sound g2

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Ch. 10 , Lesson 6( Sound )

What is Sound?

• One kind of energy that let us hear.

• Sound is made when something vibrates.

• Moves back and forth.

Vocabulary:SoundVibratesPitch

Objectives:I will be able to know:1-how sounds are made.2-identify how sounds move, or vibrate through the air.

Sound

vibrates

3


• When something vibrates it makes the air around it vibrate, too.

• Vibrating air moves to your ear.

• It makes part of your ear vibrate.

• This is how you hear.



4


• When you speak, air from your lungs make your vocal cords vibrate.

• Touch your throat as you speak, you will feel vibration.



5


• Sound travels in waves.

• Sound waves move through the air like ripples in a pond.



6


What makes loud and soft sounds? Not all sounds are the same.some are loud and some are soft. big vibrations make loud sounds

small vibrations make soft sounds.

The farther away you are from the sound the softer it sounds to you.



9


What is Pitch?

• How high or low a sound is.• Musical instruments work by

vibrating.• When you hit a small bar

the vibrations are fast the pitch is higher.

• When you hit a big bar the vibrations are slow the pitch is low.


Objectives:I will be able to know:1-how sounds are made.2-identify how sounds move, or vibrate through the air.3-understand loudness and pitch.

pitch

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• The big dog’s bark has a low pitch.

• The small dog’s bark has a high pitch.


Objectives:I will be able to know:1-how sounds are made.2-identify how sounds move, or vibrate through the air.3-understand loudness and pitc

11


What can sound movethrough?Sound can move through gases, liquids, and solids.Most sounds you hear is moving through air, Air is made of gases.



12


You can hear sounds underwater.The sounds make the water vibrate.Vocabulary:

SoundVibratesPitch


13


If you put your ear to a desk or a door, you will hear a sound from the other side.The sounds make the wood vibrate, so sound travel through solids.



14

Sound

Something vibrates pitch moves through things

Moves back and forth low high air water wood

sound g2

Science