Multiple choice

If a liquid is heated from 20°C to 60°C, its density _____.

  1. increases

  2. decreases

  3. first increases then decreases

  4. does not change
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When a liquid is heated, its molecules gain kinetic energy and move farther apart on average, causing the volume to increase while mass stays constant. Since density equals mass divided by volume, increasing volume decreases density.

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