SENSES OF TASTE, HEARING AND SIGHT. YEAR 9

  1. State the taste of the following solutions:
  2. Vinegar : ______
  3. Salt solution : ______
  4. Aspirin solution : ______
  5. Honey : ______
  6. Why is it that a dry tongue cannot taste food well?

______

  1. Complete the flow chart below:
  1. Tom is having a flu. He cannot smell his food well and finds the food tastes less tasty. Briefly explain why.

______

  1. Why does food taste better when it is warm?

______

  1. Label the diagram below:

  1. Complete the table below:

Outer Ear / Middle Ear / Inner Ear
  1. Which structure is connected to the auditory nerve?

______

  1. Name TWO structures which do not play a part in hearing?
  2. ______
  3. ______
  4. Name the structure that detects vibration and changes it into nerve impulses.

______

  1. Which part of the ear is disturbed when a person suffers from seasickness?

______

  1. Complete the following:

  1. Complete the flow chart below:

  1. Name the parts of the ear that are described below:
  2. Shaped like a funnel:

______

  1. A long tube connecting the ear to the throat:

______

  1. A small membrane located behind the ossicles:

______

  1. The ossicles comprise:
  2. ______
  3. ______
  4. ______
  5. Give the function of the following parts of the ear:
  6. Oval window : ______
  7. Eardrum : ______
  8. Cochlea : ______
  9. The sequence below shows how we hear:

PINNA  P  Q  R  S  T  AUDITORY NERVE  BRAIN

  1. What do P, Q, R, S and T represent?
  2. P : ______
  3. Q : ______
  4. R : ______
  5. S : ______
  6. T : ______
  7. Which part of the ear amplifies sound vibrations?
  1. Other than acting as a sensory organ for hearing, state ONE more function of the ear.

______

  1. Which part of the ear carries out the function mentioned in Question (18)?

______

  1. Label the following:

  1. Complete the table below:

Part of the eye / Function
Helps to focus the light on the retina
Controls the size of the pupil
Protects and gives the eyeball its shapes
Black in colour to absorb light / prevents reflection in the eyes
Controls the amount of light entering the eyes
Maintains the shape of the eyeball and helps focus light
Focuses the light to form an image on the retina
Holds the lens
Controls the thickness of the lens
Maintains the shape of the eyeballs and helps focus light
Receives light stimuli and converts stimuli into nerve impulses
The most sensitive area of the retina/comprises cells which detect light and generate impulses
The part of the retina which is not sensitive to light
Sends nerve impulses to the brain for interpretation
  1. Why is the retina sensitive to light stimulus?

______

  1. Name the part of the retina that is:
  2. Most sensitive to light

______

  1. Least sensitive to light

______

  1. Name FOUR parts of the eye that refract or bend light rays onto the retina:
  2. ______
  3. ______
  4. ______
  5. ______
  6. What happens when an image is formed on the retina?

______

  1. The image that is formed on the retina is upside down. However, we see it as the right way up. Why?

______