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S2 final UT - aidan > Science final UT > Flashcards

Science final UT Flashcards

1
Q

What is the purpose of eyebrow

A

protect the eye from sweat running in

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2
Q

What is the purpose of eyelashes

A

protect the eye from small objects (I.e) dust

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3
Q

What is the purpose of eyelid

A

protect the eye from strong light and dirt

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4
Q

where is the eyeball held in the skull

A

orbit

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5
Q

which part of the eye sends messages to the brain when it detects light

A

cochlea
( specialized sensory cells )

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6
Q

how does the eye react to bright light

A

pupil shrinks in diameter

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7
Q

how does the eye react to dim light

A

pupil enlarges in diameter

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8
Q

what forms on the retina

A

inverted image

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8
Q

name an instrument to see another planet

A

astronomical telescope

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8
Q

name an instrument to see a small part of an insect

A

hand lens

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9
Q

name an instrument to see cells in a tissue

A

microscope

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9
Q

no images can be formed on the blind spot ( T/F )

A

False

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9
Q

name an instrument to see a birds in the sky

A

binoculars

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9
Q

causes of short sight ( 2 )

A

eyeball too long
lens too thick

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10
Q

How do you correct short sight?

A

concave lens

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10
Q

When you have short sight, the image forms ( behind / In-front of ) the retina choose

A

in-front of

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10
Q

causes of long sight( 2 )

A

eyeball too short
lens too thin

10
Q

How do you correct long sight?

A

convex lens

10
Q

When you have long sight, the image forms ( behind / In-front of ) the retina choose

A

behind

11
Q

causes of color blindness ( 2 )

A

inherited ( hereditary )
defect among cone cells

12
Q

difficulties among people with color blindness ( 1 )

A

cannot distinguish red and green

12
Q

difficulties among people with astigmatism ( 1 )

A

blurred vision

12
Q

difficulties among people with cataract ( 1 )

A

blurred vision

13
Q

causes for cataract ( 1 )

A

cloudy lens

14
Q

risks of prolonged exposure to electronic devices ( blue light )

A

retina damage
cataract

15
Q

distance we must keep way from
1. phone
2. tablet
3. computer
( name the distances in cm )

A

phone: 30cm
tablet: 40cm
computer: 50cm

16
Q

name 3 ways we can take care of our eyes

A

do not rub our eyes ( infection )

take breaks from electronic devices every 30 mins

wear sunglasses outdoors in bright light conditions

have regular eye checks

make sure there is sufficient light when reading or using an electronic product

16
Q

Why is the ability to sense and respond among living things important ( name 3 )

A

find mates
avoid danger
find food

17
Q

why cant sound be traveled through a vacuum

A

because there are no particles for the vibrations to be transmitted

17
Q

name mediums of sound ( 3 )

A

solids
liquids
gases

17
Q

purpose of ear bones ( 2 )

A

amplify the vibrations of the eardrum

pass the vibrations into the inner ear

17
Q

what is Hz ( the unit )

A

no. of vibrations/second

higher Hz = higher pitch

17
Q

what is the smallest bone in our body

A

ear bones

18
Q

what is dB ( the unit )

A

loudness of the sounds

18
Q

what is the audible frequency range of a human

A

20 - 20000 ( Hz )

18
Q

what is the audible frequency range of a dog

A

67 - 45000 ( Hz )

19
Q

prolonged exposure to noises above ( )dB may cause permanent damage

A

85 dB

19
Q

what are examples of noise in daily life ( 3 )

A

construction works

machinery

traffic

19
Q

how do we protect our ears ( 3 )

A

wear ear protection

stay away from noisy places

when using earphones, keep the volume low

do not pick our ears with hard objects

19
Q

how does the government control noise pollution

A

noise barriers

time limit on noisy construction works

special material on road surface

20
Q

risks of prolonged exposure to noise ( 2 )

A

perminant hearing loss

deafness

S2 final UT - aidan (4 decks)

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