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# 6th Science Ch 3 *2

### 6th grade Science Chapter 3 test review

Particles of a Solid Do not move fast enough to overcome strong attraction between them. So they are close together and vibrate in place
Particles of a Liquid Move fast enough to overcome some of the attraction between them. The particles are close together but can slide past one another. (Take the shape of the container)
Particles of a Gas Move fast enough to overcome almost all of the attraction between them. The particle are far apart and move independently of one another.
The particles of a substance in a solid state are Very close together, each particle is locked in place by the particles around it.
The particles of a substance in a liquid state can Change shape but they do not easily change volume.
The particles of a substance in a gas state can Spread out and the amount of empty space between particles can change.
How does Boyle's Law differ from Charles's Law? Gas at a constant temperature and the volume of the gas are inversely related, so one goes up and the other goes down.
What causes a change in state? Adding or removing energy
How is evaporation different than boiling? Evaporation takes place as all temperatures while boiling occurs at a specific temperature. Evaporation takes place at the surface whereas the entire liquid boiling
How does the motion and arrangement of particles in water differ when changing states? (how does it change from a solid to a liquid) Adding energy to the solid increase the temperature. As the temperature increases, the particle of the solid move faster. When a certain temperate is reached, the solid will melt.
How does energy differ in a solid, liquid and a gas? Particles in a liquid water have more energy than particles in ice. But particles of steam have more energy than particles in liquid water. So to change a substance from one state to another you must add or remove energy.
Freezing is the reverse process of Melting
Liquid water freezes at the same temperature at which Ice Melts
Boiling As energy is added to the liquid, particle throughout the liquid move faster. When they move fast enough they break away from other particles, they evaporate and become a gas.
Evaporation Some particle at the surface of the liquid move fast enough to break away from the particles around them and become a gas.
Energy is added during Endothermic changes
Energy is removed during Exothermic changes
The freezing point and the melting point of a substance Are at the same temperature
Both boiling and evaporation result in A liquid changing to a gas
Condensation is the change of a gas to a Liquid
Evaporation is the change of a liquid to a Gas
The process to change a solid directly to a gas Sublimation
The temperature of a substance does not change during a Change in State
What is the reverse of condensation? Evaporation
Boyle's Law describes the relationship between Volume and Temperature
What are the effects of a warm temperature on gas particles? The volume of the gas increases (because the particles move more quickly)
When energy is removed, the particle movement Slows down
Created by: RoperFive