"Static Electricity Phenomena in Life" Electricity PPT Courseware 2

Description

"Static Electricity Phenomena in Life" Electricity PPT Courseware 2

science experiment

Experimental materials: plastic comb, scraps of paper, hair

Experimental steps:

1. Hold a plastic comb in your hand, close to the shredded paper, and observe the phenomenon.

2. Hold the plastic comb in your hand, close to the hair, and observe the phenomenon.

3. Put the comb that has just been used to comb your hair close to your hair and observe the phenomenon.

4. Run the comb through the hair a few times, then approach the scraps of paper and observe the phenomenon.

Static electricity can be seen everywhere in life.

Static electricity is present in everything around us, living and non-living things including humans.

Since static electricity exists in all materials, why don't we usually feel that objects are charged?

Exploration activity: Frictional electrification

Experimental Materials:

Paper scraps, glass rods, rubber rods, combs, rulers, balloons, silk, fur, etc.

Experimental suggestions:

1. Select any 2 objects and rub them quickly.

2. Use them to get close to the scraps of paper and observe the phenomenon.

3. Be careful not to touch the rubbed parts with your hands.

4. It is best to do each experiment 2-3 times.

For charges to flow to form an electric current, two conditions need to be met:

1. There must be power, that is, power supply;

2. There must be a circuit—current can only flow in a circuit.

Extracurricular extension:

1. Why does a tanker truck have a tail?

2. How does a lightning rod protect against lightning?

How to prevent and eliminate static electricity? The key is to maintain the humidity of the surrounding environment and minimize factors that can easily cause static electricity.

1. Maintain a certain humidity indoors. Mop the floor frequently in the room, sprinkle some water frequently, or use an air humidifier to increase the humidity.

2. Take a shower and change clothes frequently to eliminate static charges accumulated on the surface of the human body.

3. Wear less leather, wool and chemical fiber clothing. Especially the elderly should try to wear soft, smooth cotton or silk clothing.

4. Drink plenty of water, wash your face and hands frequently. If you find that your hair cannot be combed, soak the comb to eliminate static electricity before combing your hair.

5. After taking off your clothes and before touching metal objects, touch the wall with your hands to release static electricity from your body.

Classwork

1. Fill in the blanks

1. Static electricity exists in all substances. Substances have ( ) charges at the same time, which are ( ) charge and ( ) charge.

2. When combing dry hair with a plastic comb, the comb is charged (negatively) and the hair is charged (positively). When the comb and hair are close to each other, they will attract each other.

2. Multiple choice questions

1. Which of the following is an electrostatic phenomenon ( ).

A. Lightning during thunder B. Batteries used in flashlights

C. The snapping sound when taking off the sweater D. None of the above

2. When these two negatively charged balls approach each other, the phenomenon that occurs is ( )

A. Stay away from each other B. Get closer to each other C. Stay away first and then get closer D. Get closer first and then move away

3. Two small balls are tied to a small wooden ruler with cotton thread, and they attract each other. From this experimental phenomenon, it can be seen that the charge carried by the two small balls is ( )

A. Same type of charge B. Different type of charge C. It may be the same type of charge or it may be different type of charge.

4. If you use two other small balls to do the experiment using the method in the above question, mutual repulsion occurs. From this, we can know the charges carried by the two small balls ( )

A. Same type of charge B. Different type of charge C. It may be the same type of charge or it may be different type of charge

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For more information about the PPT courseware "Static Electricity Phenomena in Electrical Life", please click the "Static Electricity Phenomena in Electrical Life" ppt tag.

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Update Time: 2024-11-13

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

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