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Question 1

Substance cap 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?

Revolt · Accepted Answer

B: Substance  cap x  is a solid, and substance  cap y  is a plasma.

Question 2

Which state of matter is characterized by ionized particles, no definite shape or volume, and good electrical conductivity?

Revolt · Accepted Answer

D: plasma

Question 3

What are thermal plasmas?

Revolt · Accepted Answer

D: plasmas that reach a temperature equal to their surroundings

Question 4

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

Revolt · Accepted Answer

A: Particles in the plasma move randomly, but particles in a solid vibrate in one place.

Question 5

Which is an example of plasmas in nature?

Revolt · Accepted Answer

B: auroras

Question 6

Which reason best explains why plasmas are good conductors of electricity?

Revolt · Accepted Answer

D: They have mobile charged particles.

Question 7

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

Revolt · Accepted Answer

A: unit cells.

Question 8

Which low-energy state of condensed matter is characterized by structural rigidity and resistance to changes of shape or volume?

Revolt · Accepted Answer

B: solid

Question 9

Which best explains why a crystal is incompressible?

Revolt · Accepted Answer

A: There is little, if any, space left between its adjacent molecules.

Question 10

What happens when the kinetic energy of molecules increases so much that electrons are released by the atoms, creating a swirling gas of positive ions and negative electrons?

Revolt · Accepted Answer

A: Matter changes to a plasma state.

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