Focus On Life Science: California Grade 7

Chapter 11: The Eye and Light

Math Practice

1.
The wavelength of gamma rays is approximately 1 x 10exp19 Hz. Express this number as a decimal.
A)10,000,000,000,000,000,000 Hz
B)10,000,000,000,000,000 Hz
C)10,000,000,000,000 Hz
D)10,000,000,000,000,000,000,000 Hz
2.
The wavelength of microwaves is approximately 1 x 10exp10 Hz. Express this number as a decimal.
A)10,000 Hz
B)10,000,000 Hz
C)10,000,000,000 Hz
D)10,000,000,000,000 Hz
3.
The wavelength of X-rays is approximately 1 x 10exp17 Hz. Express this number as a decimal.
A)100,000,000,000,000,000 Hz
B)100,000,000,000 Hz
C)100,000,000,000,000 Hz
D)100,000,000,000,000,000,000 Hz
4.
The wavelength of infrared waves is approximately 1 x 10exp12 Hz. Express this number as a decimal.
A)1,000,000,000 Hz
B)1,000,000,000,000 Hz
C)1,000,000 Hz
D)1,000,000,000,000,000 Hz
5.
The wavelength of ultraviolet waves is approximately 7.5 x 10exp15 Hz. Express this number as a decimal.
A)1,000,000,000,000,000,000 Hz
B)1,000,000,000,000 Hz
C)1,000,000,000 Hz
D)1,000,000,000,000,000 Hz
6.
The wavelength of optical waves is approximately 5 x 10exp14 Hz. Express this number as a decimal.
A)500,000,000 Hz
B)500,000,000,000 Hz
C)500,000,000,000,000 Hz
D)500,000,000,000,000,000 Hz
7.
The wavelength of gamma rays is approximately 1 x 10exp-13 J. Express this number as a decimal.
A)0.0000000001 J
B)0.0000000000001 J
C)0.00000001 J
D)0.0000000000000001 J
8.
The wavelength of X rays is approximately 1 x 10exp-15 J. Express this number as a decimal.
A)0.000000000000000001 J
B)0.000000000001 J
C)0.0000000001 J
D)0.000000000000001 J
9.
The wavelength of ultraviolet waves is approximately 1 x 10exp-18 J. Express this number as a decimal.
A)0.000000000000001 J
B)0.000000000000000001 J
C)0.0000000000001 J
D)0.000000000000000000001 J
10.
The wavelength of infrared waves is approximately 1 x 10exp-20 J. Express this number as a decimal.
A)0.00000000000000000001 J
B)0.00000000000000001 J
C)0.000000000000001 J
D)0.00000000000000000000001 J
Grade 7
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