Chemistry Unit 6 TEST States of matter

A solid substance turns into a liquid. Which best describes this change?

A substance that has a specific shape and volume changes to a substance that has a specific volume.

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

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

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?

Substance X is a solid, and Substance Y is a plasma.

Which best explains why a crystal is incompressible?

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

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

They have mobile charged particles.

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

plasma