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Let's teach! Primary

Lesson 1

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Science Year 1 Unit 4 Lesson 5 Intro 1

Lesson 5

How do scientists use what they know about sound?

Science Year 1 Unit 4 Lesson 5 Intro 2

Lesson 5

How do scientists use what they know about sound?

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Science Year 1 Unit 4 Lesson 5 Slide 1

Scientists have worked out how the ear works.

Science Year 1 Unit 4 Lesson 5 Slide 2

[1] Soundwaves enter the ear canal.

Science Year 1 Unit 4 Lesson 5 Slide 3

[2] They travel to the eardrum and make it vibrate.

Science Year 1 Unit 4 Lesson 5 Slide 4

[3] The vibrations make three small bones behind the eardrum vibrate too.

Science Year 1 Unit 4 Lesson 5 Slide 5

[4] The vibrations travel into the inner ear to a part called the cochlea.

Fluid in the cochlea moves. The fluid makes tiny hairs move. The hairs change the movement into signals or messages.

Science Year 1 Unit 4 Lesson 5 Slide 6

[5] The hearing nerve takes the messages to the brain. The brain works out what the sound is.

Science Year 1 Unit 4 Lesson 5 Slide 7

Some people cannot hear well.

Scientists have invented hearing aids to help them.

Science Year 1 Unit 4 Lesson 5 Slide 8

Hearing aids are simple machines.

Most work using batteries.

They pick up sound and make it louder.

Science Year 1 Unit 4 Lesson 4 Slide 9

They send the loud sound into the ear.

The sounds are sent to the brain.

Science Year 1 Unit 4 Lesson 4 Slide 10

I wonder how scientists help people who cannot see?

Science Year 1 Unit 4 Lesson 5 Final Slide

Lesson 5

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