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Concept Maps
Combustion and Flame — Concept Maps
Gujarat Board · Class 8 · Science
3 concept maps of Combustion and Flame for Gujarat Board Class 8 Science, each also written out as a text outline.
45 questions5 concepts
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3 Concept Maps
Combustion and Flame – Chapter Overview Mind Map
The map in words
- Combustion and Flame
- Combustion
- Definition
- Fuel reacts with Oxygen
- Produces Heat and Light
- Conditions Needed
- Combustible Fuel
- Oxygen from Air
- Ignition Temperature
- Types of Substances
- Combustible
- Wood Coal LPG
- Non-Combustible
- Stone Glass Iron
- Combustible
- Definition
- Ignition Temperature
- Minimum temp to catch fire
- Inflammable Substances
- Very low ignition temp
- Petrol Alcohol LPG
- Matchstick Science
- Friction generates heat
- Raises temp above ignition point
- Types of Combustion
- Rapid Combustion
- Needs external heat
- Example LPG stove
- Spontaneous Combustion
- No external heat needed
- Example Phosphorus
- Coal mine fires
- Explosion
- Sudden violent reaction
- Heat Light Sound Gas
- Example Crackers
- Rapid Combustion
- Controlling Fire
- Fire Triangle
- Fuel
- Oxygen
- Heat
- Water
- Cools below ignition temp
- NOT for oil or electrical fires
- Carbon Dioxide CO2
- Blanket over fire
- Best for electrical fires
- Does not conduct electricity
- Fire Triangle
- Structure of Flame
- Dark Inner Zone
- Lowest temperature
- Unburnt vapours
- Luminous Middle Zone
- Yellow colour
- Unburnt carbon particles
- Moderate temperature
- Non-Luminous Outer Zone
- Blue colour
- Highest temperature
- Complete combustion
- Goldsmith uses this zone
- Dark Inner Zone
- Fuels and Calorific Value
- Unit kJ per kg
- Hydrogen 150000
- LPG 55000
- Petrol Kerosene Diesel 45000
- Coal 25000 to 33000
- Wood 17000 to 22000
- Cow Dung 6000 to 8000
- Ideal Fuel Properties
- Cheap and available
- High calorific value
- No pollution
- Environmental Harm
- Unburnt Carbon
- Respiratory diseases
- Asthma
- Carbon Monoxide CO
- Incomplete combustion
- Poisonous gas
- Carbon Dioxide CO2
- Global Warming
- Glacier melting
- Sea level rise
- Acid Rain
- SO2 from coal and diesel
- NOx from petrol engines
- Harms crops buildings soil
- Unburnt Carbon
- Combustion
Combustion and Flame Concept Overview
The map in words
- Combustion and Flame
- Combustion
- Definition
- Chemical reaction
- With oxygen
- Produces heat light
- Requirements
- Fuel
- Oxygen
- Heat
- Types
- Rapid combustion
- Spontaneous combustion
- Explosion
- Ignition Temperature
- Lowest temperature
- Material catches fire
- Different for each
- Definition
- Flame
- Structure
- Dark zone
- Luminous zone
- Non-luminous zone
- Formation
- Vaporization
- Only gaseous fuels
- Temperature
- Increases inward
- Hottest center zone
- Structure
- Fire Control
- Three methods
- Remove fuel
- Cut air supply
- Cool fuel
- Extinguishers
- Water
- CO2
- Dry powder
- When to use
- Wood paper fires
- Oil fires
- Electrical fires
- Three methods
- Fuels
- Types
- Solid fuels
- Liquid fuels
- Gaseous fuels
- Properties
- Calorific value
- Cost efficiency
- Ease of use
- Ideal fuel
- Readily available
- Cheap
- High heat output
- Non-polluting
- Types
- Environment
- Harmful effects
- CO2 global warming
- CO poisoning
- SO2 acid rain
- Unburnt carbon
- Deforestation
- From wood use
- Lose tree benefits
- Ecosystem damage
- Harmful effects
- Combustion
Combustion and Flame — Complete Chapter Overview
The map in words
- Combustion and Flame
- Combustion
- Chemical reaction with oxygen
- Produces heat and light
- Combustible substances
- Non-combustible substances
- Three requirements
- Fuel
- Oxygen
- Heat above ignition temp
- Ignition Temperature
- Lowest temp to catch fire
- Different for each substance
- Inflammable substances
- Very low ignition temp
- Petrol
- Alcohol
- LPG
- Types of Combustion
- Rapid Combustion
- Burns fast with heat and light
- LPG stove
- Spontaneous Combustion
- No external heat needed
- Phosphorus
- Coal dust
- Explosion
- Sudden violent reaction
- Heat light sound gas
- Firecrackers
- Rapid Combustion
- Fire Control
- Remove fuel
- Remove oxygen
- Reduce temperature
- Water
- Cools below ignition temp
- Not for electrical fires
- Not for oil fires
- CO2 extinguisher
- Best for electrical fires
- Best for oil fires
- Heavier than oxygen
- Flame Structure
- Dark Zone
- Innermost
- Coolest
- Unburnt vapours
- Luminous Zone
- Middle
- Yellow
- Unburnt carbon
- Non-luminous Zone
- Outermost
- Blue
- Hottest
- Complete combustion
- Dark Zone
- Fuels
- Solid Fuels
- Wood Coal Charcoal
- Liquid Fuels
- Petrol Kerosene Diesel
- Gaseous Fuels
- LPG CNG Natural gas
- Calorific Value
- Heat per kg of fuel
- Unit kJ per kg
- Hydrogen highest 150000
- Solid Fuels
- Harmful Effects
- Carbon particles
- Respiratory diseases
- Carbon monoxide
- Poisonous gas
- Carbon dioxide
- Global warming
- Sulphur dioxide and NOx
- Acid rain
- Deforestation
- Burning wood
- Carbon particles
- Combustion
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Explore DiagramsFrequently Asked Questions
What are the important topics in Combustion and Flame for Gujarat Board Class 8 Science?
Key topics in Combustion and Flame include What is Combustion?, Ignition Temperature and Conditions for Combustion, How Do We Control Fire?, Types of Combustion. Study these first, then practise questions on each for Class 8 exams.
What do the concept maps for Combustion and Flame show?
The 3 maps show how the ideas in Combustion and Flame connect: Combustion and Flame – Chapter Overview Mind Map; Combustion and Flame Concept Overview. Each map is also written out as an outline on this page.
How should I revise Combustion and Flame for Class 8 exams?
Learn the core ideas first, then work through the 45 practice questions on Combustion and Flame. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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