Solids and Plasmas Answers

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How does the motion of particles in the sun’s plasma compare to the motion of particles in a solid?

A
Particles in both the plasma and a solid move around to fill available space.
B
Particles in the plasma move randomly, but particles in a solid vibrate in one place.
C
Particles in the plasma have low kinetic energy, but particles in a solid have high kinetic energy.
D
Particles in both the plasma and a solid are made up of fast-moving electrons and cations.
3

Substance X has a fixed volume, and the attraction between its particles is strong. Substance Y has widely spread out particles and can be compressed. What can most likely be concluded about these substances?

A
Substance X is a crystal, and substance Y is a liquid.
B
Substance X is a gas, and substance Y is a plasma.
C
Substance X is a plasma, and substance Y is a crystal.
D
Substance X is a solid, and substance Y is a plasma.
5

Which best explains why a crystal is incompressible?

A
Its molecules remain in position without vibrating.
B
The molecules of a crystal behave like those of a gas.
C
There is little, if any, space left between its adjacent molecules.
D
Its molecules switch positions when they are compressed.
6

Which description best characterizes the motion of particles in a solid?

A
slow but able to move past one another
B
fast and widely spaced
C
not moving
D
vibrating around fixed positions
7

The repeating subunits that are responsible for the shape of a crystal are known as

A
unit cells.
B
heavy nuclei.
C
light electrons.
D
amorphous cells.
8

Which is an example of a plasma that occurs in nature?

A
a burning tree
B
the radiant sun
C
a melting candle
D
an electric current
10

What are thermal plasmas?

A
plasmas that have particles that collide infrequently
B
plasmas that reach a temperature equal to their surroundings
C
plasmas that do not reach thermal equilibrium
D
plasmas that have only a few particles ionized at any given moment

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