Question

A glass of cold milk sometimes forms a coat of water on the outside of the glass (often referred to as 'sweat'). How does most of the water get there?

A) Water molecules from the air condense onto the outside of the glass.

B) Water molecules from the milk pass through the glass and condense on the outside of the glass.

C) Water molecules evaporate from the milk and condense on the outside of the glass.

D) The coldness causes oxygen and hydrogen from the air to combine on the glass forming water.

Answer 1

It is from condensation from the air

where the glass of cold milk is.

Answer 2

A) Water molecules from the air condense onto the outside of the glass.

Step-by-step explanation:

Water vapor will condense from the air, which means that it will slow down the water particles from the air to the outside of the glass. In that respect, thermal energy, caused by a rise in temperature, makes air particles to accelerate, hit each other and collide.