Question

the mass of an object is found by ____.
○ weighing the object
○ comparison with standard mass units
○ measuring the object
○ displacing water

Explanation:

To determine the mass of an object, we analyze each option:

• "Weighing the object" measures weight (force due to gravity), not mass directly.
• "Comparison with standard mass units" (e.g., using a balance scale to compare the object’s mass to known standard masses) is how mass is found, as mass is an intrinsic property compared via such methods.
• "Measuring the object" (like length/volume) doesn’t give mass.
• "Displacing water" finds volume (for density - related calculations), not mass.

Answer:

B. comparison with standard mass units