UNIT 2 & 7GRADE 6 SCIENCE

How much of the dead skin is shed by an average adult in a life time ?

• 40 kg

• 10 kg

• 20 kg

• 5 kg

Diameter of the human eye is :

• 3 cm

• 2.5 cm

• 1 cm

• 3.5 cm

A transparent layer in front of the eyeball is:

• RETINA

• LENS

• CORNEA

• IRIS

On an average man , the area of skin is nearly ------------ square metres.

• 1.4

• 1.8

• 2.8

• 3

Coloured part of the eye is called:

• IRIS

• PUPIL

• CORNEA

• RETINA

Most sensitive part of the retina is called:

• BLIND SPOT

• YELLOW SPOT

• CHOROID

• OPTIC NERVE

Thickness of the eye lens is controlled by the :

• AQUEOUS HUMOUR

• CILIARY MUSCLES

• CORNEA

• IRIS

The nerve that takes information from the eye to the brain is called:

• AUDITORY NERVE

• OLFACTORY NERVE

• OPTIC NERVE

• CHOROID

Snail shaped organ in the inner ear is called:

• COCHLEA

• OSSICLES

• EAR CANAL

• EAR DRUM

A black layer that stops light reflecting inside the eyeball is called :

• CONJUCTIVA

• CHOROID

• RETINA

• BLIND SPOT