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Authoritative PPT Summary
"Playing with Balloons" PPT Courseware 2
Where does the air that blows into the balloon come from?
Where is the air? Could you please look for it?
Catch the air with your hands!
You can't catch air with your hands, but how do you know there is air around you?
Have you seen the air?
Do you smell the air?
Group discussion: How to "catch" the air?
Materials: plastic bags, empty bottles, straight glasses, dry bricks, sponges or other easily available items.
Share and discover: Each group uses its own method to find air.
hidden air
Do it and see - put a dry sponge into water, what will you see?
Experiment: Put a balloon into a plastic bottle, put the balloon over the mouth of the bottle, tie it tightly, and blow up the balloon hard. What were the findings?
The balloon cannot be blown up
Why?
Because there is air in the bottle
Find a way to blow up the balloon in the bottle
Use a needle to poke holes in the bottle; use scissors to cut the bottle open.
fun games
Experiment 4: What happens when an empty cup is pressed vertically into water?
Water did not enter the cup
Experiment 5: Stuff the paper ball at the bottom of the cup, and then press the cup into the water. What happens?
The paper ball is not soaked by water
in conclusion
What did you understand through today's study?
Air exists everywhere around us. It is a colorless, odorless, tasteless, transparent, flowing gas that can occupy space.
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"Playing with Balloons" PPT courseware:
"Playing with Balloons" PPT courseware. Can you catch the air? Where is the air? Could you please look for it? Catch the air with your hands! You can't catch air with your hands, but how do you know there is air around you? Do you see the air? Group discussion: How to pack air? Material..