Let's go through each of the questions in your quiz and solve them one by one, with explanations.
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1. A push or pull that acts on an object is called
Options:
A) Energy
B) Force
✔
C) Work
D) Momentum
Explanation:
A
force is any interaction that causes an object to accelerate or change its state of motion. A push or pull is a classic definition of force.
✔ Correct Answer: B) Force
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2. When we throw a ball up, it falls down to the ground because of force of
Options:
A) Magnetic
B) Friction
C) Electric
D) Gravity
✔
Explanation:
The Earth pulls objects toward itself due to
gravity, which is why the ball comes back down after being thrown upward.
✔ Correct Answer: D) Gravity
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3. Friction occurs when the object rubs against a
Options:
A) Surface
✔
B) Air
C) Water
D) Vacuum
Explanation:
Friction is the resistance that one surface or object encounters when moving over another. It happens when two surfaces are in contact and rubbing against each other. So, friction occurs when an object rubs against a
surface.
✔ Correct Answer: A) Surface
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4. When we use force to move things, we do?
Options:
A) Work
✔
B) Energy
Explanation:
In physics,
work is done when a force causes an object to move. The formula for work is:
Work = Force × Distance
So, applying force to move something means you are doing
work.
✔ Correct Answer: A) Work
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5. Burning of fuels to produce energy causes pollution. Should we use them?
Options:
A) None of the above
B) Yes
C) No
✔
D) Can use
Explanation:
While fossil fuels are currently widely used, they release harmful pollutants (like CO₂ and smoke) into the atmosphere, causing environmental damage and climate change. Therefore, from an environmental perspective, we should
avoid using them as much as possible and switch to cleaner energy sources.
✔ Correct Answer: C) No *(Note: This depends on context, but in science education, the emphasis is usually on reducing pollution.)*
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6. We can calculate the work done by using the formula
*(Image shows a person pushing a gate; text says "We can calculate the work done by using the formula")*
Options not shown, but likely:
A) Force × Time
B) Mass × Acceleration
C) Force × Distance
✔
D) Power × Time
Explanation:
The standard formula for
work is:
👉
Work = Force × Distance
This is only valid when the force is applied in the direction of motion.
✔ Correct Answer: C) Force × Distance
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Summary of Answers:
| Q# | Answer |
|----|--------|
| 1 | B) Force |
| 2 | D) Gravity |
| 3 | A) Surface |
| 4 | A) Work |
| 5 | C) No |
| 6 | C) Force × Distance |
Let me know if you want help with the remaining questions (7–10)!
Parent Tip: Review the logic above to help your child master the concept of energy worksheet for 4th grade.
