"Three State Changes of Water" Water Cycle in Nature PPT Courseware

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"Three State Changes of Water" Water Cycle in Nature PPT Courseware

What are the three forms of water in nature, and how do they change?

At what point does water start to freeze?

The temperature at which water freezes is the freezing point of water.

At one atmospheric pressure, the freezing point of water is 0°C.

In the cold winter, the clothes hanging in the yard will freeze quickly, but the ice does not turn into water, but the clothes dry. How is this going?

How do people use the three-state changes of water in life?

Fish freezing and preservation, sun salting, steaming steamed buns, artificial rainfall

The earth's north and south poles are covered with thick ice. At present, the temperature of the earth is gradually rising, which is accelerating the melting of ice and snow in the North and South Poles and raising sea levels. If this phenomenon continues, what will be the consequences?

Some coastal areas will be flooded, and penguins, polar bears and other polar animals will lose their homes, die or even become extinct.

1. Fill in:

1. The temperature of water when it freezes is the ____ of the water.

2. It takes ____ for ice to turn into water or water vapor.

3. Water has three states: liquid, gas, and solid. Ice is ____ state of water. Water vapor is water in the ____ state.

4. The main factor affecting the changes in the three states of water is ______________.

2. Be a good little judge:

(1) The three states of liquid, gaseous and solid water can transform into each other under certain conditions. ( )

(2) Water vapor can directly turn into ice, but ice cannot directly turn into water vapor. ( )

(3) Put a piece of ice there and it will never decrease as long as it does not turn into water. ( )

(4) Under normal circumstances, water can freeze at 0°C and below. ( )

(5) The three-state changes of water are very closely related to our lives. ( )

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For more information about the PPT courseware "Three-State Changes of Water and the Water Cycle in Nature", please click on the "Three-State Changes of Water ppt Water Cycle in Nature" ppt tag.

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Update Time: 2024-09-08

This template belongs to science courseware People's Education Press Sixth Grade Science Volume 1 industry PPT template

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