Question

which phrase describes density?
○ height of a point above sea level
○ force pushing on an area or a surface
○ amount of mass in a certain volume
○ amount of matter an object contains

Explanation:

Density is defined as mass per unit volume. The first option describes elevation. The second option describes pressure. The fourth option describes mass. Only the third option, "amount of mass in a certain volume", aligns with the definition of density.

Answer:

amount of mass in a certain volume