Mass and weight quiz worksheet - Free Printable

Let's go through each question in the P6 Quiz C worksheet and solve them step by step with explanations.

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1. Choose: Device used in measuring weight………… (Common balance - spring scale - sensitive balance)

✔ Answer: Spring scale

🔹 Explanation:
- Weight is a force due to gravity, measured in newtons (N).
- A spring scale measures weight by using Hooke’s Law — the extension of a spring is proportional to the force applied.
- Common balance and sensitive balance measure mass, not weight (they compare masses using gravity).
- So, the correct device for measuring weight is the spring scale.

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2. Tick (true) or (false): Mass of an object on Earth differs from its mass on Moon. (True) – (False)

✔ Answer: False

🔹 Explanation:
- Mass is the amount of matter in an object and does not change with location.
- Whether on Earth or Moon, the mass stays the same.
- What changes is weight, because weight depends on gravity (which is weaker on the Moon).
- So, mass remains constant → Answer is False.

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3. Complete: The effect of gravity is always directed towards the ………… of the Earth.

✔ Answer: Center

🔹 Explanation:
Gravity pulls objects toward the center of the Earth. This is why we feel pulled downward — the direction of gravity is always toward the center of the planet.

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4. Give reason: Astronauts float in space.

✔ Answer:
Astronauts float in space because they are in a state of free fall around the Earth. Although gravity still acts on them, they are moving forward at such high speed that they continuously "fall" around the Earth, creating a sensation of weightlessness. This is often called microgravity.

🔹 Simplified explanation:
They are falling toward Earth, but their horizontal motion keeps them in orbit — so they appear to float.

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5. Solve: Find the weight of a piece of wood of mass = 60 gm.

✔ Answer:
We need to convert mass to kilograms and use the formula:

> Weight (W) = mass (m) × gravity (g)
> Where:
> - $ m = 60 \text{ gm} = 0.06 \text{ kg} $
> - $ g = 9.8 \, \text{m/s}^2 $ (approx. 10 m/s² for simplification in school level)

So,
$$
W = 0.06 \times 9.8 = 0.588 \, \text{N}
$$

Or if using $ g = 10 \, \text{m/s}^2 $:
$$
W = 0.06 \times 10 = 0.6 \, \text{N}
$$

✔ Answer: 0.588 N (or 0.6 N if approximated)

🔹 Note: Weight is in newtons (N), not grams.

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6. Match each word to its correct definition:

| Column A | Column B |
|---------|----------|
| 1- Mass | B- It is the amount of matter inside an object. |
| 2- Weight | A- It is the force by which Earth attracts objects towards its center. |

✔ Answer:
- Mass → B
- Weight → A

🔹 Explanation:
- Mass is how much matter is in an object (measured in kg/g).
- Weight is the gravitational force acting on that mass (measured in N).

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7. Drag and drop:

There are three images:

1. Digital scale (shows 203.1 g) → This is a Sensitive balance (modern digital one)
2. Traditional beam balance (two pans) → This is a Common balance (but not listed)
3. Spring scale (with hook and spring) → Clearly labeled as Spring Scale

But the options given are:
- Spring Scale
- Sensitive balance

So, match the images:

✔ Image 1 (Digital scale) → Sensitive balance
✔ Image 3 (Spring scale) → Spring Scale

🔹 Explanation:
- The digital scale is a modern sensitive balance used to measure mass accurately.
- The spring scale measures weight using a spring mechanism.

> Note: The beam balance is not matched here — it's likely meant to be ignored or paired differently, but since only two labels are provided, we assign based on matching names.

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✔ Final Answers Summary:

| Question | Answer |
|--------|--------|
| 1 | Spring scale |
| 2 | False |
| 3 | Center |
| 4 | Astronauts float because they are in free fall/orbit, experiencing microgravity. |
| 5 | 0.588 N (or 0.6 N) |
| 6 | Mass → B; Weight → A |
| 7 | Digital scale → Sensitive balance; Spring scale image → Spring Scale |

Let me know if you'd like this formatted into a printable answer sheet!