SOUND AND HEARING www.sciencetutors.zoomshare.com

SOUND AND HEARING In unit 8L Sound and Hearing you are expected to: build on your knowledge of sound and hearing explain how sound travels through media (solid, liquid and gas) give an explanation of how the human ear works, find out about the harmful effects of loud noise and how loud noise can be reduced

In unit 8L Sound and Hearing you are expected to:

build on your knowledge of sound and hearing

explain how sound travels through media (solid, liquid and gas)

give an explanation of how the human ear works,

find out about the harmful effects of loud noise and how loud noise can be reduced

Quick Quiz (8 minutes) How are sounds made or produced? How are sounds transported OR How does sound travel through solids, liquids and gases? www.sciencetutors.zoomshare.com

How are sounds made or produced?

How are sounds transported

OR

How does sound travel through solids, liquids and gases?

What have these 2 objects got in common? www.sciencetutors.zoomshare.com

This is how sound is produced: Identify which part(s) vibrates to make the sound.

Ask pupils how sound is produced. Show pupils examples where the vibration is easily seen, eg tuning fork and polystyrene ball, loudspeaker and grains of sand. Tuning Fork is used in the study of sound in Physics and is a system for the visualization, analysis www.sciencetutors.zoomshare.com

Ask pupils how sound is produced. Show pupils examples where the vibration is easily seen, eg tuning fork and polystyrene ball, loudspeaker and grains of sand.

Identifying and Describing Sound Teacher to play an audio tape of different sounds, and ask students to identify and or describe the sounds using keywords like- 'high pitch' and or 'low pitch' to describe pitch, And 'loud' and 'soft' to describe intensity.

Teacher to play an audio tape of different sounds, and ask students to identify and or describe the sounds using keywords like-

'high pitch' and or 'low pitch' to describe pitch,

And 'loud' and 'soft' to describe intensity.

Quick Discussion Session 1 Sound can travel through a vacuum True or False And Why? www.sciencetutors.zoomshare.com

Sound can travel through a vacuum

True or False

And Why?

Quick Discussion Session 2 The vibrations that make sound are transferred through a medium True or False And Why? www.sciencetutors.zoomshare.com

The vibrations that make sound are transferred through a medium

Quick Discussion Session 3 Draw the particle arrangement in Solid, liquids and gases. Describe how sounds travel through solids, liquids and gases using above diagrams, Use the particle theory to explain why sound needs a medium to travel. www.sciencetutors.zoomshare.com

Draw the particle arrangement in Solid, liquids and gases.

Describe how sounds travel through solids, liquids and gases using above diagrams,

Use the particle theory to explain why sound needs a medium to travel.

Investigating Sound in Vacuum Your task is to write down a prediction of what will happen when the bell jar contains: a) Air b) No Air (VACUUM) . www.sciencetutors.zoomshare.com

Your task is to write down a prediction of what will happen when the bell jar contains:

a) Air

b) No Air (VACUUM) .

Checking Progress 1 Sound travels at different speeds in different types of material. TRUE or FALSE? Explain your choice of answer. www.sciencetutors.zoomshare.com

Sound travels at different speeds in different types of material.

TRUE or FALSE?

Explain your choice of answer.

Compare the speed of sound in the following www.sciencetutors.zoomshare.com

Sound waves dissipate less energy when travelling through liquids and solids, compared with air. This allows them to travel more quickly and to retain intensity. To see animations of sound in water Visit: http://www.fishfinderdiscounts.com/files/1694667/uploaded/fishfindersonar.gif www.sciencetutors.zoomshare.com

Sound waves dissipate less energy when travelling through liquids and solids, compared with air. This allows them to travel more quickly and to retain intensity.

Your first task is to produce a list of key questions related to the work that has been covered in the last three lessons of SOUNDS AND HEARING Your second task is to pick out all challenging questions and discuss answers to them using appropriate terminology or concepts with evidence and reasons in your answers .

Your first task is to produce a list of key questions related to the work that has been covered in the last three lessons of

SOUNDS AND HEARING

Your second task is to pick out all challenging questions and discuss answers to them using appropriate terminology or concepts with evidence and reasons in your answers .

Review Work on Sound And Hearing Review work on sound and hearing by helping pupils construct a concept map which makes connections between different ideas within this unit using terms like: Pitch, Loudness, Amplitude, Decibel, Hearing, Vibration, Sound insulation. Discuss outcomes with pupils.

Review work on sound and hearing by helping pupils construct a concept map which makes connections between different ideas within this unit using terms like:

Pitch, Loudness, Amplitude, Decibel, Hearing, Vibration, Sound insulation.

Discuss outcomes with pupils.