5.3 hearing and sight

• Biologie
• Middelbare school
• mavo, havo
• Leerjaar 1

start task 

5.3 Hearing and sight

1. Copy the learning objectives to your zuidschrift
2. Join this LessonUp

Learning goals: 

I know how the ear and the eye are structured.

I can explain how sound and light are perceived.

planning

1. Review: feeling, smelling, tasting
2. explanation of the ear (+ notes)
3. assignments 1 + 2
4. explanation of the eye (+ notes)
5. assignment 3
6. homework: assignment 4

review bs2

5.2.3 You can describe the structure and functions of the skin.

5.2.4 You can explain how you smell different scents.

5.2.5 You can explain how you taste different flavours.

Lagen van de huid

epidermis

dermis

corneal layer

parts of the skin

blood vessel

hair

hair muscle

sweat gland

sebeceous gland

skin

mucsle

subcutanous fat layer

sense	location	stimulus
sight
hearing
balance
smell
taste
heat
cold
pressure
touch

eye

ear

tongue

skin

skin

skin

skin

ear

nose

 light

sound

gravity

odour

taste

heat

cold

pressure

gentle pressure

5.3 Hearing and sight

laptop away

zuidschrift + pen ready

Learning goals: 

I know how the ear and the eye are structured.

I can explain how sound and light are perceived.

the ear

Auricle → catches vibrations

Ear canal → carries vibrations to the eardrum

Eardrum → starts to vibrate

Ossicles → pass on the vibrations

Cochlea → turns vibrations into impulses

Auditory nerve → sends impulses to the brain

Kernvraag: Wat gebeurt er met een geluidstrilling tot die in je hoofd aankomt?

What	Do exercises 1 and 2 (pp 104-105 )
How
Help	.
Done?	Start assignment 3, pp 104-105. Use figures 3 and 4 on pp 102-103.

1. Book: Use the text and images from pages 101-104
2. Neighbour
3. Teacher

You may quietly work together with your neighbour.

Conversations be about the exercises.

I know how the ear and the eye are structured.

I can explain how sound and light are perceived.

start task 

5.3 Hearing and sight

1. copy learning goals (if necessary)

Learning goals: 

I know how the ear and the eye are structured.

I can explain how sound and light are perceived.

planning

1. explanation of the pupil reflex + how the eye works (+ notes)
2. assignment on the pupil reflex
3. assignments 5 to 9
4. homework: assignment on connection

the eye

• 
  
• Light → through cornea + lens → onto the retina (netvlies)
• Retina → turns light into an impulse
• Iris: controls amount of light through the pupil
• Fovea → small pit in the retina responsible for sharp vision
• Optic nerve → sends impulses to the brain
• Image on the retina = upside down

video

video

Light → lens

Lens focuses (rounder/flatter)

Image → fovea

Image = upside down

Brain flips it upright

Pupil reflex = automatic → more light = smaller pupil

There are two types of muscles in the iris:

• Circular muscles make the pupil small (iris wider).

• Radial muscles make the pupil large (iris narrower).

What	do assignments 4b, (5,) 7, 8, 10 pages 107-109
How
Help	.
Done?	Check and correct (classroom). Test yourself + flash cards (bvj online)

1. Book: Use the text and images from pages 101-104
2. Neighbour
3. Teacher

You may quietly work together with your neighbour.

Conversations be about the exercises.

I know how the ear and the eye are structured.

I can explain how sound and light are perceived.

What	Do exercises 1, 2 and 3 (pp 104-106 )
How
Help	.
Done?	Homework: exercise 4a (pp 106) Check and correct (classroom).

1. Book: Use the text and images from pages 101-104
2. Neighbour
3. Teacher

You may quietly work together with your neighbour.

Conversations be about the exercises.

I know how the ear and the eye are structured.

I can explain how sound and light are perceived.

How does sound enter your ear?

auditory canal

eardrum

auditory ossicles

cochlea

auditory nerve

Drag the words

to the correct description

Iris

Sclera

Pupil

tear duct

tear gland

eyebrow

The white part of your eye around the iris.

The coloured part of your eye.

Black hole in your eye.

Produces tears

Protects your eye from dust and sweat.

Carries away dust and dirt to your nose.

retina

optic nerve

lens

cornea

choroid

sclera

retina

choroid

Detects light stimuli

Protects everything inside the eye

This contains the blood vessels that transport substances the eye needs.

A beam of light enters the eye.

Put the parts of the eye that the light passes through, in the correct order.

Lens

cornea

vitreous body

retina

pupil

5.3 horen en zien

laptop away

zuidschrift + pen ready!

Learning goals: 

I know how the ear and the eye are structured.

I can explain how sound and light are perceived.

nearsightedness

farsightedness

Nearsighted = eye too long → image falls in front of the retina

→ solution: glasses with a concave lens

Farsighted = eye too short → image falls behind the retina

→ solution: glasses with a convex lens

Practical: the pupil reflex

(book page 156)

Materials: toilet paper roll, mirror

Work in pairs

Observe your pupil as light changes

Complete assignment 1.

Finished? Start on assignments 4b, 7, 8, 10 pages 107-109