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Authoritative PPT Summary
"Condensation" PPT
Part One: Condensation Phenomenon
What did you see?
Can you explain where the water droplets outside the cup come from?
A glass filled with ice is placed in the air. After a while, many small water droplets appear on the outside of the glass.
Warm tips
1. During the experiment, pay attention to putting the two porcelain plates up and down at the same time.
2. Pay attention to safety when experimenting.
3. After the experiment, organize the experiment report in time and pack away the experimental instruments.
Part 2 content: Definition of condensation
What is "condensation"?
When the air temperature decreases, the amount of water vapor that can be held in the air decreases, and some water vapor will turn into small water droplets. This process is called condensation of water. For example
Small water droplets appear on the lenses of glasses placed in the bathroom after taking a hot bath
Water vapor condenses into water at high altitudes
After taking the fruit out of the refrigerator and leaving it for a while, there will be small water droplets on the surface.
Now, can you explain where the water droplets outside the cup come from?
The water vapor in the air will condense into small water droplets on the wall of the glass when it encounters the colder glass.
Part 3: Picking up clams in Zhuhai
1. The change of water from gaseous state to liquid state is called ( )
A. Evaporation B. Boiling C. Condensation
2. The "white gas" that comes out when water is boiled is ( )
A. Water vapor B. Small water points formed by condensation of water vapor.
3. Students who wear glasses in winter will find that their lenses are blurred when they enter a warm room from outside. The reason is ( ).
A. There is dust on the lens. B. Water vapor in the indoor air condenses into water when it encounters cold lenses, making the lenses blurry.
Part Four: Expanding Applications
When boiling water, is the "white gas" coming out of the spout water vapor? Why?
I am a little scientist
In winter, there are often small water droplets on the inner wall of the car glass, which affects the driver's vision. We try to prevent their appearance.
Keywords: Free download of Qingdao version of fourth grade science PPT courseware, first volume, condensed PPT download, .PPT format;
For more information about the "Condensation" PPT courseware, please click the Condensation PPT tab.
"Condensation" PPT download:
"Condensation" PPT Download Part One: Warm Tips 1. During the experiment, pay attention to putting up and putting down the two glass pieces at the same time. 2. During experiments, division of labor and cooperation are required and safety must be paid attention to. 3. After the experiment, organize the experiment report in time and pack away the practical...
"Condensation" PPT courseware:
"Condensation" PPT courseware Part 1: Classroom activities Activity 1: Condensation phenomenon in life What is condensation? Water vapor _______ turns into liquid water, a phenomenon called condensation. After taking a hot bath, small water droplets appeared on the lenses of the glasses placed in the bathroom. The air conditioner...