"Conditions of Combustion" Fuel and its Utilization PPT Courseware 3

Description

"Conditions of Combustion" Fuel and its Utilization PPT Courseware 3

Teaching background

The exploration of combustion conditions is to have an in-depth understanding of the "combustion and fire extinguishing" that we have learned before, and to master the three conditions necessary for combustion.

It plays a paving role for high school students and those who will learn "Energy Changes in Chemical Reactions", and is a bridge that gradually transforms knowledge into abilities.

Knowledge and skills

Deepen your understanding of combustion conditions and further understand the principles of fire extinguishing;

Process and Method

Experience the process of experimental inquiry; initially learn to use comparative thinking to design inquiry experiments; cultivate students' experimental innovation ability.

Emotions, attitudes, values

1. Cultivate students’ scientific inquiry spirit and group cooperation awareness.

2. Enhance awareness of fire prevention and fire extinguishing through exploration of combustion conditions.

1. Demonstration and research

Dip cotton in alcohol and water respectively, place it on the flame of an alcohol lamp and heat it for a while to observe the phenomenon.

One of the combustion conditions: combustible materials

2. Guided inquiry

[Experiment 1] Use crucible pliers to hold a small piece of table tennis and filter paper respectively and burn them on the flame of the alcohol lamp to observe the phenomenon.

[Experiment 2] Place a thin copper sheet on the tripod, place two different combustibles selected by the students themselves, and light the alcohol lamp to heat, observe the phenomenon, and verify the conclusion.

3. Independent exploration

[Experimental Guide] Use candles and beakers (or choose other supplies) to design an experiment to illustrate one of the conditions for combustion: the need for oxygen (or air).

Combustion condition three: oxygen (or air)

4. Innovative Experiments

[Ask a question] Can you design the following experiments and explain them: boiling water in a paper box, making a fire in the water, burning gauze, "qigong" burning cotton, etc.

[Experimental Guidance] Divide students into four large groups in advance. Each large group will receive a task and then be divided into small groups to implement it.

5. Questions and exchanges

1. In the above experimental step 1, what will happen if the heating time on the alcohol lamp is longer? Can you explain why?

2. What will happen if the table tennis fragments and filter paper in Experiment Step 2 (2) are replaced with wood chips and coal powder for the experiment? What does it mean?

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For more information about the "Conditions of Combustion Fuels and Their Utilization" PPT courseware, please click the "Conditions of Combustion ppt Fuels and their Utilization ppt" tag.

"Conditions of Combustion" PPT courseware 3:

"Conditions of Combustion" PPT Courseware 3 Question 1: What is combustion? Combustion is usually a violent oxidation reaction between combustibles and oxygen that produces light and heat. Question 2: What are the conditions for combustion? 1. There must be combustible materials; 2. It must be in contact with oxygen (or air)..

"Conditions of Combustion" PPT Courseware 2:

"Conditions of Combustion" PPT courseware 2 Activity 1: Guess the conditions of combustion 1. Requirements: ① Please use the supplies provided below to extinguish 4 candles in different ways, and record the methods used in the group experiment record sheet. ②Analyze the main reason why the candle went out and guess what...

"Conditions of Combustion" PPT courseware:

"Conditions of Combustion" PPT courseware What are the conditions of combustion? 1. There must be combustible materials; 2. It must be in contact with oxygen (or air); 3. The temperature reaches the ignition point of combustible materials. Experimental goals 1. Understand the conditions of combustion; 2. In the process of exploring the combustion conditions of substances..

File Info

Update Time: 2024-11-19

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 1 industry PPT template

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