What is the amount of matter that makes up an object?

• A. Mass
• B. Matter
• C. Energy
• D. Velocity

Answer: (A)

Mass is the amount of matter in an object. It tells you how much stuff there is, which is why it’s the best answer when asked about the quantity that makes up something. Mass stays the same regardless of where the object is, while weight can change with gravity. For example, a rock has more mass than a feather because it contains more matter, even though their weights might differ on Earth versus the Moon. Matter refers to what things are made of, not how much of it there is. Energy is not matter, and velocity describes how fast something is moving, not how much matter it contains.