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Question (1)

QN004195

During summer, tap water may feel hotter than water stored in a matka because

(A) matka water has a lower temperature
(B) tap water is always boiling
(C) matka adds ice to water
(D) tap water contains more minerals

Correct Answer: A

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Question (2)

QN004196

Which sense organ is mainly used when we try to judge whether an object is hot or cold?

(A) Eyes
(B) Nose
(C) Skin
(D) Ears

Correct Answer: C

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Question (3)

QN004197

The activity with containers A, B, and C was performed to show that

(A) warm water changes colour
(B) water has no temperature
(C) touch is not always reliable for judging hotness or coldness
(D) ice water is unsafe

Correct Answer: C

Explanation:

Our sense of touch can sometimes give misleading information about temperature.

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Question (4)

QN004198

In Activity 7.1, container A contains

(A) tap water
(B) warm water
(C) ice-cold water
(D) salt water

Correct Answer: B

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Question (5)

QN004199

In Activity 7.1, container B contains

(A) warm water
(B) ice-cold water
(C) tap water
(D) hot oil

Correct Answer: C

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Question (6)

QN004200

In Activity 7.1, container C contains

(A) warm water
(B) tap water
(C) ice-cold water
(D) boiling water

Correct Answer: C

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Question (7)

QN004201

A student keeps the right hand in warm water and the left hand in ice-cold water for 2 minutes. Both hands are then placed in tap water. The right hand is most likely to feel the tap water as

(A) hot
(B) cool
(C) freezing
(D) boiling

Correct Answer: B

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Question (8)

QN004202

In the same activity, the left hand is most likely to feel the tap water as

(A) warm
(B) icy
(C) boiling
(D) very cold

Correct Answer: A

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Question (9)

QN004203

The water in container B is actually

(A) both hot and cold
(B) neither hot nor cold
(C) at one temperature but felt differently by different hands
(D) changing temperature continuously

Correct Answer: C

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Question (10)

QN004204

The different feelings experienced by the two hands indicate that

(A) water temperature changes instantly
(B) our sense of touch can be misleading
(C) warm water cools faster
(D) ice water becomes warm immediately

Correct Answer: B

Explanation:

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Question (1)

During summer, tap water may feel hotter than water stored in a matka because

Explanation:

Link:

Question (2)

Which sense organ is mainly used when we try to judge whether an object is hot or cold?

Explanation:

Link:

Question (3)

The activity with containers A, B, and C was performed to show that

Explanation:

Link:

Question (4)

In Activity 7.1, container A contains

Explanation:

Link:

Question (5)

In Activity 7.1, container B contains

Explanation:

Link:

Question (6)

In Activity 7.1, container C contains

Explanation:

Link:

Question (7)

A student keeps the right hand in warm water and the left hand in ice-cold water for 2 minutes. Both hands are then placed in tap water. The right hand is most likely to feel the tap water as

Explanation:

Link:

Question (8)

In the same activity, the left hand is most likely to feel the tap water as

Explanation:

Link:

Question (9)

The water in container B is actually

Explanation:

Link:

Question (10)

The different feelings experienced by the two hands indicate that

Explanation:

Link:

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