Solids and Plasmas Answers

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1
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Which is an example of plasmas in nature?

A
solar cells
B
plasma balls
C
auroras
D
clouds
2
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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 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
6

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
8

A group of students are wandering around a room. When their teacher claps, the students sit down wherever they are.This situation best models the formation of which type of solid?

A
an amorphous solid because the particles do not have a regular structure
B
an amorphous solid because the motion of the particles stopped
C
a crystalline solid because the moving particles lock into fixed positions
D
a crystalline solid because the particles have a long-range order
9

Temperature depends on the average kinetic energy of the particles in a sample. How does this help explain why a plasma-based light does not have a high temperature?

A
No particles in the plasma have high kinetic energy.
B
The fastest particles have the greatest mass.
C
Most particles in the plasma are heavy, slow, and very low density.
D
The fastest particles transfer most of their energy through collisions.
10

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.

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