Which statements describe density? Check all that apply.

Question

Density is a chemical property of an object.
The density of an object is constant.
Density is a derived unit of measure.
Density is the sum of the mass and volume of an object.
The density of an object determines whether it will sink or float.

Answer 1

Here are the statements that accurately describe density:

1. Density is a derived unit of measure.
   This statement is true. Density is calculated as mass per unit volume (e.g., grams per cubic centimeter or kilograms per liter).

2. The density of an object determines whether it will sink or float.
   This statement is true. An object will float in a fluid if its density is less than that of the fluid; if its density is greater, it will sink.

The other statements are not accurate:

• Density is a chemical property of an object.
  This statement is false. Density is a physical property, not a chemical one.

• The density of an object is constant.
  This statement is not entirely true. While the density of a homogeneous substance under constant conditions (temperature and pressure) is constant, the density can change with changes in temperature, pressure, or the object's composition.

• Density is the sum of the mass and volume of an object.
  This statement is false. Density is not the sum of mass and volume; it is the ratio of mass to volume (mass/volume).