Let's solve the worksheet titled
"Weight — Not Alike!" by filling in the differences between
mass and
weight based on scientific definitions.
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🔹 1. Definition
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MASS:
*The amount of matter in an object.*
Mass is a measure of how much "stuff" is in an object. It does
not change with location.
-
WEIGHT:
*The force of gravity acting on an object.*
Weight depends on the gravitational pull, so it can vary depending on where you are (e.g., Earth vs. Moon).
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🔹 2. Units
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MASS:
*Kilograms (kg)* – The standard unit in the metric system.
Other units: grams (g), milligrams (mg).
-
WEIGHT:
*Newtons (N)* – The unit of force in the metric system.
In everyday language, people often use pounds (lb), but that’s actually a unit of weight too.
> 💡 Note: While we say “I weigh 70 kg,” technically that’s incorrect because kilograms are mass. The correct statement would be “My mass is 70 kg” or “My weight is about 686 N” (since weight = mass × gravity ≈ 70 kg × 9.8 m/s²).
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🔹 3. Effects of Gravity
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MASS:
*Does not depend on gravity.*
Your mass stays the same whether you're on Earth, the Moon, or in space.
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WEIGHT:
*Changes with gravity.*
If gravity increases, weight increases. If gravity decreases (like on the Moon), weight decreases — even though mass remains constant.
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✔ Final Answer Summary:
| Category | MASS | WEIGHT |
|----------------------|-------------------------------------------|--------------------------------------------|
|
Definition | Amount of matter in an object | Force of gravity pulling on an object |
|
Units | Kilograms (kg) | Newtons (N) |
|
Effects of Gravity | Unaffected (stays constant) | Changes with location and gravitational strength |
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This worksheet helps clarify a common misconception:
mass is constant, but
weight varies with gravity. That’s why astronauts are "weightless" in space (low gravity), but their mass is still the same!
Let me know if you'd like this turned into a printable version!
Parent Tip: Review the logic above to help your child master the concept of mass versus weight worksheet.
