Class 8 Combustion and Flame Part 2

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Slide 1: Tekstslide

In deze les zitten 11 slides, met tekstslides en 1 video.

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Slide 1 - Tekstslide

Slide 2 - Video

Any doubts during the class can be posted in the space given by clicking on the Doubts Icon in the right bottom corner.

Slide 3 - Tekstslide

Red for working in total silence, no questions may be asked; orange if questions may be asked to the teacher or with each other; green is for normal discussion and collaboration.
Points To Note:
Timer is used for activities and must be completed within the given time.

Slide 4 - Tekstslide

1. Assuming stable fuel, heat, and oxygen levels, a typical house fire will double in size every minute.
2. During wildfires, trees can explode if water deep inside the tree quickly turns to steam.
3. No one knows who invented the fire hydrant, because its patent was destroyed in a fire in 1836.
4. You can start a fire using ice.
5. Once a forest fire begins, it can spread at a rate of up to 25 kilometres per hour, consuming everything in its path.

Slide 5 - Tekstslide

Slide 6 - Tekstslide

Today's Lesson
  • Explain the different regions of flame.
  • Describe fuel and its types
  • State the characteristics of an ideal fuels. 
  • Understand that burning fuels leads to harmful products.

Slide 7 - Tekstslide

Slide 8 - Tekstslide

Slide 9 - Tekstslide

What you have learnt today?
  1. The substances which burn in air are called combustible.
  2. Oxygen (in air) is essential for combustion.
  3. During the process of combustion, heat and light are given out.
  4. Ignition temperature is the lowest temperature at which a combustible substance catches fire.
  5. Inflammable substances have very low ignition temperature.
  6. Fire can be controlled by removing one or more requirements essential for producing fire.
  7. Water is commonly used to control fires.
  8. Water cannot be used to control fires involving electrical equipment or oils.
  9. There are various types of combustions such as rapid combustion, spontaneous combustion, explosion, etc

Slide 10 - Tekstslide

Thank You
For your attention!
Presented by Anshika

Slide 11 - Tekstslide