Focus On Life Science: California Grade 7

Chapter 11: The Eye and Light

Standard Assessment

1.
How many lenses are used in a light microscope? 6.d
A)1
B)2
C)0
D)3
2.
The __________ of an electromagnetic light wave determines the color of the light. 6.e
A)amplitude
B)compression speed
C)frequency
D)pitch
3.
The electromagnetic spectrum is the complete range of electromagnetic wave frequencies and _______. 6.a
A)directions
B)wavelengths
C)angles
D)colors
4.
Light rays through a convex lens bend so they _______ . 6.d
A)are parallel
B)spread apart
C)come together
D)reflect light
5.
Reflection occurs when a wave __________ . 6.f
A)strikes an object and bounces off of it
B)compresses air particles as it travels
C)causes ripples in a pool of water
D)bends and changes speeds as it travels
6.
A person who cannot see far away objects clearly is ________. 6.d
A)blind
B)farsighted
C)color deficient
D)nearsighted
7.
Light waves are _______ waves. 6.a
A)sound
B)electromagnetic
C)compressional
D)energy
8.
The __________ is an imaginary line perpendicular to the surface of a medium where a wave strikes it. 6.g
A)diffraction grating
B)incidence
C)normal
D)interference
9.
The bending of a light wave as it moves from one medium into another is called __________ . 6.f
A)refraction
B)reflection
C)diffraction grating
D)interference
10.
The distance between one point on a wave and the nearest point moving with the same speed and direction is the _______. 6.a
A)wavelength
B)frequency
C)intensity
D)pitch
11.
Light enters the eye through the _______. 6.b
A)retina
B)iris
C)lens
D)cornea
12.
Why can't you see your reflection in a brick wall? 6.b
A)No light is reflected from a brick wall.
B)Light rays are reflected in many directions from the uneven surface.
C)Light rays are reflected in only one direction from the rough surface.
D)Reflection of light from a rough surface is regular reflection.
13.
To observe a planet in the night sky, it is best to use a ________. 6.d
A)microscope
B)refracting telescope
C)reflecting telescope
D)camera
14.
The point where light rays converge is the _____. 6.d
A)focal length
B)focal point
C)path
D)optical axis
15.
The _______ of a wave is the number of wavelengths that pass by a point each second. 6.a
A)wavelength
B)frequency
C)pitch
D)intensity
16.
The shape of the _______ changes when you focus on nearby and distant objects. 6.d
A)optic nerve
B)cornea
C)retina
D)lens
17.
Which of the following best describes why refraction of a wave occurs when the wave travels from one material into another? 6.f
A)The wavelength increases.
B)The speed of the wave changes.
C)The amplitude increases.
D)The frequency decreases.
18.
Which of the following types of waves can travel through space? 6.a
A)transverse
B)mechanical
C)electromagnetic
D)compressional
19.
The entire range of electromagnetic wave frequencies is known as __________. 6.a
A)visible light
B)the electromagnetic spectrum
C)ultraviolet radiation
D)magnetism
20.
In which of the following materials will light travel fastest? 6.f
A)air
B)vacuum
C)water
D)glass
Grade 7
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