"Exploring Combustion and Fire Extinguishing" Knowledge of Combustion PPT Courseware 3

Description

"Exploring Combustion and Fire Extinguishing" Knowledge of Combustion PPT Courseware 3

learning target

1.Knowledge and skills:

Use chemical science knowledge to explain some phenomena and causes of combustion and fire extinguishing in daily life.

2. Process and methods:

Through exploration activities on combustion conditions, fire extinguishing principles, etc., experience the process of scientific inquiry; improve the ability to evaluate, analyze and solve problems; and cultivate innovative spirit and practical ability.

3. Emotional attitudes and values:

Be able to scientifically understand the role of studying combustion and fire extinguishing on the development of human society, develop interest in learning in experiments, experience the process of scientific research, and develop scientific literacy. Stimulate the awareness of independent learning, mutual communication and cooperation.

Combustion has two sides.

(1) Energy utilization

(2) Fires caused by uncontrolled combustion bring disasters to human beings

(2) Ask questions and make guesses

List common examples of burning in daily life and explain why they burn? Then make bold guesses about the conditions required for combustion based on your own life experience and existing knowledge.

[Thinking about the problem]

(1) Why didn’t the white phosphorus in the cold water burn at the beginning?

(2) Why does the white phosphorus in hot water not burn before oxygen is introduced?

(3) After oxygen is introduced, why does the white phosphorus burn but the stones do not?

Definition of combustion: Combustion is a violent oxidation reaction of combustibles and oxygen that produces light and heat.

2. Principles and methods of fire extinguishing

1. Connect with life and think about problems

①How do you turn off the gas stove after cooking?

②The oil pan is on fire, how to put it out?

③How to put out a fire in a furniture factory?

2. Create scenes and experience them yourself

Use multiple burning candles to simulate a fire scene, and provide some fire-extinguishing materials (water, fine sand, wet rags, fans, etc.) to allow students to use their brains and develop rich associations. Then let the students go to the podium to demonstrate their own fire-fighting methods and explain their own fire-fighting principles.

3. Discuss and communicate and draw conclusions

①Remove flammable materials

Principles of fire extinguishing ②Isolate oxygen (or air)

③Reduce the temperature below the ignition point

(7) Class summary

1. Combustion conditions:

(1) The substance is flammable;

(2) Combustibles are in contact with air (or oxygen)

(3) The temperature reaches the ignition point of combustibles

2. Principle of fire extinguishing:

(1) Remove flammable materials;

(2) Isolate air (or oxygen)

(3) Reduce the temperature below the ignition point

(8) Homework arrangement

1. After class, search online for "the fire extinguishing principles and application scope of common fire extinguishers."

2. After class, find out what fire safety hazards exist in our school, and where should fire extinguishers be placed? What kind of fire extinguisher?

〖Knowledge Expansion〗

1. Why are thin wood strips easier to ignite than wood blocks for the same wood?

2. When you come to an unfamiliar place (such as a hotel, shopping mall, hotel), what should you pay attention to to prevent fire? In the event of a fire, what rescue measures should you take?

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For more information about the PPT courseware "The Knowledge of Combustion Exploring Combustion and Fire Extinguishing", please click the "The Knowledge of Combustion ppt Exploring Combustion and Fire Extinguishing" ppt tag.

"Exploring Combustion and Fire Extinguishing" PPT Courseware on Combustion 2:

"Exploring Combustion and Fire Extinguishing" PPT Courseware on Combustion 2 Preview 1. The definition of combustion. 2. Three conditions required for combustion. 3. Principles and methods of fire extinguishing. 1. Combustion definition: A violent oxidation reaction that produces light and heat between combustibles and oxygen. ..

"Exploring Combustion and Fire Extinguishing" PPT courseware on combustion knowledge:

"Exploring Combustion and Fire Extinguishing" Combustion Knowledge PPT Courseware Combustion: It is a violent chemical reaction that emits light and releases heat Note: 1 Combustion is an exothermic reaction 2 Chemical reactions Exothermic reaction Endothermic reaction Exothermic reaction: There are All chemical reactions that release heat...

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Update Time: 2024-10-02

This template belongs to Chemistry courseware Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 1 industry PPT template

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