Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed.

What leads to this observation?

were heated

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were pressurized

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were left alone

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were cooled

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Solution

The correct option is A
were heated

Heating causes the particles of the medium to vibrate vigorously and they spread out, thereby causing an increase in the volume.

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Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed. What leads to this observation?

The correct option is A were heated Heating causes the particles of the medium to vibrate vigorously and they spread out, thereby causing an increase in the volume.

Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed.

What leads to this observation?

The correct option is A
were heated

Heating causes the particles of the medium to vibrate vigorously and they spread out, thereby causing an increase in the volume.