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Question (31)

QN004740

Which observation gives stronger evidence against the idea of water seeping through glass?

(A) Ice melts inside
(B) Water level remains unchanged after marking
(C) Tumbler becomes cold
(D) Steel plate becomes wet

Correct Answer: B

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Question (32)

QN004741

Humidity refers to

(A) amount of oxygen in air
(B) amount of carbon dioxide in air
(C) amount of water vapour in air
(D) amount of dust in air

Correct Answer: C

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Question (33)

QN004742

Which activity modification helped confirm that water was not leaking through the tumbler wall?

(A) Using a larger tumbler
(B) Adding more ice cubes
(C) Marking the water level
(D) Removing the steel plate

Correct Answer: C

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Question (34)

QN004743

The water droplets appearing outside a cold tumbler come mainly from

(A) inside water leaking out
(B) melted glass
(C) water vapour present in air
(D) dissolved gases

Correct Answer: C

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Question (35)

QN004744

If atmospheric humidity is very low, condensation on a cold tumbler is expected to be

(A) greater
(B) unchanged
(C) less
(D) impossible to predict

Correct Answer: C

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Question (36)

QN004745

Which everyday phenomenon is most similar to water droplets forming on a cold tumbler?

(A) Ice melting in a tray
(B) Dew forming on grass
(C) Water boiling in a kettle
(D) Salt dissolving in water

Correct Answer: B

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Question (37)

QN004746

An Atmospheric Water Generator (AWG) produces drinkable water mainly through

(A) freezing water
(B) filtering soil water
(C) condensation of water vapour from air
(D) melting icebergs

Correct Answer: C

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Question (38)

QN004747

Which scientific process used in AWG machines is similar to the formation of droplets outside a cold glass?

(A) Sublimation
(B) Condensation
(C) Freezing
(D) Melting

Correct Answer: B

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Question (39)

QN004748

Why cannot Activity 8.4 alone conclusively prove that no water seeped through the tumbler?

(A) Mass can increase due to condensation even if leakage occurs
(B) Balance readings are always incorrect
(C) Ice cubes never melt completely
(D) Water vapour cannot condense on glass

Correct Answer: A

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Question (40)

QN004749

A student observes that the mass of a cold tumbler setup increases while the water level inside remains unchanged. The best conclusion is

(A) water leaked out and returned
(B) extra water came from condensation of atmospheric water vapour
(C) glass produced water
(D) ice created new matter

Correct Answer: B

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Question (31)

Which observation gives stronger evidence against the idea of water seeping through glass?

Explanation:

Link:

Question (32)

Humidity refers to

Explanation:

Link:

Question (33)

Which activity modification helped confirm that water was not leaking through the tumbler wall?

Explanation:

Link:

Question (34)

The water droplets appearing outside a cold tumbler come mainly from

Explanation:

Link:

Question (35)

If atmospheric humidity is very low, condensation on a cold tumbler is expected to be

Explanation:

Link:

Question (36)

Which everyday phenomenon is most similar to water droplets forming on a cold tumbler?

Explanation:

Link:

Question (37)

An Atmospheric Water Generator (AWG) produces drinkable water mainly through

Explanation:

Link:

Question (38)

Which scientific process used in AWG machines is similar to the formation of droplets outside a cold glass?

Explanation:

Link:

Question (39)

Why cannot Activity 8.4 alone conclusively prove that no water seeped through the tumbler?

Explanation:

Link:

Question (40)

A student observes that the mass of a cold tumbler setup increases while the water level inside remains unchanged. The best conclusion is

Explanation:

Link:

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