| Category | Format | Size |
|---|---|---|
| E-education edition sixth grade science volume 1 | pptx | 6 MB |
"Water Frozen" PPT courseware on changes in the four seasons
Description
"Water Frozen" PPT courseware on changes in the four seasons
Do you know 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.
ice
Have you ever seen ice? Under what circumstances does water turn into ice?
Take a guess
In winter, the weather is cold and freezing occurs in many places. At what temperature does water freeze?
water freezing experiment
(1) Take about half a test tube of water, measure its temperature, and record it.
(2) Take a plastic cup (wrap a dry towel outside), fill the cup with crushed ice, insert the test tube into the crushed ice; continue to measure and record the water temperature in the test tube.
(3) Add a lot of salt to the crushed ice (adding salt can create a lower temperature), keep it for a few minutes, record and observe the changes in water temperature in the test tube
(4) If you observe that the water in the test tube begins to freeze, read the thermometer and continue to observe the reading of the thermometer until all the water freezes.
think
1. At what temperature does water freeze?
(Water will freeze at 0℃)
2. What causes the state of water to change?
(Changes in temperature cause changes in water)
3. What happens in the volume of water when it turns into ice?
(The volume has become larger)
Experimental steps:
1. Fill a cup with a dark outer wall with some ice, then sprinkle some salt and mix with the ice.
2. Use a thermometer to measure the temperature of the ice-salt mixture in the cup.
3. Observe what happens on the outer wall of the cup.
What other phenomena have we seen related to changes in the state of ice?
Where did the ice on the clothes go after they dried?
It turns into water vapor and disperses into the air.
Notice
1. Water vapor is water in a gaseous state. Water vapor is a colorless and transparent gas that we cannot see. The white substance that emerges when boiling water is not water vapor, but "water vapor".
2. Water vapor is composed of small droplets formed when water vapor is cooled, so white water vapor is liquid water, not gaseous.
expand
1. We have learned about the three states of water. Can you use the knowledge you have learned to explain how snow is formed?
2. Regarding the three-state changes of water, what other issues do you want to study?
Operation:
Go home and make a piece of ice, observe it again, and see what new discoveries you make!
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For more information about the PPT courseware "Water Frozen and Changes in Four Seasons", please click the "Water Frozen and Changes in Four Seasons" 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...
File Info
Update Time: 2024-07-04
This template belongs to science courseware E-education edition sixth grade science volume 1 industry PPT template
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