online_test_u11_test..

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online_test_u11_test..
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Chapter 11 Sensing the Environment
1.
When a person looks at an object, which part of the eye will change in thickness
so that light can be focused onto the retina?
(A) iris
(B) lens
(C) cornea
(D) optical nerve
##B##
2.
Which of the following diagrams best shows what happens when light passes
through a pair of short sighted glasses?
(A)
(B)
(C)
(D)
##D##
3.
Humans interpret seeing, hearing, tasting and smelling in the
(1) cerebrum.
(2) cerebellum.
(3) medulla.
(A) (1) only
(B) (2) only
(C) (1) and (3) only
(D) (2) and (3) only
##A##
4.
Sound can be transmitted through
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(A)
(B)
(C)
(D)
##C##
5.
(1) wood.
(2) water.
(3) vacuum.
(1) only
(2) only
(1) and (2) only
(2) and (3) only
What kind of eye defect will result if structure P becomes cloudy?
P
(A)
(B)
(C)
(D)
##B##
colour blindness
cataract
long sight
short sight
6.
When we detect the flavour of a food, which of the following senses is/are
involved?
(1) taste
(2) touch
(3) smell
(A) (1) only
(B) (2) only
(C) (1) and (3) only
(D) (2) and (3) only
##C##
7.
Which of the following structures of eyes help(s) focus light onto the retina?
(1) focusing muscle
(2) cornea
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(A)
(B)
(C)
(D)
##D##
(3) lens
(1) only
(2) only
(1) and (3) only
(2) and (3) only
8.
Which of the following tastes is/are the primary type(s) of tastes?
(1) sour
(2) spicy
(3) salty
(A) (1) only
(B) (2) only
(C) (1) and (3) only
(D) (2) and (3) only
##C##
9.
What is the function of focusing muscle?
(A) It focuses light.
(B) It controls the size of the pupil.
(C) It changes the thickness of the lens.
(D) It squeezes teardrops out of the eyes.
##C##
10. A long-sighted person cannot see a
(i)
object clearly as the image is
formed
(ii)
the retina.
(i)
(ii)
(A)
near
in front of
(B)
near
behind
(C)
distant
in front of
(D)
distant
behind
##B##
11. Which part of our ears is filled up with liquid?
(A) ear canal
(B) auditory nerve
(C) ear bones
(D) cochlea
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##D##
12. Which of the following combinations is correct?
cells P
Name of the cells
(A)
(B)
(C)
(D)
##D##
cells P : rod cells
cells P : cone cells
cells Q : rod cells
cells Q : cone cells
cells Q
Function of the cells
help us see different colours
give black and white vision
give black and white vision
help us see different colours
13. Consider the following experimental set-up. Three students talk to each other
using this set-up. All of them can hear what their partners say.
paper cup
paper clip
string
What is the conclusion of this experiment?
(A) Air particles pass through the string to transmit sound.
(B) Sound is transmitted by the to and fro motions of the cups.
(C) Sound can be transmitted through air.
(D) Sound can be transmitted through a solid.
##D##
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14. Which structure(s) shown in the diagram below is/are transparent?
(1)
(2)
(3)
(A)
(B)
(C)
(D)
##C##
(1) only
(2) only
(1) and (3) only
(2) and (3) only
15. A fish focuses images
(A)
(B)
(C)
(D)
##C##
by changing the shape of the lenses.
by moving the retina forwards and backwards.
by moving the lenses forwards and backwards.
by changing the size of the pupil.
16. What is the audible frequency range of humans?
(A) about 10 – 200 Hz
(B) about 2000 – 10,000 Hz
(C) about 20 – 20,000 Hz
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(D) about 200 – 10,000 Hz
##C##
17. Which structures in the eye can change shape?
(1)
(2)
(3)
(A)
(B)
(C)
(D)
##D##
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
18. When we detect sound with our ears, which structure(s) in the ears will vibrate?
(1) pinna
(2) eardrum
(3) ear bones
(A) (1) only
(B) (2) only
(C) (1) and (3) only
(D) (2) and (3) only
##D##
19. Which of the following is NOT correct?
Stimuli detected
(A)
(B)
(C)
(D)
##C##
heat
light
smell of chemical substances
sound
Sense
touch
sight
taste
hearing
20. The following diagram shows the structure of a human ear.
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structure X
What is the function of structure X?
(A) To collect sound.
(B) To send message to the brain.
(C) To detect the vibrations and changes them into messages.
(D) To magnify the vibrations of the eardrum.
##D##
End