Question

What's the relationship between the temperature and the density of a substance?
Question 14 options:

A)

As the temperature increases, the density decreases.

B)

As the temperature decreases, the density decreases.

C)

Temperature decreases the density of a substance only at high altitudes.

D)

Temperature doesn't affect the density of a substance.

Answer 1

A) As the temperature increases, the density decreases.

Explanation: heating usually causes substances to expand (volume increases while mass stays the same), so density (mass/volume) falls. Cooling generally increases density. (Note: there are exceptions, e.g., water's anomaly near 0–4 °C.)