"Water Frozen" PPT Courseware 2 on Changes in Temperature and Water

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Third Grade Science Volume 2, Textbook Edition	pptx	6 MB

"Water Frozen" PPT Courseware 2 on Changes in Temperature and Water

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Upload Time: 2024-11-22

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"Water Frozen" PPT Courseware 2 on Changes in Temperature and Water

The cold winter has just passed. I wonder if you have noticed what changes have happened to the water around us during the cold winter?

ice observation

What color is ice?

Can you see other objects through the ice?

Do ice cubes have a fixed shape?

Ice is colorless.

You can see that the ice is transparent.

Ice has a fixed shape

Characteristics of ice

Relatively hard, very smooth, low temperature, easy to melt, ice cubes will float on water, ice is solid

Characteristics of water

A liquid that flows and has no fixed shape

Experiment as follows:

1. Put ice cubes in the cup and measure the temperature of the ice

2. Add table salt into the cup and measure the temperature after the ice and salt are mixed.

3. Insert a test tube containing a small amount of water into the ice and salt mixture. When ice appears in the test tube, measure the temperature in the test tube.

Report and exchange:

1. At what temperature does water freeze?

Answer: Water will freeze at 0℃ and change from liquid to solid.

2. What caused the state of water to change?

Answer: Changes in temperature cause the state of water to change.

judge

1. As long as winter comes, ice can be seen everywhere. ( )

2. During the freezing process, water releases heat to the surroundings. ( )

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For more information about the PPT courseware "Changes in Temperature and Water - Water Freezes", please click on the "Changes in Temperature and Water - Water Freezes" ppt tag.

"Water Frozen" PPT download of changes in temperature and water:

"Water Frozen" PPT Download of Changes in Temperature and Water Part One: Introduction of New Knowledge Do you want to know what is in this bag? Come on stage, touch it and tell me how you guessed it? ... ... ... Water freezes PPT, part 2: new knowledge explained...

"Water Frozen" Changes in Temperature and Water PPT:

"Water Frozen" PPT on Changes in Temperature and Water Part One: Observation of Ice Take some ice cubes and observe them carefully. What color is ice? Can you see other objects through the ice? Do ice cubes have a fixed shape? How does it feel when you touch an ice cube with your hand? ... ..

"Water Frozen" PPT Courseware 2 on Changes in the Four Seasons:

"Water Frozen" Changes in the Four Seasons PPT Courseware 2 Do you understand water? Think about it, what does water look like in daily life? Please describe the characteristics of water from some of the following aspects. The color, smell, taste, state of water, etc. What are the characteristics of water? colorless no...

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Update Time: 2024-11-22

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"Water Frozen" PPT Courseware 2 on Changes in Temperature and Water