"Three State Changes of Water" PPT

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"Three State Changes of Water" PPT

Part One: The Form of Water

What forms does water take in nature? How do they change?

Cloud, fog, dew, frost, snow, ice

How do these water forms occur?

What conditions are required for their occurrence?

transformation

Cloud Small droplets of water vapor that condense on objects they come in contact with.

Fog is small water droplets formed by condensation of water vapor, floating in the low altitude.

Dew vapor is condensed into small water droplets that float high in the sky.

Frost is ice crystals formed by condensation of water vapor at low altitude below 0℃.

Snow is ice crystals formed by water vapor at high altitude being condensed and solidified below 0℃.

Ice is ice crystals formed by freezing and solidification of water when its temperature drops below 0°C.

"Three State Changes of Water" PPT, Part 2: Changes in the Form of Water

Now, we know:

Water can change from gaseous state to liquid state

For example: water vapor in the air condenses into clouds, fog, and dew.

Water can change from gaseous state to solid state

For example: water vapor in the air condenses into snow and frost.

Water can change from liquid to solid

For example: liquid water freezes into ice.

"Three State Changes of Water" PPT, the third part: water cycle

The water in the rivers flows into the ocean day and night, but the water in the ocean is never full or overflows. The water in the rivers never stops flowing. What is the reason for this?

Because the water in the ocean is constantly evaporating, the water vapor that evaporates into the air continues to fall down in the form of rain, snow, etc., and this cycle continues.

Therefore, the water in the rivers never runs out, and the water in the oceans never fills up or overflows.

Think about it and talk about it:

What did you learn in today’s lesson?

Any questions? Communicate with each other.

Keywords: Qingdao edition fourth grade science PPT courseware free download, three-state changes of water PPT download, .PPT format;

For more information about the PPT courseware "Three State Changes of Water", please click on the "Three State Changes of Water" PPT tab.

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"Three State Changes of Water" PPT courseware:

The first part of the "Three State Changes of Water" PPT courseware content: Changes in the form of water. The process of water form change and the conditions for change. Ice crystals formed when frost water vapor solidifies on objects. The temperature drops below 0°C. Ice crystals formed by water vapor at high altitudes in snow. The temperature drops below 0 ℃..

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Update Time: 2024-11-21

This template belongs to science courseware Qingdao Edition Fourth Grade Science Volume 1 industry PPT template

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