Parts of the eye
What is the function of the lens?
Bends light rays onto the retina
Through which part of the eye does light first enter?
The pupil
fill in the blanks.
The ear is an organ for ______ and _______.
hearing and balancing
What name is given to the coiled part of the ear?
Cochlea
How does sound travel?
Sound travels as waves, from the source outwards in all direction.
What is another name for the cornea?
Sclera
What happens to the pupil in bright light?
it gets smaller
Name the three layers of the ear.
What takes sound messages to the brain?
The auditory nerves
What are the mediums that sound needs to travel?
Solid, liquid and gas
What name is given to the coloured part of the eye?
The iris
What controls the amount of light entering the eye?
The muscles of the iris
Which part of the ear collects sound waves?
The pinna, earlobe or ear flap
What name is given to frequencies below the human earing range?
infrasound
What happens when sound travels across an empty space?
it produces an echo
What is the white part of the eye called?
The sclera or sclerotic
What carries electrical signal from the eye to the brain?
The optic nerve
What is the general name for the three small bones in the ear?
ossicles
Frequencies above human earing range is called ____?
ultrasound
Through which state of matter does sound travels the fastest?
soilid
The name of the watery fluid that fills the space between the cornea and lens?
The aqueous humour
Which type of lens is prescribed for a person who is near-sighted?
concave lenses
What are the specific names of the three small bones in the ear?
Hammer, anvil and stirrup or Malleus , incus and stapes.
What is the name of the tube that connects the middle ear to the throat?
The Eustachian tube
When you change the length, thickness or tightness of a string, you change its ______.
pitch