Eyes

Question 1

Define Iris

Answer 1

Coloured part of the eye

Question 2

Define pupil

Answer 2

Opening in the centre of the iris

Question 3

Retina

Answer 3

sensory tissue at the back of the eye

Question 4

Lens

Answer 4

Focuses light onto to retina

Question 5

Vitreous humour

Answer 5

Thick transparent liquid

Question 6

Sclera

Answer 6

Outer tough membrane converging all of the eye ball

Question 7

Optic nerve

Answer 7

Send electrical impulses from the retina to the brain

Question 8

Cornea

Answer 8

Clear dome shaped protective tissue that is covering the pupil and iris

Question 9

Steps when light enters our eyes

Answer 9

As light enters the cornea it is transmitted through the transparent layer. Light is than refracted through the lens so it focuses on the retina the vitreous humour is transparent so light transmits through it finally the light is absorbed by the cells in the retina

Question 10

How have types of cell are in the retina

Answer 10

2 types
Rod cells (detect light and dark
Cone cells detect colour
Red rod cell
Green rod cell
Blue rod cell
(Primary colours of light)

Question 11

Primary colours of light

Answer 11

Blue, green,red

Question 12

Secondary Color’s

Answer 12

Magenta,cyan,yellow