Why does smoke-like vapour come out of our mouth during winter?

From where do water drops come on the leaves and grasses, as seen in the diagram below?

Take some water in a glass. Add some pieces of ice to it and wait for a few minutes.

What changes do you observe on the outer surface of the glass?

Take some water in a glass. Add some pieces of ice to it and wait for a few minutes.

Why are the water drops formed on the surface of the glass?

Take some water in a glass. Add some pieces of ice to it and wait for a few minutes.

Do drops of water form if there is no ice in the glass?