Question

1. if you heat most earth substances, what happens to their density? the density decreases 5. explain your answer to #4, why would that happen (think volume)?

Explanation:

When substances are heated, they generally expand (thermal expansion). Density is mass per unit volume ($
ho=\frac{m}{V}$). Since mass remains constant and volume increases upon heating, according to the density - volume relationship in the formula, density decreases.

Answer:

When most Earth substances are heated, their volume increases while mass remains the same. Using the density formula $
ho = \frac{m}{V}$, with an increase in $V$ and $m$ constant, density $
ho$ decreases.