Question # 1

Sound is a form of.

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Energy

Wave

Frequency

intensity

Dolphins can hear sound underwater from up to ............ away

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15 km

20 km

25 km

30 km

------------ waves are produced in stretched string.

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Longitudinal wave

Elecromagnetic wave

Transverse wave

None of these

Sound cannot pass through.

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Solid

Liquid

Vacuum

Gasses

Which of the following animals can respond to highest frquency.

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Bat

Cat

Frog

Dolphin

Speed of sound in water is

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1000 ms-1

1500 ms-1

900 ms-1

2000 ms-1

Which of the followig features of a wave is the number of waves that pass by each second.

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Loudness

Amplitude

Frequncy

Wave speed

Sound waves are not.

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Compressional waves

Transverse waves

Mechnical waves

Low frequency waves

Wave are of .............. types.

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Two

Three

Four

Five

The lowest pointof a wave is................

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Crest

Amplitude

Peak

Trough

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Science 7th Class Urdu Medium Chapter 9 Online Test MCQs With Answers

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