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6th Science Ch 3 *2
6th grade Science Chapter 3 test review
| Question | Answer |
|---|---|
| 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 |