What is sound?

ScienceBoston International School

Biblical Principle

Being sensitive to God’s voice.

Revelation 14:2 King James Bible

And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and I heard the voice of harpers harping with their harps.

LEARNING OBJECTIVEIdentify how sound travels and its characteristics according to its vibration and intensity.

SOUND

Sounds waves are made of vibrations, sound waves can travel through gases, solid, and liquids. When sound waves reach your ear, your eardrum vibrates, enabling you to hear the sound.

Vocabulary

•Vibration: A series of back and forth movements.

•Loudness: The amount of energy a sound has.

•Pitch: The highness or lowness of a sound.

Activity in class

Read the book on pages 584 - 586. Then answer the questions.

1.What does pitch describe about a sound?

2.Could you hear under water?

3.How does a harp make sound?

4.If sound goes through the air by causing the air to

vibrate, how do you think it goes through a solid or

liquid?

HOMEWORK:

• Give examples of sounds with high and low pitch.• Bring materials for the project.

Materials:

•Empty paper towel roll•Dried rice and beans•Stapler•Gravel•Masking tape

Hands on work: Making a phone

Students will make a “phone” using two empty glasses and a long string

Activity in class

Draw a picture of the activity and write the conclusions about how solid can vibrate and transmit sound.

PROJECT :

Students will make their own maraca.

…After the Lab