"Does Air Take Up Space?" Water and Air PPT Courseware

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"Does Air Take Up Space?" Water and Air PPT Courseware

Do you also know which objects in life can take up space?

Activity 1: Stuff a ball of paper into the bottom of a cup, then place the cup upside down and plunge it into the water. Predict whether the ball of paper will be wet? Why?

Activity 2 How to make water flow out of a straw?

Require:

1. Do not tilt the cup

2. Can’t press the cup

3. Do not suck with mouth

think about it

There is some water in the bottle. Can you use the knowledge you learned today (air) to squeeze the water out of the bottle?

Experimental materials: plasticine, straws, bottles

Let’s discuss it first.

Think about it: ①What is the use of plasticine? ②How do you get air into the bottle? ③How do you use air to squeeze water?

Experimental key:

The volumes of water and air pumped in should be the same (10 ml).

The force pushing or pulling the piston should be the same.

The readings of the scale on the surface of the syringe before and after pushing and pulling should be recorded in time.

What new properties of air have we learned in this lesson?

1. Air can also take up space.

2. How much space the air takes up can be changed.

3. Compressed air is elastic and will produce elastic force.

Classwork:

Distinguish between right and wrong

1. The reason why the candle can continue to burn under the water is because the air occupies the space ( )

2. The watering can used to spray potions on plants utilizes the principle of elasticity of compressed air ( )

Carefully selected

1. Blowing air into the balloon will make the balloon bigger and bigger, which means that the air... ()

A. Has weight B. Takes up space C. Does not have a certain volume

2. The reason why the paper towel at the bottom of the cup in the picture on the right will not get wet is... ( )

A. Air takes up space B. Paper presses water down C. Water has a certain volume

Operation:

1) There are many examples of air occupying space in life. Please collect and record them. Report in the next class.

2) Where else in life are the compressible properties of air used? Please note it down and share it with your classmates next class.

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For more information about the PPT courseware "Water and Air Does Air Take Up Space?", please click the Water and Air ppt Does Air Take Up Space ppt tag.

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Update Time: 2024-11-22

This template belongs to science courseware Third Grade Science Volume 1, Textbook Edition industry PPT template

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