WorksheetsScience
Total questions: 17
Worksheet time: 9mins
Which structure shown in the diagram below changes its thickness when a person focuses objects at different distances?
A
B
C
D
Peter is long-sighted, the possible reasons is
(1) his eyeball is too long.
(2) the lens of his eye is too thin.
(3) the deficiency of vitamin A in his diet.
(1) only
(2) only
(1) and (3) only
(1), (2) and (3)
Mary is looking at a picture. If the image of the picture falls on the blind spot, she would see
a blurred picture.
a picture in black and white.
a blurred picture in black and white.
nothing.
Which of the following combinations about structure of the eye and its functions is INCORRECT?
Structure Function
A. Jelly-like fluid Maintain the shape of the eyeball
B. Sclera Protect the eyeball
C. Optic nerve Detect light and produce signal
D. Cornea Help focus light
A
B
C
D
Which kind of eye defect does the diagram below show?
Colour-blindness
Short sight
Long sight
Cataract
Which of the following correctly shows the path of light entering the eyes?
cornea → pupil → lens → jelly-like fluid → retina
pupil → iris → lens → jelly-like fluid → retina
iris → lens → jelly-like fluid → retina → sclera
cornea → pupil → lens → jelly-like fluid → sclera
Which of the following statements about light-sensitive cells is correct?
Most rod cells are situated at the blind spot.
Rod cells can only work well in bright light conditions.
We cannot distinguish colour if only rod cells are stimulated.
There is only one type of cone cells.
Which structure contains specialised sensory cellls
?
A
B
C
D
Which of the following is the function of D?
It collects sound from the surrounding.
It can detect sound vibrations.
It amplifies the sound vibrations.
It converts the sound energy into vibrations.
Which structure carry signals to the brain?
A
B
C
D
What is the name of B?
Auditory nerve
Eardrum
Ear bones
Optic nerve
In many movies, a loud sound is heard when a spacecraft travels in space. Actually, if you are an astronaut nearby the spacecraft, you cannot hear the sound. Why?
It is because the sound energy is absorbed by the space.
It is because the sound energy is lost to the space.
It is because the air particles cannot vibrate in the space.
It is because there is no air particle to transmit sound in the space.
The unit of sound level is
joule
hertz
decibel
pascal
Which of the following statements about frequency is correct?
A normal person cannot hear a sound with frequency above 10 000 Hz.
A normal person cannot hear a sound with frequency below 100 Hz.
The faster an object vibrates, the lower is the frequency of the sound produced.
Generally the voice of an adult woman is at a higher frequency than that of an adult man
Which of the following structure(s) help us to maintain balance?
(1) Structure Q
(2) Structure R
(3) inner ears
(1) only
(2) only
(1) and (3) only
(2) and (3) only
Which of the following organs interprets the messages produced from the sense organs?
Brain
Heart
Lungs
Muscle
Sounds with frequencies above 20,000 Hz are beyond the human audible frequency range. They are called ultrasound.
Which of the following products make(s) use of ultrasound?
(1) only
(2) only
(1) and (3) only
(2) and (3) only
