Educational worksheet on mass and weight concepts with a visual comparison of an astronaut on Earth and the Moon.

Let's solve the worksheet step by step using the word bank provided:

Word Bank:
weight, matter, newton, more, weightlessness, kilograms, gravitational, gravity, same, space

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1. Mass is the amount of ________ contained in an object.

✔ Answer: matter
Explanation: Mass refers to the amount of matter in an object. It does not change with location.

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2. Mass is measured in ________.

✔ Answer: kilograms
Explanation: The standard unit of mass in the metric system is kilograms (kg).

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3. On the Earth mass of an object is the ________ as its weight.

✔ Answer: same
⚠️ Wait! This is a common misconception. Let’s clarify.
Actually, mass and weight are NOT the same, even on Earth.
- Mass is constant.
- Weight is the force due to gravity (W = mg), so it depends on gravity.

But the sentence says "mass is the same as its weight" — this is incorrect unless we're talking about numerical values under Earth’s gravity (e.g., 10 kg mass ≈ 98 N weight). But strictly speaking, they are different physical quantities.

However, since this is a fill-in-the-blank exercise, and the intended answer may be based on simplified teaching, some curricula say "mass and weight are the same on Earth" meaning their numerical values are proportional.

But looking at the context and the word bank, the correct word here should be same if the intention is that the value of mass and weight are numerically similar in everyday use (though technically wrong). But let’s check other clues.

Alternatively, perhaps it's a trick. Wait — actually, the correct scientific answer is that mass and weight are not the same. But given the options, and the fact that "same" is in the word bank, and many school-level materials say “mass and weight are the same” informally, we might accept same here.

But let’s look at Question 4 for clarity.

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4. Weight is defined as the amount of ________ force acting on an object.

✔ Answer: gravitational
Explanation: Weight is the force of gravity pulling on an object. So, it's the gravitational force.

So, now we know:
Weight = gravitational force → gravitational fits perfectly.

Thus, back to Q3:
Mass is not the same as weight. But the sentence says "mass of an object is the ________ as its weight." That would be false. So maybe the intended meaning is numerically equal? But that's only true if you ignore units.

But wait — perhaps there's a typo or misunderstanding.

Let’s reconsider:
On Earth, mass and weight are not the same, but sometimes people confuse them.

But looking at the picture at the bottom:
- On Earth: Mass = 100 kg, Weight = 980 N
- On Moon: Mass = 100 kg, Weight = 162.2 N

So mass stays same, weight changes.

Therefore, Q3 is misleading — mass and weight are not the same.

But since "same" is in the word bank, and the question says "is the ________ as", maybe it's meant to say that mass remains the same regardless of location, while weight changes.

Wait — re-read:
> "On the Earth mass of an object is the ________ as its weight."

That still doesn't make sense scientifically.

Unless it's poorly worded and meant to say:
"Mass is the same as it was before" — but no, it compares mass and weight.

Given the confusion, and the fact that "same" is likely intended to go here because otherwise no other word fits, and the question may be testing the idea that mass and weight are often confused, we’ll go with:

✔ Answer: same (with caveat: this is scientifically incorrect, but may be accepted in basic education)

But let’s keep going.

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5. Weight changes because of ________.

✔ Answer: gravity
Explanation: Weight depends on gravitational pull. If gravity changes (e.g., on Moon vs Earth), weight changes.

Also, gravitational is already used in Q4, so "gravity" is available.

So: gravity

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6. There is no force of gravity in ________.

✔ Answer: space
Explanation: In deep space, far from any large body, gravity is negligible. But note: gravity exists everywhere, but in orbit or deep space, it's very weak.

But commonly, people say "no gravity in space", though technically inaccurate. For educational purposes, space is the expected answer.

So: space

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7. Astronauts float in the space or in their spacecraft due to ________.

✔ Answer: weightlessness
Explanation: They experience weightlessness due to free fall (orbital motion), not because there's no gravity.

So: weightlessness

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8. Weight is measured in ________.

✔ Answer: newton
Explanation: Weight is a force, so measured in newtons (N).

So: newton

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9. If an object goes into the space its ________ changes.

✔ Answer: weight
Explanation: Mass stays the same, but weight decreases in space due to weaker gravity.

So: weight

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10. An object weighs ______ at sea level than at the top of a mountain.

✔ Answer: more
Explanation: Gravity is slightly stronger at sea level (closer to Earth’s center) than on a mountain. So weight is more at sea level.

So: more

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Now let’s compile all answers:

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✔ Final Answers:

1. matter
2. kilograms
3. same *(Note: Scientifically incorrect; mass ≠ weight, but may be accepted in context)*
4. gravitational
5. gravity
6. space
7. weightlessness
8. newton
9. weight
10. more

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🔍 Clarification on Question 3:

This is a common point of confusion.
- Mass is the amount of matter (in kg).
- Weight is the force of gravity (in N).
They are not the same, even on Earth.
For example:
- A 10 kg object has a weight of ~98 N on Earth.

So, saying "mass is the same as weight" is wrong.

But since "same" is the only word that makes grammatical sense in the sentence ("is the ________ as"), and no better option is available, it may be what the teacher expects — even though it's conceptually flawed.

Better phrasing would be:
"Mass is constant, while weight varies."

But given the constraints, we go with same.

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✔ Final Answer Key:

| Q# | Answer |
|----|--------------|
| 1 | matter |
| 2 | kilograms |
| 3 | same |
| 4 | gravitational|
| 5 | gravity |
| 6 | space |
| 7 | weightlessness |
| 8 | newton |
| 9 | weight |
| 10 | more |

Let me know if you'd like a corrected version of the worksheet!