Ice can form on the tank, given the right environmental conditions.

But in those few minutes ice had formed again and the birds found nothing.

Thus, as ice forms it moves to the top of a lake.

Making matters worse, black ice can form when you least expect it.

Ice was now forming on the edge of the desk.

However, the ice forming on the surface of the waters was.

Sometimes ice will form all over Stutzamutza in a very few minutes.

Ice can form only if the proportion of water vapor in the cold air is particularly high.

Her lips felt stiff and ice cold as she formed the words.

Even so, club members quickly phone around when the ice forms black and thick after a cold snap.