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WorksheetsLight and Sight
Total questions: 49
Worksheet time: 25mins
Name
Class
Date
1.
What part of the eye is labeled 1 in the diagram?
a)
Retina
b)
Cornea
c)
Lens
d)
Iris
2.
What part of the eye is labeled 2 in the diagram?
a)
Lens
b)
Retina
c)
Cornea
d)
Cones
3.
What part of the eye is labeled 3 in the diagram?
a)
Cornea
b)
Retina
c)
Lens
d)
Cones
4.
When you see an image of the mountains and the sky in the water, which property of light is being demonstrated?
a)
reflection
b)
water colors
c)
interference
d)
refraction
5.
Which is an example of refraction?
a)
a straw that looks straight
b)
a straw that appears broken
c)
a straw that appears doubled
d)
a straw that appears to vanish
6.
An object's color is determined by the wavelengths of light that it _______.
a)
reflects
b)
diffracts
c)
absorbs
d)
refracts
7.
For an object to be seen, light must leave _______ and enter _______.
a)
the object; the eye
b)
the eye; the object
c)
the eye; the brain
d)
the brain; the eye
8.
If an object emits or reflects light,
a)
it can be seen by the eye.
b)
it has a smooth surface.
c)
it cannot be a gas.
d)
it must be the color white.
9.
If the energy from the light is captured and stored by the surface without being reflected or transmitted, then it has been
a)
absorbed.
b)
refracted.
c)
bent.
d)
scattered.
10.
If white light shines on an object and the object appears blue, this means that
a)
the object reflects blue light more than it does any other color.
b)
the object absorbs all light that strikes it.
c)
the object reflects all light that strikes it.
d)
the object absorbs blue light more than it does any other color.
11.
If you shine a laser pointer into an ice cube, which of the following properties will cause the laser light to bend as it enters the ice cube?
a)
refraction
b)
absorption
c)
reflection
d)
scattering
12.
Light waves that have been emitted or reflected by an object enter the eye and first pass through the transparent layer called the _______, where they are refracted. The light rays are then refracted again as they pass through the transparent _______.
a)
cornea; lens
b)
cornea; retina
c)
retina; cornea
d)
lens; retina
13.
The _______ changes light energy into nerve signals using receptors called rods and cones.
a)
retina
b)
pupil
c)
lens
d)
iris
14.
The retina of the eye is composed of tiny, light-sensitive nerves that transfer the energy of light waves to nerve impulses. These nerve impulses are transmitted through the _______ to the _______ for interpretation as sight.
a)
optic nerve; brain
b)
brain; cornea
c)
cornea; optic nerve
d)
brain; optic nerve
15.
The stem of a flower is put into a vase full of water. The stem looks like it is broken at the point where it enters the water. What form of wave interaction causes the stem to look broken?
a)
refraction
b)
absorption
c)
polarization
d)
reflection
16.
The Sun can be seen because
a)
it produces its own light.
b)
it reflects light from the Moon.
c)
it reflects light from other stars.
d)
it absorbs light from other stars.
17.
To see colors correctly, what must be true about the original light before it hits the object?
a)
The original light is a mixture of colors.
b)
The original light contains only red rays.
c)
The original light cannot reflect off of objects.
d)
The original light contains mostly green rays.
18.
What property of light allows a mirror to show your image?
a)
reflection
b)
amplitude
c)
refraction
d)
intensity
19.
When the lights in a room are dimmed, the eye adjusts to let in as much light as possible. Which part of the eye is most likely to be involved in this process?
a)
pupil
b)
retina
c)
optic nerve
d)
cornea
20.
Which of the following describes the bending of light due to a change in its speed?
a)
refraction
b)
absorption
c)
transmission
d)
reflection
21.
Which of the following describes when light bounces off a surface?
a)
reflection
b)
absorption
c)
refraction
d)
transmission
22.
Which of the following describes when light bounces off a surface?
a)
reflection
b)
refraction
c)
absorption
d)
transmission
23.
Which of the following helps explain how a rainbow of colors can form when sunlight passes through a prism?
a)
Sunlight is made up of a mixture of different colors.
b)
Sunlight is unable to travel through solid materials.
c)
Sunlight only contains light rays that are yellow.
d)
Sunlight always travels in a straight line.
24.
Which of the following surfaces reflects the most light?
a)
aluminum foil
b)
wood shingles
c)
ceramic tiles
d)
plastic cards
25.
Which part of the eye is located at the back of the eye, receives focused light waves from the lens, and is composed of tiny, light-sensitive nerves?
a)
the retina
b)
the cornea
c)
the optic nerve
d)
the convex lens
26.
Why does a red rose look red?
a)
The rose reflects red more than any other color.
b)
The rose refracts red more than any other color.
c)
The rose absorbs red more than any other color.
d)
The rose receives only red light from the Sun.
27.
Why would a wave, such as a light wave, bend when it passes from air into water?
a)
The speed of light slows in water.
b)
The wave does not actually bend, but only appears to bend.
c)
Waves are usually reflected by water.
d)
The light wave interferes with other energy waves in the water.
28.
How are different types of radiation arranged?
a)
By the amount of energy they carry
b)
By how fast they travel
c)
By their sources
d)
By how radioactive they are
29.
What is the difference between a wave and a particle?
a)
A particle is a discrete unit of energy
b)
a particle carries light
c)
A wave moves at the speed of light
d)
A wave carries electricity
30.
Which type of EM radiation has the lowest energy?
a)
Radio waves
b)
Visible light
c)
Gamma rays
d)
Microwaves
31.
Which type of EM radiation has the highest energy?
a)
Gamma rays
b)
Visible light
c)
Radio waves
d)
Microwaves
32.
Which of these transmits information using microwaves?
a)
doppler radar
b)
cell phone
c)
radio tower
d)
x-ray machine
33.
Astronomers often scan the sky using devices called radio telescopes. What can you conclude about these devices?
a)
They pick up the radio waves emitted by stars.
b)
They send radio broadcasts out to distant stars and planets.
c)
They are less powerful than optical telescopes.
d)
They can detect ultraviolet radiation.
34.
Infrared radiation is used to take special pictures called thermographs. What can you infer about the prefix "thermo?"
a)
It means "light"
b)
It means "energy"
c)
It means "heat"
d)
It means "radio"
35.
What might happen if the ozone layer did not block the sun's ultraviolet rays?
a)
Rates of skin cancer would skyrocket
b)
Humans would be able to see in the ultraviolet range of the EM spectrum
c)
Devices that use electromagnetic radiation would no longer work
d)
The surface of the earth would be much hotter
36.
Which word best describes gamma rays?
a)
Destructive
b)
Weak
c)
Visible
d)
Harmless
37.
What do all forms of electromagnetic radiation have in common?
a)
Their speed
b)
Their strength
c)
Their frequency
d)
Their wavelength
38.
What produces electromagnetic radiation?
a)
Electrons changing energy levels
b)
Electrons bonding with other atoms
c)
Electrons leaving the atomic nucleus
d)
Electrons becoming protons or neutrons
39.
What is the outermost part of your eye?
a)
The cornea
b)
The lens
c)
The retina
d)
The pupil
40.
What do the lens and cornea have in common?
a)
They both bend light into a focused beam.
b)
They can both change shape.
c)
They both send messages to the brain.
d)
They both contain photoreceptive cells.
41.
What happens to your pupils when it's extremely bright outside?
a)
They would contract and become very small
b)
They would let a lot of light into your eyes
c)
They would expand and become very large
d)
They would close up completely
42.
How are rods different from cones?
a)
Rods are sensitive to light, while cones can detect color.
b)
Cones are sensitive to light, while rods can detect color.
c)
Cones send images to the brain, while rods do not.
d)
Rods send images to the brain, while cones do not.
43.
Which part of your eye is most like the film in a camera?
a)
The retina
b)
The iris
c)
The pupil
d)
The lens
44.
When light hits the retina, which comes first?
a)
An image is projected onto the retina
b)
The optic nerve transmits signals
c)
Rods and cones transform an image into electrical impulses
d)
The pupil dialates
45.
Which process happens last?
a)
The optic nerve transmits signals
b)
An image is projected onto the retina
c)
Rods and cones transform an image into electrical impulses
d)
The pupil dialates
46.
What role does your brain play in the process of seeing?
a)
It flips upside-down images rightside-up.
b)
It puts blurry images into focus.
c)
It turns black-and-white images into color.
d)
It flips backwards images over so you see them the correct way.
47.
Which animal has better eyesight than humans?
a)
eagle
b)
bat
c)
shark
d)
possom
48.
What might happen if the lens of your eye became damaged?
a)
Your eyes wouldn't be able to focus properly.
b)
You wouldn't be able to see in color.
c)
You wouldn't be able to see at night.
d)
All the images you saw would be upside-down.
49.
What is the best synonym for "photoreceptive?"
a)
Light-sensitive
b)
Tissue-covered
c)
Camera-like
d)
Color-detecting
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