Science final UT

Question 1

What is the purpose of eyebrow

Answer 1

protect the eye from sweat running in

Question 2

What is the purpose of eyelashes

Answer 2

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

Question 3

What is the purpose of eyelid

Answer 3

protect the eye from strong light and dirt

Question 4

where is the eyeball held in the skull

Answer 4

orbit

Question 5

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

Answer 5

cochlea
( specialized sensory cells )

Question 6

how does the eye react to bright light

Answer 6

pupil shrinks in diameter

Question 7

how does the eye react to dim light

Answer 7

pupil enlarges in diameter

Question 8

what forms on the retina

Answer 8

inverted image

Question 8

name an instrument to see another planet

Answer 8

astronomical telescope

Question 8

name an instrument to see a small part of an insect

Answer 8

hand lens

Question 9

name an instrument to see cells in a tissue

Answer 9

microscope

Question 9

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

Answer 9

False

Question 9

name an instrument to see a birds in the sky

Answer 9

binoculars

Question 9

causes of short sight ( 2 )

Answer 9

eyeball too long
lens too thick

Question 10

How do you correct short sight?

Answer 10

concave lens

Question 10

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

Answer 10

in-front of

Question 10

causes of long sight( 2 )

Answer 10

eyeball too short
lens too thin

Question 10

How do you correct long sight?

Answer 10

convex lens

Question 10

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

Answer 10

behind

Question 11

causes of color blindness ( 2 )

Answer 11

inherited ( hereditary )
defect among cone cells

Question 12

difficulties among people with color blindness ( 1 )

Answer 12

cannot distinguish red and green

Question 12

difficulties among people with astigmatism ( 1 )

Answer 12

blurred vision

Question 12

difficulties among people with cataract ( 1 )

Answer 12

blurred vision

Question 13

causes for cataract ( 1 )

Answer 13

cloudy lens

Question 14

risks of prolonged exposure to electronic devices ( blue light )

Answer 14

retina damage cataract

Question 15

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

Answer 15

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

Question 16

name 3 ways we can take care of our eyes

Answer 16

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

Question 16

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

Answer 16

find mates avoid danger find food

Question 17

why cant sound be traveled through a vacuum

Answer 17

because there are no particles for the vibrations to be transmitted

Question 17

name mediums of sound ( 3 )

Answer 17

solids liquids gases

Question 17

purpose of ear bones ( 2 )

Answer 17

amplify the vibrations of the eardrum pass the vibrations into the inner ear

Question 17

what is Hz ( the unit )

Answer 17

no. of vibrations/second higher Hz = higher pitch

Question 17

what is the smallest bone in our body

Answer 17

ear bones

Question 18

what is dB ( the unit )

Answer 18

loudness of the sounds

Question 18

what is the audible frequency range of a human

Answer 18

20 - 20000 ( Hz )

Question 18

what is the audible frequency range of a dog

Answer 18

67 - 45000 ( Hz )

Question 19

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

Answer 19

85 dB

Question 19

what are examples of noise in daily life ( 3 )

Answer 19

construction works machinery traffic

Question 19

how do we protect our ears ( 3 )

Answer 19

wear ear protection stay away from noisy places when using earphones, keep the volume low do not pick our ears with hard objects

Question 19

how does the government control noise pollution

Answer 19

noise barriers time limit on noisy construction works special material on road surface

Question 20

risks of prolonged exposure to noise ( 2 )

Answer 20

perminant hearing loss deafness