Here are the answers to your quiz questions.
1- Choose:
The device used for measuring weight is the
spring scale.
*(Note: Balances are used to measure mass, while a spring scale measures the force of gravity, which is weight.)*
2- Tick (true) or (false):
False
*(Reason: Mass is the amount of matter in an object and stays the same everywhere. Weight changes depending on gravity, but mass does not.)*
3- Complete:
The effect of gravity is always directed towards the
center of the earth.
4- Give reason:
Astronauts float in space because they are in a state of
free fall around the Earth. Even though there is still gravity pulling on them, they are moving sideways so fast that they keep missing the ground, creating a feeling of weightlessness.
5- Solve:
To find the weight, we multiply the mass by the acceleration due to gravity ($g \approx 9.8 \, \text{m/s}^2$).
* First, convert grams to kilograms: $60 \, \text{gm} = 0.06 \, \text{kg}$.
* Formula: $\text{Weight} = \text{Mass} \times \text{Gravity}$
* Calculation: $0.06 \times 9.8 = 0.588$
The weight is
0.588 Newtons.
6- Match each word to its correct definition:
*
1- Mass matches with
B (it is the amount of matter inside an object).
*
2- Weight matches with
A (it is the force by which earth attracts the objects towards its Center).
7- Drag and drop:
* The image of the digital scale (top left) corresponds to
Sensitive balance.
* The image of the hanging device with a hook (top right) corresponds to
Spring Scale.
*(Note: The traditional two-pan balance in the middle is typically called a Common Balance or Beam Balance).*
──────────────────────────────────────
Final Answer:
1. Spring scale
2. False
3. Center
4. Because they are in free fall (orbiting) around the Earth.
5. 0.588 N
6. 1-B, 2-A
7. Digital image -> Sensitive balance; Hanging hook image -> Spring Scale
Parent Tip: Review the logic above to help your child master the concept of mass and weight worksheet.
