Density is defined as the amount of mass in a certain:

• A. volume
• B. temperature
• C. length
• D. pressure

Answer: (A)

Verified step by step guidance

1. Understand the definition of density: Density is a physical property that relates the amount of mass an object has to the space it occupies.
2. Recall the formula for density, which is given by \(\text{Density} = \frac{\text{Mass}}{\text{Volume}}\).
3. Recognize that mass is measured in units like grams (g) or kilograms (kg), and volume is measured in units like liters (L) or cubic centimeters (cm\(^3\)).
4. Note that temperature, length, and pressure are not directly related to the definition of density, although they can affect density under certain conditions.
5. Conclude that density is defined as the amount of mass in a certain volume.