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Changing States Reading
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Questions in this quiz (3)
1What Are Changes of State?
The water droplets of fog form from water vapor in the air. Fog disappears when the water droplets change back to [blank_start]water vapor[blank_end]. These changes are examples of [blank_start]changes[blank_end] of [blank_start]state[blank_end]. A change of state occurs whenever matter [blank_start]changes[blank_end] from one state to another. Common states of matter on Earth are [blank_start]solid[blank_end], [blank_start]liquid[blank_end], and [blank_start]gas[blank_end]. Matter may change back and forth between any two of these states.
Changes of state are [blank_start]physical[blank_end] changes in matter. They are reversible changes that do [blank_start]not[blank_end] change matter’s [blank_start]chemical[blank_end] makeup or [blank_start]chemical[blank_end] properties. For example, when fog changes to [blank_start]water[blank_end] vapor, it is still water and can change back to [blank_start]liquid[blank_end] water again.- Awater vapor
- Bchanges
- Cstate
- Dchanges
- Esolid
- Fliquid
- Ggas
- Hphysical
- Ichemical
- Jnot
- Kchemical
- Lwater
- Mliquid
2Processes that Cause Changes of State
Several processes are involved in common changes of state. They include [blank_start]melting[blank_end], [blank_start]freezing[blank_end], [blank_start]sublimation[blank_end], [blank_start]deposition[blank_end], [blank_start]condensation[blank_end], and [blank_start]evaporation[blank_end]. The Figure below shows how matter changes in each of these processes.
Phase transitions between solid, liquid, and gas
[Figure 1]
Q: Which two processes result in matter changing to the solid state?
A: The processes are [blank_start]deposition[blank_end], in which matter changes from a gas to a solid, and [blank_start]freezing[blank_end], in which matter changes from a liquid to a solid.
- Amelting
- Bfreezing
- Csublimation
- Ddeposition
- Econdensation
- Fevaporation
- Gdeposition
- Hfreezing
3The Role of Energy in Changes of State
Suppose that you leave some squares of chocolate candy in the hot sun. A couple of hours later, you notice that the chocolate has turned into a puddle like the one pictured in the Figure below.
Q: What happened to the chocolate?
A: The chocolate [blank_start]melted[blank_end]. It changed from a solid to a liquid.
In order for solid chocolate to melt and change to a liquid, the particles of chocolate must [blank_start]gain[blank_end] energy. The chocolate pictured in the Figure above gained energy from [blank_start]sunlight[blank_end]. [blank_start]Energy[blank_end] is the ability to cause changes in matter, and it is always involved in [blank_start]changes[blank_end] of state. When matter changes from one state to another, it either [blank_start]absorbs[blank_end] energy—as when chocolate melts—or l[blank_start]oses[blank_end] energy. For example, if you were to place the melted chocolate in a refrigerator, it would [blank_start]lose[blank_end] energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a [blank_start]solid[blank_end] again.
Q: Why is energy always involved in changes of state?
A: The energy of particles of matter [blank_start]determines[blank_end] the matter's state. Particles of a [blank_start]gas[blank_end] have more energy than particles of a li[blank_start]quid[blank_end], and particles of a [blank_start]liquid[blank_end] have more energy than particles of a solid. Therefore, in order for matter to change from a solid to a liquid or from a liquid to a gas, particles of matter must [blank_start]absorb[blank_end] energy. In order for matter to change from a gas to a liquid or from a liquid to a solid, particles of matter must [blank_start]lose[blank_end] energy.
- Amelted
- Bgain
- Csunlight
- DEnergy
- Echanges
- Fabsorbs
- Goses
- Hlose
- Isolid
- Jdetermines
- Kgas
- Lquid
- Mliquid
- Nabsorb
- Olose
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- Quiz on Changing States Reading, created by Wallace Mason on 14/01/2019.
- Author
- Wallace Mason
- Language
- English
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