Year 4 –Science - Sound
Activity 1 - Vibrations - Page 2
Activity 2 –How do we hear? - Page 8
Activity 3 –Loud and quiet sounds - Page 15
Activity 4 - Pitch - Page 21
Activity 5 –Pitch Optional Challenge –Page 30
Activity 6 - Quiz - Page 33
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Activity 3 – Loud and quiet sounds - Page 15 ... We can see and feel vibrations whenever sounds are ... being very noisy and 0 being totally silent.
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Year 4 – Science - Sound
- Activity 1 - Vibrations - Page - Activity 2 – How do we hear? - Page - Activity 3 – Loud and quiet sounds - Page - Activity 4 - Pitch - Page
- Activity 5 – Pitch Optional Challenge – Page - Activity 6 - Quiz - Page
What is Sound?
Discuss with your family or think about what you already know using the questions below as prompts.
What is Sound?
Did you come up with some words to explain how the musical instruments make sounds? Look at the words below. Did you choose any of these words?
Vibrate Vibration Twang Blow
Bang Scrape Shake Pluck
Vibrations
All the instruments are played in different ways, but they all have something in common. They all create sounds by vibrating. But what is a vibration? The balafon and the bongos make sounds when they are hit or banged, causing the blocks or the skin to vibrate. The pan pipes and horn are filled with air, which vibrates when they are blown. The strings of the guitar and the gopichand vibrate when they are plucked.
Sound Survey
Around your home or on your daily walk there are lots of different sounds. Some places will be noisy, whereas some places will be quiet. The loudness of the different places will even change throughout the day! You are going to carry out a sound survey of your home or local area to find which places are noisy and which are quiet at different times of day. You may decide to rate each place out of 5, with 5 being very noisy and 0 being totally silent. (Science Tasks Document page 1)
What did you learn about in
activity 1?
Watch this video to find out
more
https://www.bbc.co.uk/teach/class-clips-
video/music--science-ks2-what-is-
sound/zbnmhbk
How sound is made?
Sound is caused by vibration. Vibration means wobbling very quickly back and forth. When you pluck a guitar string, or hit a drumskin, you can see the material vibrate. This causes the air touching the string to vibrate, which causes air further away to vibrate, which causes the air near your ear to vibrate, which your brain experiences as sound. The moving vibration is called a sound wave.
Activity 2
Using the information on the slides and the video, create an explanation text showing how we hear things. You could use the sheet (Science Tasks Document page 2 - 3) For an extra challenge, try drawing some of your own diagrams and writing some of your own descriptions.
Loud and quiet sounds
Watch this clip to see if you can identify how different sounds travel.
https://www.bbc.co.uk/bitesize/clips/z9h6n
Loud and Quiet
The louder the sound, the bigger the vibration. In the video, you should have noticed that the polystyrene balls vibrated more when she hit the drum harder, creating a louder sound. The size of the vibration is called the amplitude. Quieter sounds have a smaller amplitude, and louder sounds have a bigger amplitude.
Hearing Sounds
Once in your ear, the vibrations travel into the ear canal until they reach the eardrum. The eardrum passes the vibrations through the middle ear bones (the hammer, the anvil and the stirrup) into the inner ear. The inner ear is shaped like a snail and is called the cochlea. Inside the cochlea, there are thousands of tiny hair cells. Hair cells change the vibrations into electrical signals that are sent to the brain through the hearing nerve. The brain tells you that you are hearing a sound and what that sound is.
The Science of Sound Activity
Use the ideas you saw in the clip, or your own ideas to come up with your own way of explaining how different sounds travel for the programme. You could use The Science of Sound Activity Sheet (Science Tasks Document page 4) to plan your ideas and then practise what you will do and say. Make sure your explanations are clear and easy for children to understand. Have fun and get into character!