What is echolocation? 

Choose 1 answer

When sounds echo off hard surfaces

Timing how long it takes for a sound to reach an animal

Using the time taken for a reflection of sound to reach the sound emitter to locate objects

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From the highest frequency to the lowest, order the following sound ranges. 

Sort the options into the correct order.

Infrasound

Ultrasound

Human hearing range

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Imagine you are recording yourself playing the violin. What room would provide you with the best sound quality? 

Choose 1 answer

The kitchen, because it is large, has a tile floor and lots of hard surfaces

The garage, because it has thin walls and lots of stuff in it

The living room, because the floor is carpeted, there are lots of soft furnishings, and curtains on the walls

The corridor, because it is carpeted and is long and narrow

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Why is sonar a useful technology? 

Choose 2 answers

It helps us locate things which are too far away to see

It takes energy to emit and detect

It can't be heard by people

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Answer incorrect

Look at the slide below to work out the answer.