The Kinetic Molecular Theory assumes that gas particles: a) Have strong attractions b) Are in constant random motion c) Do not collide d) Are motionless at room temperature

A sealed balloon filled with helium expands when placed in the sun. Which statement best explains this? a) Helium atoms gain energy and move faster, increasing pressure inside the balloon b) Helium atoms lose energy and move slower, decreas

Dry ice turns directly into carbon dioxide gas at room temperature. This is an example of: a) Deposition b) Sublimation c) Condensation d) Melting

The particles in a gas: a) Are close together and move slowly b) Are far apart and move rapidly c) Vibrate in place d) Stay fixed

When a solid changes to a liquid, the particles: a) Slow down and come closer b) Gain energy and move more freely c) Lose energy and become fixed d) Stop vibrating

Which change of state requires heat to be absorbed? a) Freezing b) Condensation c) Melting d) Deposition

The particles in a liquid: a) Do not move b) Vibrate in fixed positions c) Slide past each other closely d) Are far apart and move fast

The process of a solid changing directly to a gas is called: a) Condensation b) Sublimation c) Freezing d) Melting

On a cold morning, droplets form on the outside of a cold drink can. What change of state does this show? a) Evaporation — gas to liquid b) Condensation — gas to liquid c) Deposition — gas to solid d) Melting — solid to liquid

According to the Kinetic Molecular Theory, pressure increases when gas is heated because: a) The particles get larger b) The container expands c) Particles move faster and hit the walls more often d) The number of particles increases

hich state of matter has neither definite shape nor volume? a) Solid b) Liquid c) Gas d) Plasma

Sublimation occurs because particles: a) Gain enough energy to break free from solid forces b) Lose energy and vibrate slower c) Stay in place d) Move closer together