Question

how the anomalous expansion

Answer 1

Anomalous Expansion of Water: A common trend seen in substances through out, is the fact that all substances expand when they are heated and their density decreases and vice versa and when you cool something, it contracts and increases in density

Answer 2

the anomalous expansion of water is an abnormal property of water where by its expands instead of contracting ,when the temperatures goes from 4°c to 0°c and it becomes less dense