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Question (1)

QN0033862

A student makes two circular cardboard spinners of the same size. In Spinner P, the toothpick passes exactly through the centre. In Spinner Q, the toothpick is slightly away from the centre. Which spinner is more likely to spin smoothly for a longer time?

(A) Spinner Q only
(B) Both will spin exactly the same
(C) Spinner P only
(D) Neither spinner will spin

Correct Answer: C

Explanation:

A spinner with the hole at the centre remains balanced and spins more smoothly.

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Question (2)

QN0033863

A square spinner is painted with four different colours. When it spins very fast, what is the most likely observation?

(A) The square shape appears clearer.
(B) The colours seem to mix and the spinner appears circular.
(C) The colours disappear completely.
(D) The spinner becomes triangular.

Correct Answer: B

Explanation:

Fast spinning makes the square appear circular and the colours seem to merge because of rapid motion.

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Question (3)

QN0033864

Four students tested different objects. - Riya – Coin - Mohan – Bangle - Tara – Eraser - Kabir – Wooden top Whose object is least likely to spin properly?

(A) Riya
(B) Mohan
(C) Tara
(D) Kabir

Correct Answer: C

Explanation:

An eraser does not have a suitable shape for smooth spinning.

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Question (4)

QN0033865

Aman wants to improve a spinner that keeps falling while spinning. Which change is most likely to help?

(A) Move the toothpick closer to the centre.
(B) Tear one side of the spinner.
(C) Bend the cardboard randomly.
(D) Make the toothpick loose.

Correct Answer: A

Explanation:

A balanced spinner with the hole at the centre spins better.

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Question (5)

QN0033866

Three objects are dropped into water. - Empty steel bowl — Floats - Iron nail — Sinks - Empty plastic bottle with lid closed — Floats Which conclusion is correct?

(A) All heavy objects sink.
(B) Only light objects float.
(C) Floating depends on factors other than weight alone.
(D) Iron always sinks because it is black.

Correct Answer: C

Explanation:

Weight alone does not decide floating or sinking; shape and trapped air also matter.

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Question (6)

QN0033867

A tightly pressed aluminium foil ball sinks in water. Which change can make the same foil float?

(A) Cut it into tiny pieces.
(B) Heat it strongly.
(C) Shape it like a small cup.
(D) Paint it blue.

Correct Answer: C

Explanation:

Changing the shape increases its ability to float.

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Question (7)

QN0033868

Four groups made boats. - Group A – Flat and wide base - Group B – Very narrow base - Group C – Boat with a hole - Group D – Boat tilted to one side Which boat is expected to remain the most stable?

(A) Group A
(B) Group B
(C) Group C
(D) Group D

Correct Answer: A

Explanation:

A wide, balanced base gives better stability on water.

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Question (8)

QN0033869

Ravi spins a coin. It spins fast at first, then starts shaking before stopping. What is the correct sequence?

(A) Stops → Shakes → Spins fast
(B) Spins fast → Shakes → Stops
(C) Shakes → Spins fast → Stops
(D) Spins fast → Stops → Shakes

Correct Answer: B

Explanation:

As the coin slows down, it begins to shake before finally stopping.

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Question (9)

QN0033870

A teacher asks students to identify the best example that shows shape affects floating.

(A) Comparing a stone and a leaf
(B) Comparing an empty bottle and a full bottle
(C) Comparing aluminium foil spread flat and the same foil pressed into a ball
(D) Comparing a coin and a pencil

Correct Answer: C

Explanation:

The material remains the same; only the shape changes.

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Question (10)

QN0033871

Which activity best helps students understand how things work through observation and experimentation?

(A) Memorising definitions only
(B) Watching others without trying
(C) Making spinners, testing boats, and recording observations
(D) Reading the chapter once without performing activities

Correct Answer: C

Explanation:

The chapter encourages learning through hands-on activities, careful observation, and recording results.

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Question (1)

A student makes two circular cardboard spinners of the same size. In Spinner P, the toothpick passes exactly through the centre. In Spinner Q, the toothpick is slightly away from the centre. Which spinner is more likely to spin smoothly for a longer time?

Explanation:

Link:

Question (2)

A square spinner is painted with four different colours. When it spins very fast, what is the most likely observation?

Explanation:

Link:

Question (3)

Four students tested different objects. - Riya – Coin - Mohan – Bangle - Tara – Eraser - Kabir – Wooden top Whose object is least likely to spin properly?

Explanation:

Link:

Question (4)

Aman wants to improve a spinner that keeps falling while spinning. Which change is most likely to help?

Explanation:

Link:

Question (5)

Three objects are dropped into water. - Empty steel bowl — Floats - Iron nail — Sinks - Empty plastic bottle with lid closed — Floats Which conclusion is correct?

Explanation:

Link:

Question (6)

A tightly pressed aluminium foil ball sinks in water. Which change can make the same foil float?

Explanation:

Link:

Question (7)

Four groups made boats. - Group A – Flat and wide base - Group B – Very narrow base - Group C – Boat with a hole - Group D – Boat tilted to one side Which boat is expected to remain the most stable?

Explanation:

Link:

Question (8)

Ravi spins a coin. It spins fast at first, then starts shaking before stopping. What is the correct sequence?

Explanation:

Link:

Question (9)

A teacher asks students to identify the best example that shows shape affects floating.

Explanation:

Link:

Question (10)

Which activity best helps students understand how things work through observation and experimentation?

Explanation:

Link:

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