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Question (11)

QN0011283

If one rubber band vibrates 10 times and another vibrates 20 times in the same period, which is likely to produce a different sound?

(A) Only the first
(B) Only the second
(C) is correct because different vibrations can produce different sounds.
(D) Neither

Correct Answer: C

Explanation:

Option (c) is correct because different vibrations can produce different sounds.

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Question (12)

QN0011284

Two cups contain equal amounts of water. One is kept in sunlight and the other in shade for 20 minutes. Which statement is correct?

(A) Both remain equally warm
(B) The shaded cup becomes warmer
(C) is correct because sunlight provides heat energy.
(D) Both freeze

Correct Answer: C

Explanation:

Option (c) is correct because sunlight provides heat energy.

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Question (13)

QN0011285

The Sun warming water in a cup demonstrates

(A) sound energy
(B) is correct because sunlight heats the water.
(C) fuel energy
(D) movement energy only

Correct Answer: B

Explanation:

Option (b) is correct because sunlight heats the water.

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Question (14)

QN0011286

If Cup A is kept in sunlight for 15 minutes and Cup B for 30 minutes, which is likely to be warmer?

(A) Cup A
(B) is correct because longer exposure to sunlight generally increases warming.
(C) Both same
(D) Neither

Correct Answer: B

Explanation:

Option (b) is correct because longer exposure to sunlight generally increases warming.

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Question (15)

QN0011287

What is the main source of energy for humans?

(A) Water
(B) is correct because food provides energy to the body.
(C) Soil
(D) Air

Correct Answer: B

Explanation:

Option (b) is correct because food provides energy to the body.

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Question (16)

QN0011288

A child skips breakfast and feels tired during games. The most likely reason is

(A) is correct because food gives the body energy to work and play.
(B) too much sunlight
(C) excess sound energy
(D) strong wind

Correct Answer: A

Explanation:

Option (a) is correct because food gives the body energy to work and play.

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Question (17)

QN0011289

Animals obtain energy mainly from

(A) rocks
(B) is correct because food is a source of energy for living things.
(C) clouds
(D) sand

Correct Answer: B

Explanation:

Option (b) is correct because food is a source of energy for living things.

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Question (18)

QN0011290

A bird flies 5 km searching for food. The energy used for flying ultimately comes from

(A) is correct because animals get energy from food.
(B) plastic
(C) metal
(D) paper

Correct Answer: A

Explanation:

Option (a) is correct because animals get energy from food.

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Question (19)

QN0011291

Vehicles such as cars and scooters mainly get energy from

(A) food
(B) is correct because fuels provide energy for vehicles to run.
(C) cloth
(D) wood only

Correct Answer: B

Explanation:

Option (b) is correct because fuels provide energy for vehicles to run.

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Question (20)

QN0011292

Petrol and diesel are examples of

(A) foods
(B) is correct because petrol and diesel are fuels used in vehicles.
(C) metals
(D) fibres

Correct Answer: B

Explanation:

Option (b) is correct because petrol and diesel are fuels used in vehicles.

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Question (11)

If one rubber band vibrates 10 times and another vibrates 20 times in the same period, which is likely to produce a different sound?

Explanation:

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Question (12)

Two cups contain equal amounts of water. One is kept in sunlight and the other in shade for 20 minutes. Which statement is correct?

Explanation:

Link:

Question (13)

The Sun warming water in a cup demonstrates

Explanation:

Link:

Question (14)

If Cup A is kept in sunlight for 15 minutes and Cup B for 30 minutes, which is likely to be warmer?

Explanation:

Link:

Question (15)

What is the main source of energy for humans?

Explanation:

Link:

Question (16)

A child skips breakfast and feels tired during games. The most likely reason is

Explanation:

Link:

Question (17)

Animals obtain energy mainly from

Explanation:

Link:

Question (18)

A bird flies 5 km searching for food. The energy used for flying ultimately comes from

Explanation:

Link:

Question (19)

Vehicles such as cars and scooters mainly get energy from

Explanation:

Link:

Question (20)

Petrol and diesel are examples of

Explanation:

Link:

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