Why do most rivers in Europe freeze only at the top

Answer 1

Most rivers in Europe freeze only at the top because the water at the top of the river is much colder than the water at the bottom. Colder water is more likely to freeze than warmer water. Additionally, the top of the river is usually more shallow than the bottom, which allows the cold air to reach the water more easily. The movement of the water also helps to keep the bottom of the river from freezing.