"Water Frozen" Changes in Temperature and Water PPT

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"Water Frozen" Changes in Temperature and Water PPT

Part One: Observation of Ice

Get some ice cubes and watch 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 freezes PPT, part 2: At what temperature does water freeze?

Add half of the purified water to the test tube and use a thermometer to measure and record the temperature of the water in the test tube.

Take a thermos cup (or wrap a dry towel around an ordinary plastic cup), fill the cup with crushed ice, and insert the test tube into the crushed ice. Use a thermometer to observe changes in the temperature of the water in the test tube.

Add more salt to the crushed ice (adding salt can create a lower temperature), keep it for a few minutes and observe the water temperature in the test tube.

When the water in the test tube begins to freeze, read the thermometer.

Communicate what we observe.

When the ambient temperature is lower than 0°C and the temperature of water drops to 0°C, it begins to freeze and changes from a liquid state to a solid state.

Changes in temperature cause changes in the state of water.

During the freezing process, water releases heat to its surroundings.

Keywords: Free download of Chinese PPT courseware for the second volume of the third grade of the textbook version, PPT download of water freezing, PPT download of changes in temperature and water, .PPT format;

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.

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Update Time: 2024-11-03

This template belongs to science courseware Third Grade Science Volume 2, Textbook Edition industry PPT template

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