Focus On Life Science: California Grade 7

Chapter 11: The Eye and Light

Standards Review

1.
Under what conditions do light rays travel in straight lines? 6.c
A)The amplitude of the light waves doesn't change.
B)The speed of the light waves doesn't change.
C)The light waves are not scattered.
D)The light waves are not reflected.
2.
The function of the retina in the eye is similar to the function of _______ in a camera. 5.g
A)the lens
B)the shutter
C)film
D)the aperture
3.
How many types of cone cells are there? 5.g, 6.e
A)one
B)three
C)two
D)four
4.
Visible light is a narrow band of wavelengths in _______. 6.a
A)the primary colors
B)an opaque material
C)the electromagnetic spectrum
D)an electromagnetic wave
5.
What color corresponds to visible light waves with the shortest wavelength? 6.a
A)yellow
B)red
C)green
D)violet
6.
Why does a prism produce a colored spectrum when white light passes through it? 6.e
A)The prism produces light waves with different wavelengths.
B)Light waves with longer wavelengths are bent more than light waves with shorter wavelengths.
C)Light waves with shorter wavelengths are bent more than light waves with longer wavelengths.
D)The prism filters out all wavelengths except those corresponding to visible light waves.
7.
A piece of wood is opaque because no light rays are ________ by the wood. 6.f
A)transmitted
B)absorbed
C)reflected
D)scattered
8.
A hand lens produces an enlarged image of an object when the lens is _______ from the object. 6.d
A)greater than one focal length
B)less than one focal length
C)one focal length
D)greater than two focal lengths
9.
Refraction occurs when light waves _______ as they move from one material into another. 6.f
A)are reflected
B)increase their frequency
C)change speed
D)are scattered
10.
In the eye, most of the focusing of light rays occurs when light rays pass through the _______. 6.b
A)pupil
B)lens
C)iris
D)cornea
11.
Which type of cells in the eye are sensitive to dim light? 5.g
A)cones
B)rods
C)cornea
D)ciliary
12.
Making the objective lens larger in a refracting telescope makes the image ________. 6.d
A)smaller
B)larger
C)brighter
D)dimmer
13.
According to the law of reflection, _______. 6.g
A)the angle of reflection equals one half the angle of incidence
B)the angle of incidence equals the angle of reflection
C)the angle of reflection equals two times the angle of incidence
D)the angle of reflection equals the angle of incidence only if the surface is smooth.
14.
What must occur for an object to be seen? 6.b
A)Light rays emitted or reflected from the object must enter the eye.
B)Light rays emitted by the eye must be reflected from the object.
C)Light rays absorbed by the object must enter the eye.
D)Light rays emitted by the eye must be absorbed by the object.
15.
A leaf looks green because the molecules in the leaf _________. 6.b
A)reflect only wavelengths of green light
B)absorb only wavelengths of green light
C)transmit only wavelengths of green light
D)refract only wavelengths of green light
Grade 7
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