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2. 关于物态变化,下列说法正确的是( )

C. 雾的形成,属于汽化现象
C. 雾的形成,属于汽化现象
D. 霜的形成,属于凝华现象
D. 霜的形成,属于凝华现象

3. 下列现象中属于蒸发的是( )

A. 铁块变成铁水
B. 夏天从冰箱拿出的苹果“冒汗”
C. 霜的形成
D. 把酒精擦在手背上,一会儿不见了

4. 下列做法能使水的蒸发加快的是( )

A. 用电热吹风机将湿头发吹干
B. 用扫帚把地面的积水向周围扫开
C. 把粮食拿到向阳的地方晒
D. 把水果用保鲜膜包好放在冷藏柜里

5. (2012·广州)下表为不同气压下水的沸点

P/\times 10^5\text{Pa} 0.98 1.01 1.13 1.29 1.48 1.69 1.80 2.05
t/^{\circ}\text{C} 99 100 103 107 111 115 117 121

压力锅工作时锅内气体压强最大可达 1.80\times 10^5\text{Pa} ,锅内水的最高温度( )

A. 可达 100^{\circ}\text{C}
B. 可达 117^{\circ}\text{C}
C. 可达 121^{\circ}\text{C}
D. 取决于加热时间

6. (2012·德州)祖国的山河一年四季美景如画,如图中的描述属于液化的是( )

Image showing melting snow and ice in a river or stream.
Image showing melting snow and ice in a river or stream.

A. 春天,冰雪融化

Image showing dew drops on grass leaves.
Image showing dew drops on grass leaves.

B. 夏天,草叶上形成露珠

Image showing frost covering tree branches.
Image showing frost covering tree branches.

C. 秋天,枝头挂满白霜

Image showing an ice sculpture melting.
Image showing an ice sculpture melting.

D. 冬天,冰雕逐渐变小

7. 如图所示,正确反映“探究水的沸腾”过程中温度随时间变化关系是( )

Graph A: Temperature vs Time. Temperature increases from 0, plateaus, then increases again.

A. 0

\text{温度} t/^{\circ}\text{C}

\text{时间} t/\text{min}

Graph A: Temperature vs Time. Temperature increases from 0, plateaus, then increases again.
Graph B: Temperature vs Time. Temperature increases from above 0, plateaus horizontally (boiling), then increases again.

B. 0

\text{温度} t/^{\circ}\text{C}

\text{时间} t/\text{min}

Graph B: Temperature vs Time. Temperature increases from above 0, plateaus horizontally (boiling), then increases again.
Graph C: Temperature vs Time. Temperature decreases linearly, then plateaus at a constant temperature (freezing/solidification).

C. 0

\text{温度} t/^{\circ}\text{C}

\text{时间} t/\text{min}

Graph C: Temperature vs Time. Temperature decreases linearly, then plateaus at a constant temperature (freezing/solidification).
Graph D: Temperature vs Time. Temperature decreases smoothly.

D. 0

\text{温度} t/^{\circ}\text{C}

\text{时间} t/\text{min}

Graph D: Temperature vs Time. Temperature decreases smoothly.

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