[states of matter and gasses] SOLIDS AND PLASMAS *pre-test*

Which is an example of plasmas in nature?

Auroras

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?

Matter changes to a plasma state.

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.

Keisha makes a table to compare plasmas and solids. Which labels belong in the cells marked X and Y?

X: High Y: High

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?

an amorphous solid because the particles do not have a regular structure

A plasma that has particles that never collide frequently enough to exchange kinetic energy and never reach a temperature equal to the surroundings is categorized as a

nonthermal plasma.

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

plasma

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

the radiant sun

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

vibrating around fixed positions