"Combustion and Fire Extinguishing" Changes in Matter PPT Courseware 2

Description

"Combustion and Fire Extinguishing" Changes in Matter PPT Courseware 2

Activity 1 Combustion of matter

Where is combustion used in daily life?

Burnable substances Examples of utilization

Liquefied petroleum gas for cooking and cooking

Wood, leaves, boiling water, heating

candle lighting

Substances that can burn are called combustibles. Combustibles are the primary condition for combustion.

Activity 2 Reasons for extinguishing

Cover one of the burning candles with a beaker and describe in your own words what happened? What does it mean?

Experimental phenomena

The candle exposed in the air kept burning, while the flame of the candle in the beaker gradually became smaller and finally went out.

in conclusion

Candles will not burn without oxygen. Combustion requires oxygen.

Expand to make charcoal burn more vigorously

In order to make the charcoal stove burn more vigorously, what aspects should be considered?

① Increase the concentration of oxygen

② Increase the contact area between combustibles and oxygen

discuss

How to put out a fire

1. Remove other oil drums

2. Disconnect the power and cover with sand

3. Use a fire extinguisher

4. Use water to extinguish fire

【Daily life】

1. If the oil in the pot catches fire while cooking, how to put out the fire?

Cover the pot with a lid to seal out air and extinguish the fire.

2. If the alcohol lamp is accidentally knocked over and the alcohol burns on the table, how should you put out the fire?

Use a wet rag to cover the combustibles. This will keep the air out of the combustibles and allow the water to absorb heat and lower the temperature of the combustibles.

3． One of the most effective ways to put out forest fires is to cut down a patch of trees in front of the fire's path. Do you know why?

Remove flammable materials.

Keywords: Changes of Matter teaching courseware, Combustion and Fire Extinguishing teaching courseware, People's Education Edition fifth grade science PPT courseware download volume 2, Fifth grade science slide courseware download, Changes of Matter PPT courseware download, Combustion and Fire Extinguishing PPT courseware download,. PPT format;

For more information about the "Changes of Substances in Combustion and Fire-Extinguishing" PPT courseware, please click the Changes in Substances in Combustion and Fire-Extinguishing PPT PPT tab.

"Combustion and Fire Extinguishing" Combustion and Fuel PPT:

"Combustion and Fire Extinguishing" Combustion and Fuel PPT, 34 pages in total. 1. Principle of fire extinguishing Things we often do in our daily life, such as blowing out candles, extinguishing alcohol lamps, and turning off the fire of gas stoves, are fire extinguishing. Find a way to extinguish the fire. Blow out the candle flame and let the air flow carry away the candle..

"Combustion and Fire Extinguishing" Combustion and Fuel PPT (Lesson 2):

"Combustion and Fire Extinguishing" Combustion and Fuel PPT (Lesson 2), 26 pages in total. New knowledge learning Knowledge point 1 Methods to promote combustion Incomplete combustion and complete combustion of acetylene (1) The acetylene gas is led out through a glass tube and ignited in the air. The acetylene _________ burns to produce...

"Combustion and Fire Extinguishing" Combustion and Fuel PPT (Lesson 1):

"Combustion and Fire Extinguishing" Combustion and Fuel PPT (Lesson 1), 20 pages in total. New Knowledge Learning Knowledge Point 1 Find ways to extinguish fires Interactive exploration Exploration Point 1 Principles of extinguishing fires [Problem Exploration] Light three candles, put a beaker on one of the candles; put the other two...

File Info

Update Time: 2024-10-19

This template belongs to science courseware People's Education Press Fifth Grade Science Volume 2 industry PPT template

Preview