The amount of matter in an object.

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Study for the California Science Test. Get ready for the 8th grade exam with flashcards and multiple choice questions, each question has hints and explanations. Prepare with confidence!

Multiple Choice

The amount of matter in an object.

Explanation:
Mass is the amount of matter in an object. It tells you how much stuff there is and stays the same no matter where you take the object. Gravity affects weight, not mass, so an object’s weight changes with location (for example, on the Moon it weighs less), but its mass stays constant. We measure mass with a balance or a scale that compares the object to known masses, using units like grams or kilograms. Volume, on the other hand, is how much space the object takes up, and density is how much mass is packed into that space (mass per volume).

Mass is the amount of matter in an object. It tells you how much stuff there is and stays the same no matter where you take the object. Gravity affects weight, not mass, so an object’s weight changes with location (for example, on the Moon it weighs less), but its mass stays constant.

We measure mass with a balance or a scale that compares the object to known masses, using units like grams or kilograms. Volume, on the other hand, is how much space the object takes up, and density is how much mass is packed into that space (mass per volume).

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