Instruction Active
Reviewing Vocabulary
Match each term with the appropriate definition.
atom or molecule with a net electric charge
differentiate
most important; fundamental
ion

to distinguish between two or more objects
plasma
state of matter consisting of freely moving
ions and electrons
primary
Done
) Intro

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?