Solids and plasmas assignment and quiz

Keisha makes a table to compare plasmas and solids. Plasma Solid Kinetic energy X Density Y Which labels belong in the cells marked X and Y? X: High Y: High X: High Y: Low X: Low Y: High X: Low Y: Low

X: High Y: High

Which of the following are examples of plasmas? ice cubes tails of comets a gas fire the ionosphere a neon sign a flashlight

tails of comets, the ionosphere, a neon sign

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 solid state. Matter changes to a liquid state. Matter changes to a plasma state. Matter changes to a gaseous state.

Matter changes to a plasma state.

Which best explains why a crystal is incompressible? Its molecules remain in position without vibrating. The molecules of a crystal behave like those of a gas. There is little, if any, space left between its adjacent molecules. Its molecules switch positions when they are compressed.

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

Explain why a fluorescent light bulb is not as hot as an incandescent light bulb.

Which of the following points does your response include? Particles in plasmas collide more often, but that does not necessarily give them higher temperature. Plasma particles have high kinetic energy (they move quickly). Plasma particles are far apart. The plasma in a fluorescent bulb has a low density.

Suppose you were given a substance and asked to determine whether or not it was a plasma. Write the characteristics you would look for to identify the substance.

Which of the following points does your response include? Particles in plasmas collide more often. Plasma particles have high kinetic energy (they move quickly). Plasma particles are far apart. The ionized particles have no fixed volume

Which is an example of plasmas in nature? solar cells plasma balls auroras clouds

auroras

Particles in a plasma experience... collisions than particles in a solid. Based on their state of matter alone, is it easier to speak of the shape of the Sun or the Moon? Two unknown substances are in identical beakers. One is a solid and the other is a plasma. If you were given a scale to allow you to obtain the mass of the substance, and had to guess based on mass alone, you would say that the plasma is in the ... beaker.

more, moon, lighter

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 thermal plasma. ionized plasma. low density plasma. nonthermal plasma.

nonthermal plasma.

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

plasma

What are thermal plasmas? plasmas that have particles that collide infrequently plasmas that reach a temperature equal to their surroundings plasmas that do not reach thermal equilibrium plasmas that have only a few particles ionized at any given moment

plasmas that reach a temperature equal to their surroundings

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

solid

The repeating subunits that are responsible for the shape of a crystal are known as unit cells. heavy nuclei. light electrons. amorphous cells.

unit cells.

Which description best characterizes the motion of particles in a solid? slow but able to move past one another fast and widely spaced not moving vibrating around fixed positions

vibrating around fixed positions