Chapter 23: Sound Waves - Science Mcqs for Grade 7


Q.  The depth of the sea or ocean is calculated by a

a. machine
b. microchip
c. special fish
d. special detector


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  The louder the sound is, the more the amplitude it
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MCQs:  The full name of ultrasound is
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MCQs:  The melting of a metal with the help of ultrasounds is known as
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MCQs:  The louder the sound, the more
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MCQs:  Unwanted or unpleasant sounds are known as
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MCQs:  Some whales produce songs that travel for about
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MCQs:  In air, the speed of sound is
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MCQs:  Bats use ultrasound to find its
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MCQs:  The medical use of ultrasound is to detect
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MCQs:  The exact speed of sound depends upon
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MCQs:  The wave with compressions and rarefactions is known as
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MCQs:  Ships use echolocation to measure the
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MCQs:  An example of 'percussion' is
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MCQs:  An animal that can hear sounds with low frequency than human ear is
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MCQs:  In air, change in pressure produces
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MCQs:  Processes that do not require energy for the movement of particles are
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MCQs:  The percentage of transpiration by stomata is
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MCQs:  The contents that a plant uses to make food, are
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MCQs:  The rate of transpiration slows down when plant
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MCQs:  The process in which food substances are moved to rest of the plant by 'phloem' is known as
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