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Eyes and Ears

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The coloured part of the eye is the iris.

Eyes and Ears

Your eyes and ears work together to sense the world. Eyes detect light and color, while ears hear vibrations, helping you understand your surroundings.

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Fascinating Fact:

Goldfish don’t have eyelids – they sleep with their eyes open all the time!

In KS2 Science, students explore how eyes and ears detect signals from the environment. Light waves and sound vibrations are processed by the brain, allowing humans to see and hear clearly.

  • Retina: A layer at the back of the eye that senses light and creates signals for the brain.
  • Cochlea: A spiral-shaped part of the inner ear that changes sound vibrations into signals for the brain.
  • Optic Nerve: The nerve that carries visual information from the eye to the brain.
How do the eyes and ears send signals to the brain?

The eyes use the optic nerve to send light signals, while the ears use the auditory nerve to send sound signals. The brain interprets these signals into sight and hearing.

What part of the ear detects sound vibrations?

The cochlea in the inner ear detects vibrations and converts them into electrical signals for the brain to process as sound.

Why are the eyes and ears important in daily life?

Eyes and ears are important because they help us navigate our surroundings, communicate with others, and stay safe by detecting light, color, and sound.

1 .
How can you look after your ears?
By not listening too often to very loud music
By never putting anything in your ear
By wearing ear protectors around loud machinery
All of the above
If you look after your ears you should always be able to hear
2 .
Which is the coloured part of the eye?
The cornea
The pupil
The iris
The retina
The colour of the iris is what we mean when we say someone has brown or blue or green eyes. Although it looks black, the pupil has no colour, because it is a hole
3 .
Sound waves cause which three small bones in the ear to vibrate?
Ossicles
Follicles
Ampullae
Cochlea
The ossicles are the smallest bones in the human body
4 .
Which nerve takes signals from the eye to the brain?
Spinal nerve
Optic nerve
Auditory nerve
Olfactory nerve
Optic means 'related to vision'
5 .
Sound waves travel down the ear canal before hitting what?
The pinna
The inner ear
The ear lobes
The ear drum
The ear drum vibrates when it is hit by sound waves - these vibrations then cause the ossicles to vibrate
6 .
The ear has two main functions - one is to hear but what is the other?
To sense changes in the weather
To sense changes in position
To sense changes in temperature
To regulate hormones
Being filled with fluid, the ear can detect any movement we make, therefore helping us to balance - the skin detects changes in temperature, while we use several senses together in order to detect changes in the weather
7 .
Which of the following protects the eye?
The cornea
The retina
The iris
The eyelids
The eyelids, as their name suggests, are protective lids, or covers, for the eyes
8 .
What does the eye respond to?
Colour
Shape
Light
Movement
Although our eyes allow us to see colour, shape and movement, they only respond (react) to light. Try sitting in a dark room before looking at your pupils in a mirror - notice the way your pupils react to changing levels of light
9 .
Which nerve takes signals from the ear to the brain?
Spinal nerve
Optic nerve
Auditory nerve
Olfactory nerve
Auditory means 'related to hearing'
10 .
The lens focuses images onto what at the back of the eye?
The retina
The pupil
Eyelashes
The cornea
The retina is a group of cells that are sensitive to light. They send messages along the optic nerve to the brain, which forms an image
You can find more about this topic by visiting BBC Bitesize - Senses

Author:  Sheri Smith (PhD English Literature, English Teacher & Quiz Writer)

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