Imagine a world without sound. No laughter, no music,

no birds chirping in the morning, and no voices of loved

ones. Sound is not just a means of communication, but

a way to connect with the world around us. From the

gentle rustle of leaves to the thunderous roar of a waterfall,

sound has the power to evoke emotions and capture our

imagination.

In this unit, we will explore the fascinating world of sound, from how it is produced to how it travels through different mediums, and how we perceive it with our ears. So, get ready to tune in and discover the wonders of sound!

Discuss these questions with your partners:

Let's solve these activities to learn more:

1) Watch the TEDed video about The science of hearing and write 4 things you learnt from it:

2. Choose 3 of these activities and solve them in your notebook:

Watch the video about how the human body produces voice,

and answer: why is producing our voice such a complex

process? what body parts participate?

What are the types of instruments that exist?

mention 5 examples per type.

Recommended website: study.com/sounds

Use a search engine to investigate how ultrasound devices have helped in the medicine and technology industries.

What is sound pollution? write 3 examples. Recommended website: Natgeo

Do some research about the way in which animals communicate, do all animals produce sounds?

Investigate how noise-canceling headphones work,

and what other technologies are being developed to

improve our listening experience.

We already know some facts about sounds. Now, imagine a world where you can see music, feel it in your bones, and ride the waves of sound like a surfer catching the perfect wave. That's right, we're about to dive deep into the exciting world of sound waves! Just like how waves in the ocean move up and down, sound waves travel through the air, bouncing off objects and reaching our ears to create the music we love and the sounds we hear every day. So, put on your wetsuits and grab your surfboards, because we're about to ride the waves of sound!

Today's objective is to recognize why sound is a wave and the basic properties of waves.

1) Watch this video about sound and answer:

a) An unpleasant sound is called a:

b) A sound made by an instrument is called a:

c) Many sounds from instruments together are called:

d) When something vibrates it ....

e) Why is sound compared to dominoes?

2) Draw the wave and its parts:

3) After the explanation of sound as a wave from BYJUS (and drawing the parts of a wave), we will watch a very complete video about sound and its characteristics. Explain the three characteristics of sound: loudness, pitch, and timbre. Draw examples of each characteristic: