Science Review #2 Unit 8, lesson 2

It means moving backward and forward very quickly.

• Sound

• Vibrating

• Pitch

An example of a vibration that is easy to see is:

• the strings on a guitar

• a whistle when is blown

• when we dance

An example of a vibration we cannot see is:

• a trumpet when is blown

• a bee flapping their wings quickly

• the strings on a guitar

Choose the correct statement according to how the sound travel through the air.

• One particle carries sound energy from a sound energy from a sound source to our ear.

• Sound energy is passed from one particple to another to our ears.

• Sound energy moves in straight lines.

Choose the correct statement according to how the sound travel through the air.

• Sound energy moves in straight lines.

• Sound energy travels in waves.

• Sound can travel without particles.

Choose the correct statement according to how the sound travel through the air.

• Sound energy moves in straight lines.

• Sound can travel without particles.

• Sound can travel through water.

The vibrations enter our ear through the ___________.

• outer ear

• ear drum

• auditory nerve

When the vibrations reach the ___________, they become louder.

• auditory nerve

• outer ear

• ear drum

It sends a message to the brain.

• outer ear

• auditory nerve

• ear drum

In a metal triangle, what vibrates to make the sound?

• The metal sticks and the triangle.

• The metal sticks

• The metal triangle