Multiple choice

When water is heated from 0°C to 20°C, how does its volume change?

  1. It increases

  2. It decreases

  3. It increase first and then decreases

  4. It decreases first and then increases
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water reaches its maximum density at 4°C. When heated from 0°C to 4°C, the volume decreases as density increases. From 4°C to 20°C, the volume increases normally as density decreases with heating. This anomalous expansion is unique to water.

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