3.3 Hearing

Are you ready?
- Phone in your locker
- Coats are on the coat rack or in your locker
- Bags are off the table
- Take off your hat or hoodie
- Books and laptops are on the table
- Did you do your homework?
 
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Slide 1: Slide
BiologieMiddelbare schoolhavo, vwoLeerjaar 1

This lesson contains 18 slides, with interactive quizzes, text slides and 2 videos.

Items in this lesson

Are you ready?
- Phone in your locker
- Coats are on the coat rack or in your locker
- Bags are off the table
- Take off your hat or hoodie
- Books and laptops are on the table
- Did you do your homework?
 

Slide 1 - Slide

3.3 Hearing
Chapter 3: Observing

Slide 2 - Slide

Today
Welcome
Learning objectives
Test knowledge about the ears
Video
Instruction 3.3
Homework
End of class

Slide 3 - Slide

Learning objectives
  • You will learn about the construction of your ears and which sounds you are able to hear.




Slide 4 - Slide

Why does an African elephant have such big ears?
A
To better capture sounds
B
To cool down
C
To communicate
D
All of the above

Slide 5 - Quiz

How do you call the outside of your ear?
A
Earshell
B
Auricle
C
Retina
D
Auditory canal

Slide 6 - Quiz

Which part of your ear can be damaged by ear buds or other sharp objects?
A
Auditory canal
B
Tympanic cavity
C
Auricle
D
Eardrum

Slide 7 - Quiz

Slide 8 - Video

Slide 9 - Video

Slide 10 - Slide

Tekst
auditory/ear canal
auricle
eardrum
ossicles
cochlea

Slide 11 - Drag question

Tones in hertz
  • Humans can hear between ± 20 en 20 000 Hz .

- Lowest limit of hearing (onderste gehoorgrens) = lowest tone someone can hear

- Highest limit of hearing (bovenste gehoorgrens )= highest tone someone can hear

-Hearing range  (gehoorbereik) = Range between highest and lowest limit
Elderly people: hairs on the sensory cells in the cochlea break. The highest limit drops to 15000 Hz

Slide 12 - Slide

Slide 13 - Slide

Sound level (Geluidsniveau)
In decibel (dB)

130 dB and higher: chance of becoming deaf

Slide 14 - Slide

The Eustachian tube (De buis van Eustachius)
Tube that connects the tympanic cavity with the pharynx (keelholte). 

Arranges that the pressure of air is equal on both sides of the eardrum.

Ear infection (middenoorontsteking) = infected tympanic cavity

Slide 15 - Slide

Sense of balance 
Sence of balance (evenwichtsorgaan) = organ at the cochlea in the ear; consists of 3 semicircular canals filled with liquid an sensory cells.

Function: to pervieve the twisting movement of your head. 

Slide 16 - Slide

What?
3.3 assignments 4-7, 9, 11, 12, 16, 20
How?
In your workbook (or computer). Use the information from your textbook. 
Help?
You may gently consult with your neighbor. Raise your hand if the two of you can't figure it out.
Time?
10 minutes
Finished?
Check your answers of 3.1-3.3. Write a summary of 3.1 and 3.2.
Product
You have practiced 3.3!

Slide 17 - Slide

Let's discuss the lesson!

Don't pack your bags yet!
What did you learn today?

When de bell rings:
- Pull up your chairs
- Don't forget your phone

Slide 18 - Slide