Changing States

Which of the following are the 3 main states of matter in physics?

• gas, water, air

• solid, liquid, gas

• solid, energy, air

• water, vapor , steam

what are changes in state also called?

• permanent changes

• natural changes

• physical changes

• irreversible changes

why are physical changes considered reversible?

• they change the material permanently

• they create new materials

• the particles stay the same, just arranged differently

• the material turns into a gas only

what is melting?

• when a gas turns into a solid

• when a liquid turns into a gas

• when a solid turns into a liquid

• when a liquid turns into a solid

what is evaporation?

• when a gas turns into a liquid

• when a solid turns into a gas

• when a liquid turns into a gas

• when a liquid turns into a solid

what is condensation?

• when a solid changes into a gas

• when a gas changes into a liquid

• when a liquid changes into a gas

• when a solid changes into a liquid

During melting and evaporation, what happens to the particles?

• they slow down and get closer

• they move more and spread out

• they freeze

• they disappear

what do we call the theory that mass stays the same in all states of matter?

• physical change

• particle theory

• sublimation

• conservation of mass

what happens to the mass of a material during a change of state?

• it increases

• it decreases

• it stays the same

• it disappears

what is sublimation?

• gas turning to solid

• liquid turning to gas

• solid changing to a gas without becoming a liquid

• solid turning to liquid