer wall of the water tank with low temperature, the water vapor will condense into water droplets, which looks like the water tank is sweating.