"Changes of Water" PPT courseware on changes in matter

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"Changes of Water" PPT courseware on changes in matter

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

frost ice snow

dew cloud fog

transformation

Water vapor condenses into small water droplets on the objects it comes into contact with.

Small water droplets formed by condensation of water vapor float in the low altitude.

Small water droplets formed by condensation of water vapor float high in the sky.

Water vapor at low altitude condenses into ice crystals when it is cooled below 0°C.

Ice crystals form when water vapor at high altitude condenses and solidifies below 0°C.

Ice crystals form when water cools and solidifies when its temperature drops below 0°C.

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.

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?

Can you provide your own explanation?

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 say it:

What did you learn in today’s lesson?

Any questions? Communicate with each other.

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For more information about the PPT courseware "Changes in Matter and Changes in Water", please click on the Changes in Matter ppt and Changes in Water ppt tags.

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Update Time: 2024-10-19

This template belongs to science courseware People's Education Press Fifth Grade Science Volume 2 industry PPT template

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