AnswersOC27 EarthSpace Sci-2001310-S2-NelsonUnit Test

Unit 8 Test Answers

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Four students made a graphic organizer describing the parts of the atom.Which table best describes the parts of the atom?

A
A 3 column table with 3 rows. The first column is labeled particle with entries proton, electron, neutron. The second column is labeled charge with entries positive, 0, negative. The last column is labeled location with entries outside nucleus, outside nucleus, inside nucleus.
Option A
B
A 3 column table with 3 rows. The first column is labeled particle with entries proton, electron, neutron. The second column is labeled charge with entries negative, 0, negative. The last column is labeled location with entries inside nucleus, outside nucleus, inside nucleus.
Option B
C
A 3 column table with 3 rows. The first column is labeled particle with entries proton, electron, neutron. The second column is labeled charge with entries 0, negative, positive. The last column is labeled location with entries outside nucleus, inside nucleus, inside nucleus.
Option C
D
A 3 column table with 3 rows. The first column is labeled particle with entries proton, electron, neutron. The second column is labeled charge with entries positive, negative, 0. The last column is labeled location with entries inside nucleus, outside nucleus, inside nucleus.
Option D
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Which best describes what is occurring when a door is almost closed and rays of light fan out from the small opening?

A
absorption
B
interference
C
refraction
D
diffraction
44

A lab technician needs to clean medical instruments that have been exposed to bacteria. Which electromagnetic wave would be most useful for this task?

A
infrared
B
radio
C
ultraviolet
D
microwave
45

What parts are found in an electric generator? Select 4 options.

A
an armature
B
a battery
C
a permanent magnet
D
an electromagnet
E
brushes
F
slip rings
46

What is released when an excited electron returns to a lower energy state?

A
an isotope
B
a proton
C
electricity
D
electromagnetic radiation
47

What causes the appearance of lines in an emission spectrum?

A
Light is absorbed as an electron moves to a higher energy state.
B
Light is released as an electron moves to a lower energy state.
C
An electron is released as light when it moves to a lower energy state.
D
An electron is released as light when it moves to a higher energy state.
48

The diagram shows an electric motor.

Question illustration
A
W
B
X
C
Y
D
Z
49

Which best describes electromagnetic waves moving from gamma rays to radio waves along the electromagnetic spectrum?

A
Wavelength and frequency decrease.
B
Wavelength and frequency increase.
C
Wavelength increases, and frequency decreases.
D
Wavelength decreases, and frequency increases.
50

Which best describes what happens in an electric generator?

A
Motion causes constantly changing magnetic fields to induce electrical energy.
B
Motion causes constantly changing magnetic fields to induce kinetic energy.
C
Constantly changing magnetic fields lead to motion, which induces electrical energy.
D
Constantly changing magnetic fields lead to motion, which induces kinetic energy.
51

Voices of swimmers at a pool travel 400 m/s through the air and 1,600 m/s underwater. The wavelength changes from 2 m in the air to 8 m underwater. How has the change in media affected the frequency of the wave?

A
It increased.
B
It decreased.
C
It stayed the same.
D
It cannot be calculated.
52

Which best describes why a diamond ring will sometimes sparkle different colors in normal white light?

A
absorption
B
interference
C
refraction
D
destruction

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