Sound

Sound

Multiple Choice

Which particle model will sound travel fastest through?

Multiple Select

Select the transverse waves

Open Ended

Sound cannot travel in space. Think carefully about how sounds travels and explain why no sounds can be heard in space.

Multiple Select

Which diagrams represent longitudinal waves?

Amplitude: Volume

Multiple Choice

Which will have the loudest sound?

Multiple Choice

Which will be the quietest sound?

Multiple Choice

Which wave will have the highest pitch?

• Red

• Orange

• green

• Blue

• Purple

Multiple Choice

Which wave will have the lowest pitch?

• Red

• Orange

• Green

• Blue

• Purple

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Open Ended

Why do you think this is?

You must learnt this!!

• Distance = Speed x Time

• Speed = Distance / Time

• Time = Distance / Speed

UNITS ARE IMPORTANT

• Distance is measure in metres (m

• Time is measured in seconds (s)

• Speed is measured in metres per second (m/s)

• ALWAYS USE THESE UNITS UNLESS THE QUESTION TELLS YOU OTHERWISE

Multiple Choice

Which is faster?

• Light

• Sound

Speed, distance and time are also used here. Sonar is used to measure the depth of oceans.

• Think about the problem on the next slide

Solving the problem.

• the Speed of Ultrasound in water 1530 m/s

• The signal takes 14.4 seconds to leave the ship and for it to return to the ships receiver

• How deep is that ocean?

Solving the problem

The Ultrasound signal leaves the ship, hits the ocean floor and reflects back up to the ship.

That is the total distance the ultrasound wave travelled. But is it the distance from the ship to the bed of the Ocean?

Solving the problem.

• Distance = Speed x Time

• Distance = 1530 (m/s) x 14.4 (s)

• = 22,032 metres (m)

• BUT! This is the distance from the ship to the bed of the ocean and back up to the ship again.

• Distance = 22,032 / 2

• Distance = 11,016 m

Open Ended

Using what you have learnt, explain how yo think dog whistles can only be heard by dogs.